WO2023040824A1 - 电子设备及控制方法 - Google Patents
电子设备及控制方法 Download PDFInfo
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- WO2023040824A1 WO2023040824A1 PCT/CN2022/118418 CN2022118418W WO2023040824A1 WO 2023040824 A1 WO2023040824 A1 WO 2023040824A1 CN 2022118418 W CN2022118418 W CN 2022118418W WO 2023040824 A1 WO2023040824 A1 WO 2023040824A1
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- mos transistor
- circuit
- coil
- turn
- load modulation
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device
- G06K17/0025—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device the arrangement consisting of a wireless interrogation device in combination with a device for optically marking the record carrier
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10366—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
- H04B5/45—Transponders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10198—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes
Definitions
- the embodiments of the present application relate to the field of electronic technologies, and in particular, to an electronic device and a control method.
- 125K low-frequency radio frequency identification (Radio Frequency Identification, RFID) technology is a near-field communication identification technology with a carrier frequency of 125K-135K Hz. Because of its low cost and fast identification, it has a large number of applications in access control; wireless charging technology is a Based on the wireless energy transmission technology with a carrier frequency of 110K-190K Hz, in order to achieve correct energy transmission, it is also accompanied by communication technology.
- RFID Radio Frequency Identification
- the inventor found that there are at least the following problems in the prior art: the layout area of the RFID circuit is relatively large, however, as users have higher and higher requirements for the portability of electronic equipment, existing electronic equipment The volume is getting smaller and smaller, and the space is limited. Therefore, it is difficult for existing electronic devices to integrate the RFID card reading function.
- the embodiments of the present application provide an electronic device and a control method, which can solve the problem that it is difficult for the electronic device to integrate an RFID card reading function.
- an embodiment of the present application provides an electronic device, including a wireless charging circuit, an antenna module, and a matching circuit;
- the matching circuit includes a first resonant capacitor, a first load modulation capacitor, a second load modulation capacitor, and a pack A network detection circuit;
- the wireless charging circuit includes a micro control unit, a demodulation circuit, an H bridge drive circuit, a first load modulation circuit and a second load modulation circuit;
- the H-bridge drive circuit includes a first half-bridge drive circuit and a second half-bridge drive circuit, the first ends of the first half-bridge drive circuit and the second half-bridge drive circuit are electrically connected to the power supply terminal, the second Both ends are grounded, and the first half-bridge driving circuit is electrically connected to the second half-bridge driving circuit via the antenna module and the first resonant capacitor in turn, and the H-bridge driving circuit is used to drive the
- the above antenna module works in wireless charging transmission mode, wireless charging receiving mode, RFID card reading mode or RFID card simulation mode;
- the first load modulation circuit is electrically connected to the antenna module and the envelope detection circuit via the first load modulation capacitor
- the second load modulation circuit is respectively connected to the antenna module and the envelope detection circuit via the second load modulation capacitor.
- the antenna module, the first resonant capacitor are electrically connected to the envelope detection circuit;
- the envelope detection circuit is also electrically connected to the demodulation circuit;
- the micro control unit is electrically connected to the demodulation circuit, the first load modulation circuit, the second load modulation circuit, the first half-bridge driving circuit and the second half-bridge driving circuit respectively.
- the embodiment of the present application provides a control method, which is applied to the electronic device described in the first aspect, and the method includes:
- the first working mode is wireless charging receiving mode, wireless charging transmitting mode, RFID card reading mode or RFID card simulation mode;
- the working state of the electronic device is controlled.
- the electronic device In the embodiment of the present application, only a small number of components need to be added to enable the electronic device to support the wireless charging receiving function, wireless charging transmitting function, RFID card reading function and RFID card simulation function through the sharing of part of the hardware. In the case of affecting the size of the electronic device, the functions of the electronic device are enriched.
- Fig. 1 is one of the structural diagrams of the electronic equipment provided by the embodiment of the present application.
- Fig. 2 is a schematic diagram of signal transmission improved by the embodiment of the present application.
- FIG. 3 is the second structural diagram of the electronic device provided by the embodiment of the present application.
- Fig. 4 is the third structural diagram of the electronic device provided by the embodiment of the present application.
- FIG. 5 is the fourth structural diagram of the electronic device provided by the embodiment of the present application.
- FIG. 6 is the fifth structural diagram of the electronic device provided by the embodiment of the present application.
- Fig. 7 is a flowchart of a control method provided by an embodiment of the present application.
- the electronic device may include a wireless charging circuit 10 , an antenna module 20 and a matching circuit 30 .
- the matching circuit 30 may include a first resonant capacitor 31 , a first load modulation capacitor 32 , a second load modulation capacitor 33 and an envelope detection circuit 34 .
- the number of the first resonant capacitor 31 , the first load modulation capacitor 32 , and the second load modulation capacitor 33 can be one or more, which can be determined according to actual needs, which is not limited in this embodiment of the present application.
- the wireless charging circuit 10 may include a micro control unit 11 , a demodulation circuit 12 , an H-bridge driving circuit 13 , a first load modulation circuit 14 and a second load modulation circuit 15 .
- the H-bridge driving circuit 13 may include a first half-bridge driving circuit 131 and a second half-bridge driving circuit 132, the first ends of the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 are connected to the power supply terminal ( VCC) is electrically connected, the second ends are grounded, and the first half-bridge driving circuit 131 is electrically connected to the second half-bridge driving circuit 132 via the antenna module 20 and the first resonant capacitor 31 in turn.
- VCC power supply terminal
- the first load modulation circuit 14 is electrically connected to the antenna module 20 and the envelope detection circuit 34 respectively via the first load modulation capacitor 32, and the second load modulation circuit 15 is respectively connected to the antenna module 20 and the first load modulation circuit 33 via the second load modulation capacitor 33.
- the resonant capacitor 31 is electrically connected to the envelope detection circuit 34 ; the envelope detection circuit 34 is also electrically connected to the demodulation circuit 12 .
- the micro control unit 11 is electrically connected to the demodulation circuit 12 , the first load modulation circuit 14 , the second load modulation circuit 15 , the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 .
- the wireless charging circuit 10 can be an integrated circuit (Integrated Circuit, IC), in this case, the wireless charging circuit 10 can be called a wireless charging IC.
- IC Integrated Circuit
- the wireless charging circuit 10 may not be integrated, which may be determined according to actual conditions, which is not limited in this embodiment of the present application.
- the H-bridge driving circuit 13 can be used to drive the antenna module 20 to work in the wireless charging transmitting mode, wireless charging receiving mode, RFID card reading mode or RFID card simulation mode.
- the antenna module 20 can include at least one coil
- the H-bridge drive circuit 13 can be used to drive part or all of the coils in the antenna module to oscillate, so as to realize wireless charging, reverse wireless charging, RFID card identification or RFID card Analog, therefore, the H-bridge drive circuit can also be called a coil drive circuit or an H-bridge coil drive circuit.
- the H-bridge driving circuit 13 may drive the coil to oscillate through a half-bridge driving circuit, and in this case, the H-bridge driving circuit 13 may be considered to be in a half-bridge driving mode.
- the H-bridge driving circuit 13 can realize coil driving through two half-bridge driving circuits, and in this case, the H-bridge driving circuit 13 can be considered to be in the H-bridge driving mode.
- the first load modulation circuit 14 and the second load modulation circuit 15 can be used for load modulation to perform protocol communication with the wireless charging transmitting device or to realize card number transmission.
- the envelope detection circuit 34 can be used for filtering the carrier and preserving the baseband signal.
- the demodulation circuit 12 can be used to demodulate the baseband signal to obtain the expected charging power of the charging receiving device or the card number of the RFID card.
- the envelope detection circuit 34 and the demodulation circuit 12 can be used to: determine the transmission power of the antenna module 20, the transmission power is determined based on the expected charging power of the charging receiving device; and determine the card number of the RFID card.
- the RFID card may be a physical RFID card or a simulated RFID card.
- the electronic device can also include other components, such as an application processor, which is used to realize the overall control of the electronic device, can store the card number, and Send the card number through wireless communication or Universal Serial Bus (USB) connection.
- an application processor which is used to realize the overall control of the electronic device, can store the card number, and Send the card number through wireless communication or Universal Serial Bus (USB) connection.
- USB Universal Serial Bus
- the working modes of the electronic device may include: a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode and an RFID card emulating mode.
- the electronic device When the electronic device is in the wireless charging receiving mode, the electronic device is equivalent to the wireless charging receiving device at this time, and can perform the following operations: realize load modulation through the load modulation circuit to communicate with the wireless charging transmitting device; drive the antenna module The coil in the battery oscillates to realize the full-bridge rectification effect and realize wireless charging.
- the electronic device When the electronic device is in the wireless charging transmission mode, the electronic device is equivalent to a wireless charging transmitting device at this time, and can perform the following operations: drive the coil in the antenna module to realize reverse wireless charging; pass the envelope detection circuit and demodulation The circuit determines the transmit power of the antenna module.
- the electronic device When the electronic device is in the RFID card reading mode, the electronic device is equivalent to an RFID card reading device at this time, and can perform the following operations: drive the coil in the antenna module to realize the card reading function; pass the envelope detection circuit and demodulation circuit Determine the card number of the RFID card.
- the electronic device When the electronic device is in the RFID card simulation mode, the electronic device is now equivalent to an RFID card, and the load modulation circuit can be used to realize load modulation, so as to realize the sending of the card number.
- the H bridge drive circuit 13 can drive the coil oscillation of the antenna module 20, radiate outwards, and transmit the carrier signal; After receiving the carrier signal, the charging receiving device (or RFID card) starts load modulation, so that the amplitude of the carrier changes, and a carrier signal with a load modulation signal is formed at the end of the coil close to the resonant capacitor.
- the carrier wave with load modulation signal is transmitted to the envelope detection circuit 34 , the envelope detection circuit 34 filters the carrier wave, retains the baseband signal, and transmits the baseband signal to the demodulation circuit 12 .
- the demodulation circuit 12 is used to demodulate the baseband signal to obtain the desired charging power (or the card number of the RFID card) of the charging receiving device.
- the wireless charging receiving mode, the wireless charging transmitting mode, the RFID card reading mode and the RFID card simulating mode can share at least one of the following implementations: wireless charging circuit; coil; matching circuit.
- the specific instructions are as follows:
- the antenna module 20 can include a radio frequency identification RFID coil 21 and a wireless charging coil 22; the matching circuit can also include a gating switch 35 and a second resonant capacitor 36; wherein:
- the first end of the second resonance capacitor 36 is electrically connected to the first load modulation circuit 14 via the first load modulation capacitor 32, and the second end of the second resonance capacitor 36 is grounded;
- the gating switch 35 is electrically connected with the first point (marked as A in the figure), the second point (marked as B in the figure), the envelope detection circuit 34 and the micro control unit 11 respectively, and the first point is the first resonance A common point between the capacitor 31 and the second end of the wireless charging coil 22, the second point being a common point between the first load modulation capacitor 32 and the second resonant capacitor 36;
- the first end of the RFID coil 21 is electrically connected to the first half-bridge drive circuit 131, and the second end of the RFID coil 21 is electrically connected to the second point;
- the first end of the wireless charging coil 22 is electrically connected to the first half-bridge drive circuit 131, and the second end of the wireless charging coil 22 is electrically connected to the second half-bridge drive circuit 132 through the first resonant capacitor 31;
- the second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .
- the first load modulation circuit 14 can be used to realize the sending of the card number.
- the second load modulation circuit 15 is used to implement protocol communication with the wireless charging transmitting device.
- the RFID coil 21 is used to realize the card number identification of the RFID card; the wireless charging coil 22 is used to realize wireless charging or reverse wireless charging. Therefore, the second resonance capacitor 36 connected to the RFID coil 21 can be called an RFID resonance capacitor, and the first load modulation capacitor 32 connected to the RFID coil 21 can be called an RFID load modulation capacitor; the first resonance capacitor 31 connected to the wireless charging coil 22 can be It is called a wireless charging resonant capacitor, and the second load modulation capacitor 33 connected to the wireless charging coil 22 may be called a wireless charging load modulation capacitor.
- the gating switch 35 can connect the envelope detection circuit 34 and the first point. At this time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the desired charging power of the wireless charging receiving device.
- the strobe switch 35 can also conduct the envelope detection circuit 34 and the second point. At this time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the card number of the RFID card.
- the wireless charging coil 22 and the RFID coil 21 are completely independently designed, the wireless charging circuit is shared, the resonant capacitor and the load modulation capacitor in the matching circuit are independently designed, and the envelope detection circuit 34 is shared by the gate switch 35, so that the electronic device Support wireless charging receiving function, wireless charging transmitting function, RFID card reading function and RFID card simulation function.
- the electronic device can communicate with the wireless charging transmitting device through the second load modulation circuit 15, and can drive the wireless charging coil 22 through the H-bridge driving circuit 13 to realize wireless charging.
- the electronic device may control the first load modulation circuit 14 to be in an off state, so as to save power consumption.
- the electronic device can control the second load modulation circuit 15 to alternately be in the on state or the off state according to the first preset frequency, so as to perform protocol communication with the wireless charging transmitting device.
- the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to realize a full-bridge rectification effect and realize wireless charging.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately communicate with the power supply terminal and ground according to the second preset frequency, that is, at the same time, the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132, one half-bridge driving circuit is connected to the power supply terminal but not grounded, and the other half-bridge driving circuit is not connected to the power supply terminal but is grounded.
- the first half-bridge driving circuit 131 can be controlled to be connected to the power supply terminal, and the second half-bridge driving circuit 132 can be connected to the ground; afterward, the first half-bridge driving circuit 131 can be controlled to be connected to the power supply terminal.
- the power supply terminal of the first half-bridge drive circuit 131, the wireless charging coil 22, the wireless charging resonant capacitor and the second half-bridge drive The ground of the circuit 132 forms a path, and the current flows from the power terminal connected to the first half-bridge driving circuit 131 to the ground of the second half-bridge driving circuit 132 to form a forward current.
- the first half-bridge driving circuit 131 When the first half-bridge driving circuit 131 is grounded and the second half-bridge driving circuit 132 is connected to the power supply terminal, the ground of the first half-bridge driving circuit 131, the wireless charging coil 22, the wireless charging resonant capacitor and the second half-bridge driving circuit 132
- the power supply terminal of the second half-bridge driving circuit 132 forms a path, and the current flows from the power supply terminal connected to the second half-bridge driving circuit 132 to the ground of the first half-bridge driving circuit 131, forming a reverse current.
- first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 are alternately connected to and grounded to the power supply terminal, a reciprocating oscillating current will be formed, which will change the oscillating voltage of the coil of the wireless charging transmitting device, and realize the full-bridge rectification effect.
- Wireless charging Since the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 are alternately connected to and grounded to the power supply terminal, a reciprocating oscillating current will be formed, which will change the oscillating voltage of the coil of the wireless charging transmitting device, and realize the full-bridge rectification effect. Wireless charging.
- the electronic device can drive the wireless charging coil 22 through the H-bridge driving circuit 13 to realize wireless charging.
- the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to realize reverse wireless charging.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. Let me repeat.
- the gating switch 35 can conduct the envelope detection circuit 34 and the first point, so that the envelope detection circuit 34 and the demodulation circuit 12 can obtain the desired charging power of the charging receiving device after demodulating the load modulation signal, and then The electronic device can be triggered to adjust the transmitting power of the antenna module 20 .
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can drive the RFID coil 21 through the H-bridge driving circuit 13 to realize the card number identification of the RFID card.
- the electronic device can control the second half-bridge driving circuit 132 to be in the off state, and at this time the H-bridge driving circuit 13 is in the half-bridge driving mode.
- the micro control unit 11 can control the first half-bridge driving circuit 131 to be alternately connected to the power terminal or grounded, that is, at the same time, the first half-bridge driving circuit 131 is connected to the power terminal or grounded.
- the first half-bridge driving circuit 131 can be controlled to be connected to the power terminal but not grounded; then, the first half-bridge driving circuit 131 can be controlled to be grounded but not connected to the power terminal.
- the first half-bridge drive circuit 131 When the first half-bridge drive circuit 131 is connected to the power supply terminal but not grounded, the power ground, the third coil 25, the second resonant capacitor 36 and the ground of the first half-bridge drive circuit 131 form a path, and the current flows from the first half
- the power terminal connected to the bridge driving circuit 131 flows to the ground, forming a forward current.
- the second resonant capacitor 36, the third coil 25 and the ground of the first half-bridge drive circuit 131 form a path, and the current flows from the second resonant capacitor 36 to the first half-bridge drive circuit 131.
- the ground of the half-bridge driving circuit 131 forms a reverse current.
- the gating switch 35 can connect the envelope detection circuit 34 and the second point.
- the card number of the RFID card can be obtained after the envelope detection circuit 34 and the demodulation circuit 12 demodulate the load modulation signal.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can transmit the card number through the first load modulation circuit 14 and the first half-bridge driving circuit 131 .
- the path where the first load modulation circuit 14 and the first half-bridge driving circuit 131 are located can form a loop current or disconnect the current loop. In the circuit path, as long as one end is disconnected, the path can be disconnected. Therefore, the sending of the card number can be realized by the first load modulation circuit 14 and the first half-bridge drive circuit 131 in the following manner:
- the first implementation mode the first load modulation circuit 14 can be controlled to be in the conduction state according to the preset frequency, and the first half-bridge driving circuit 131 is grounded; after that, the first load modulation circuit 14 is controlled to be in the off state, and the first half-bridge The driving circuit 131 is not grounded, and so on.
- the second implementation mode the first load modulation circuit 14 can be controlled to be always in the conduction state, and the first half-bridge drive circuit 131 can be controlled to be grounded and not grounded alternately according to a preset frequency.
- the first half-bridge driving circuit 131 can be controlled to be in a grounded state all the time, and the first load modulation circuit 14 can be controlled to be turned on or off alternately according to a preset frequency.
- the electronic device can control the second load modulation circuit 15 , the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the antenna module 20 includes a first coil 23, and the first coil 23 includes a driving common (COM) end, a wireless charging (Wireless Power Charge, WPC) end and an RFID end, and the WPC end is located at the driving Between the common terminal and the RFID terminal; the matching circuit also includes a gating switch 35, a second resonant capacitor 36 and a first switch 37; wherein:
- the first end of the second resonance capacitor 36 is electrically connected to the first load modulation circuit 14 through the first load modulation capacitor 32, and the second end of the second resonance capacitor 36 is grounded through the first switch 37;
- the gating switch 35 is electrically connected with the first point, the second point, the envelope detection circuit 34 and the micro control unit 11 respectively, the first point is the common point between the first resonant capacitor 31 and the WPC end, and the second point is the second point A common point between the second resonant capacitor 36 and the first load modulation capacitor 32;
- the drive common end is electrically connected to the first half-bridge drive circuit 131, the WPC end is electrically connected to the second half-bridge drive circuit 132 via the first resonant capacitor 31, and the RFID end is electrically connected to the second point;
- the second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .
- the first load modulation circuit 14 can be used to realize the sending of the card number.
- the second load modulation circuit 15 is used to implement protocol communication with the wireless charging transmitting device.
- the part of the first coil 23 between the driving COM terminal and the WPC terminal may be equivalent to a wireless charging coil, and may be used to realize wireless charging or reverse wireless charging.
- the part of the first coil 23 between the drive COM terminal and the RFID terminal may be equivalent to an RFID identification coil, and may be used to identify the card number of the RFID card.
- the second resonance capacitor 36 connected to the RFID end of the first coil 23 can be referred to as an RFID resonance capacitor
- the first load modulation capacitor 32 connected to the RFID end of the first coil 23 can be referred to as an RFID load modulation capacitor
- the first resonant capacitor 31 at the WPC end may be called a wireless charging resonant capacitor
- the second load modulation capacitor 33 connected to the WPC end of the first coil 23 may be called a wireless charging load modulation capacitor.
- the electronic equipment shares part of the coils. Since the RFID identification technology and the wireless charging technology share some coils, in order to avoid mutual interference between the wireless charging technology and the RFID identification technology, a second resonant capacitor 36 and a first switch 37 are newly added.
- a gating switch 35 is newly added, so that the envelope detection circuit 34 and the demodulation circuit 12 respectively realize signal demodulation under different technologies.
- the gating switch 35 can connect the envelope detection circuit 34 and the first point. At this time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the desired charging power of the wireless charging receiving device.
- the strobe switch 35 can also conduct the envelope detection circuit 34 and the second point. At this time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the card number of the RFID card.
- the wireless charging circuit is completely shared, and the matching circuit and the coil are partly shared, so that the electronic device supports the wireless charging transmission mode and the RFID card reading mode.
- the electronic device can communicate with the wireless charging transmitting device through the second load modulation circuit 15, and the H-bridge driving circuit 13 can drive the part between the driving COM terminal and the WPC terminal of the first coil 23 to realize wireless charging. .
- the electronic device may control the first load modulation circuit 14 to be in an off state, so as to save power consumption.
- the electronic device can control the second load modulation circuit 15 to alternately be in the on state or the off state according to the first preset frequency, so as to perform protocol communication with the wireless charging transmitting device.
- the H-bridge driving circuit 13 can drive part of the first coil 23 to oscillate between the driving COM terminal and the WPC terminal through the H-bridge driving mode, so as to realize a full-bridge rectification effect and realize wireless charging.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect with the power supply terminal and ground according to the second preset frequency, so that the oscillation voltage of the coil of the wireless charging transmitting device changes , to achieve full-bridge rectification effect, to achieve wireless charging.
- the micro control unit 11 can control the first switch 37 to always be in the off state.
- the electronic device can realize wireless charging by driving the part between the driving COM terminal and the WPC terminal of the first coil 23 through the H-bridge driving circuit 13 .
- the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to realize reverse wireless charging.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. Let me repeat.
- the micro control unit 11 may control the first switch 37 to be turned off.
- the gating switch 35 can conduct the envelope detection circuit 34 and the first point, so that the envelope detection circuit 34 and the demodulation circuit 12 can obtain the desired charging power of the charging receiving device after demodulating the load modulation signal, and then The electronic device can be triggered to adjust the transmitting power of the antenna module 20 .
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can drive the part between the driving COM terminal and the RFID terminal of the first coil 23 through the H-bridge driving circuit 13 to realize the card number identification of the RFID card.
- the electronic device can control the second half-bridge driving circuit 132 to be in the off state, and at this time the H-bridge driving circuit 13 is in the half-bridge driving mode.
- the micro control unit 11 can control the first half-bridge driving circuit 131 to be alternately connected to the power terminal or grounded, that is, at the same time, the first half-bridge driving circuit 131 is connected to the power terminal or grounded.
- the gating switch 35 can connect the envelope detection circuit 34 and the second point.
- the card number of the RFID card can be obtained after the envelope detection circuit 34 and the demodulation circuit 12 demodulate the load modulation signal.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can send the card number through the first load modulation circuit 14 and the first half-bridge drive circuit 131.
- the path where the first load modulation circuit 14 and the first half-bridge driving circuit 131 are located can form a loop current or disconnect the current loop.
- the first load modulation circuit 14 can be controlled to be in the on state, and the first half-bridge drive circuit 131 is grounded; after that, the first load modulation circuit 14 can be controlled to be in the off state, and/or, the first half-bridge drive Circuit 131 is not grounded, and so on.
- the electronic device can control the second load modulation circuit 15 and the second half-bridge driving circuit 132 to be in the disconnected state, so as to save power consumption and avoid the interference of the wireless charging function on the RFID card simulation.
- Mode 2 The electronic device can transmit the card number through the first load modulation circuit 14 and the first switch 37 .
- the path where the first load modulation circuit 14 and the first switch 37 are located can form a loop current or disconnect the current loop.
- first the first load modulation circuit 14 can be controlled to be in the conduction state, and the first switch 37 is turned on; afterward, the first load modulation circuit 14 is controlled to be in the off state, and/or, the first switch 37 is turned off, so repeatedly.
- the electronic device can control the second load modulation circuit 15, the first half-bridge driving circuit and the second half-bridge driving circuit 132 to be in the disconnected state, so as to save power and avoid the interference of the wireless charging function on the RFID card simulation. .
- the electronic device can implement the sending of the card number and the first switch 37 through the first load modulation circuit 14 and the first half-bridge driving circuit 131 .
- the first load modulation circuit 14 can be controlled to be in the conducting state, the first half-bridge driving circuit 131 is grounded, and the first switch 37 is conducting; after that, the control The first load modulation circuit 14 is in the disconnected state, and/or the first half-bridge driving circuit 131 is not grounded, and/or the first switch 37 is turned off, and so on.
- the electronic device can control the second load modulation circuit 15 and the second load modulation circuit 15 to be in a disconnected state, so as to save power consumption and avoid interference of the wireless charging function to the RFID card simulation.
- the antenna module 20 may include a second coil 24 and a third coil 25; the matching circuit also includes a gating switch 35, a second resonant capacitor 36 and a first switch 37; wherein:
- the first end of the second resonance capacitor 36 is electrically connected to the first load modulation circuit 14 through the first load modulation capacitor 32, and the second end of the second resonance capacitor 36 is grounded through the first switch 37;
- the gating switch 35 is electrically connected to the first point, the second point, the envelope detection circuit 34 and the micro control unit 11 respectively, and the first point is a common point between the first resonant capacitor 31 and the second end of the second coil 24 , the second point is the common point between the second resonant capacitor 36 and the first load modulation capacitor 32;
- the first end of the second coil 24 is electrically connected to the first half-bridge drive circuit 131, and the second end of the second coil 24 is electrically connected to the second half-bridge drive circuit 132 via the first resonant capacitor 31;
- the first end of the third coil 25 is electrically connected to the first half-bridge drive circuit 131, and the second end of the third coil 25 is electrically connected to the second point;
- the second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .
- the main difference between the third embodiment and the first embodiment is that the third embodiment adds a first switch 37 to the first embodiment, so that the third embodiment can realize the independent control of the second coil 24 and the third coil 25 . Therefore, in the third embodiment, the four operating modes of the electronic device can be realized through a single coil, and the four operating modes of the electronic device can also be realized through a double coil, which can be determined according to the actual situation. Do limited.
- the second coil 24 can be used to: realize wireless charging or reverse wireless charging; and/or realize card number identification of an RFID card.
- the third coil 25 can be used to: realize wireless charging or reverse wireless charging; and/or realize card number identification of an RFID card.
- the first load modulation circuit 14 can be used to: implement the sending of the card number; and/or implement protocol communication with the wireless charging transmitting device.
- the second load modulation circuit 15 can be used to: implement the sending of the card number; and/or implement protocol communication with the wireless charging transmitting device.
- the electronic device can realize wireless charging through the second coil 24 and/or the third coil 25, which are described as follows:
- the micro control unit 11 can control the first load modulation circuit 14 to be in an off state, and the first switch 37 to be in an off state.
- the micro control unit 11 can first control the second load modulation circuit 15 to be in the conduction state, the second half-bridge driving circuit 132 is grounded, and then control the second load modulation circuit 15 to be in the off state, and the second half-bridge drive circuit 132 is in the off state.
- the circuit 132 is not grounded, and alternates in this way to form load modulation, realize protocol communication with the wireless charging transmitting device, and notify the other party of its required charging power.
- the H-bridge driving circuit 13 can drive the second coil 24 to oscillate through the H-bridge driving mode, so as to realize a full-bridge rectification effect and realize wireless charging.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect with the power supply terminal and ground according to the second preset frequency, so that the oscillation voltage of the coil of the wireless charging transmitting device changes , to achieve full-bridge rectification effect, to achieve wireless charging.
- the microcontroller unit 11 can control the second half-bridge driving circuit 132 to be in an off state.
- the micro control unit 11 can control the first load modulation circuit 14 and the first switch 37, or control the first load modulation circuit 14 and the first half-bridge drive circuit 131 to form load modulation, so as to realize protocol communication with the wireless charging transmitting device, Inform the other party of the required charging power.
- the micro control unit 11 When the micro control unit 11 forms load modulation by controlling the first load modulation circuit 14 and the first switch 37, it can first control the first load modulation circuit 14 to be in a conducting state, and the first switch 37 is conducting, and then control the first load The modulation circuit 14 is in the off state, the first switch 37 is off, and so on alternately.
- the micro-control unit 11 When the micro-control unit 11 forms load modulation by controlling the first load modulation circuit 14 and the first half-bridge drive circuit 131, it can first control the first load modulation circuit 14 to be in a conduction state, and the first half-bridge drive circuit 131 is grounded, and then , the first load modulation circuit 14 is controlled to be in an off state, the first half-bridge driving circuit 131 is not grounded, and so on alternately.
- the H-bridge driving circuit 13 can drive the third coil 25 to oscillate through the first half-bridge driving circuit 131 to realize the full-bridge rectification effect and wireless charging.
- the H-bridge driving circuit 13 is in the half-bridge driving mode.
- the micro-control unit 11 can control the first half-bridge driving circuit 131 to be alternately connected to or grounded to the power supply terminal. For details, please refer to the above-mentioned related descriptions, which will not be repeated here.
- the first switch 37 is controlled to be turned on.
- Wireless charging is realized by using the second coil 24 and the third coil 25 .
- the micro control unit 11 can control the first switch 37 to always be in the conduction state.
- the micro control unit 11 can control one of the first load modulation circuit 14 and the second load modulation circuit 15 to be regularly turned on or off to form load modulation, realize protocol communication with the wireless charging transmitting device, and notify the other party of its own needs. charging power.
- the H-bridge driving circuit 13 can drive the second coil 24 and the third coil 25 to oscillate through the H-bridge driving mode.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect with the power supply terminal and ground according to the second preset frequency, so that the oscillation voltage of the coil of the wireless charging transmitting device changes , to achieve full-bridge rectification effect, to achieve wireless charging.
- the envelope detection circuit 34 and the demodulation circuit 12 are used to obtain the desired charging power of the charging receiving device after demodulating the load modulation signal, and then trigger the electronic device to adjust the transmitting power of the antenna module 20 .
- the electronic device can perform reverse wireless charging through the second coil 24 and/or the third coil 25, which are described as follows:
- the electronic device can drive the second coil 24 through the H-bridge driving circuit 13 to realize wireless charging.
- the first switch 37 can be controlled to be turned off.
- the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to realize reverse wireless charging.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. Let me repeat.
- the gating switch 35 can connect the envelope detection circuit 34 and the first point.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can drive the third coil 25 through the H-bridge driving circuit 13 to realize wireless charging.
- the second half-bridge driving circuit 132 can be controlled to be in an off state.
- the H-bridge driving circuit 13 can drive the third coil 25 to oscillate through the first half-bridge driving circuit 131.
- the H-bridge driving circuit 13 is in the half-bridge driving mode.
- the micro control unit 11 may control the first half-bridge driving circuit 131 to be alternately connected to the power terminal or grounded.
- the first switch 37 is controlled to be turned on. Further, it is possible to control the first switch 37 to always be in a conducting state.
- the gating switch 35 can connect the envelope detection circuit 34 and the second point.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the micro control unit 11 can control the first switch 37 to always be in the conduction state.
- the electronic device can drive the third coil 25 and the third coil 25 through the H-bridge driving circuit 13 to realize wireless charging.
- the H-bridge drive circuit 13 can drive the second coil 24 to oscillate and the third coil 25 through the H-bridge drive mode.
- the micro control unit 11 may control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to be alternately connected to and grounded to the power supply terminal according to a second preset frequency. For specific implementation, reference may be made to the foregoing related descriptions, which will not be repeated here.
- the gating switch 35 can alternately turn on the envelope detection circuit 34 and the first point or the second point.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the card number of the RFID card can be obtained after the envelope detection circuit 34 and the demodulation circuit 12 demodulate the load modulation signal.
- the electronic device can identify the card number through the second coil 24 and/or the third coil 25, respectively as follows:
- the first switch 37 can be controlled to be turned off, and the second half-bridge driving circuit 132 is grounded.
- the H-bridge driving circuit 13 can be alternately connected to power or ground through the first half-bridge driving circuit 131 to drive the second coil 24 to oscillate.
- the gating switch 35 can connect the envelope detection circuit 34 and the first point.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the first switch 37 can be controlled to be turned on, and the second half-bridge driving circuit 132 is turned off.
- the H-bridge driving circuit 13 can be alternately connected to power or ground through the first half-bridge driving circuit 131 to drive the third coil 25 to oscillate.
- the gating switch 35 can connect the envelope detection circuit 34 and the second point.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the second half-bridge driving circuit 132 can be controlled to be grounded, and the first switch 37 is turned on; the H-bridge driving circuit 13 can be alternately connected to power or ground through the first half-bridge driving circuit 131 to drive the second coil 24 And the third coil 25 oscillates.
- the gating switch 35 can alternately conduct the envelope detection circuit 34 and the first point or the second point to realize time-division reception of data.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can perform RFID card simulation through the second coil 24 and/or the third coil 25, respectively as follows:
- the electronic device can transmit the card number through the second load modulation circuit 15 and the first half-bridge driving circuit 131 .
- the path where the second load modulation circuit 15 and the first half-bridge driving circuit 131 are located can form a loop current or disconnect the current loop.
- the second load modulation circuit 15 can be controlled to be in the conduction state, and the first half-bridge drive circuit 131 is grounded; afterward, the second load modulation circuit 15 is controlled to be in the off state, and/or, the first half-bridge drive Circuit 131 is not grounded, and so on.
- the electronic device can control the first load modulation circuit 14 and the second half-bridge drive circuit 132 to be in the disconnected state, so as to save power consumption and avoid the interference of the wireless charging function on the RFID card simulation.
- Method 2 The electronic device can transmit the card number through the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 .
- the path where the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 are located can form a loop current or disconnect the current loop.
- the first half-bridge driving circuit 131 can be controlled to be grounded, and the second half-bridge driving circuit 132 can be grounded; afterward, the first half-bridge driving circuit 131 can be controlled not to be grounded, and/or the second half-bridge driving circuit 132 can be grounded , so repeatedly.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state, so as to save power consumption.
- Mode 3 The electronic device can realize the sending of the card number through the second load modulation circuit 15 , the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 .
- the second load modulation circuit 15 can be controlled to be in a conducting state first, the first half-bridge drive circuit 131 is grounded, and the second half-bridge drive circuit 132 is grounded; then , control the second load modulation circuit 15 to be in the off state, and/or, the first half-bridge driving circuit 131 is not grounded, and/or, the second half-bridge driving circuit 132 is not grounded, and so on.
- the electronic device can control the first load modulation circuit 14 to be in an off state, so as to save power consumption.
- the first switch may be controlled to be turned off, so as to save power consumption.
- the electronic device can transmit the card number through the first load modulation circuit 14 and the first half-bridge driving circuit 131 .
- the path where the first load modulation circuit 14 and the first half-bridge driving circuit 131 are located can form a loop current or disconnect the current loop.
- the first load modulation circuit 14 can be controlled to be in the on state, and the first half-bridge drive circuit 131 is grounded; after that, the first load modulation circuit 14 can be controlled to be in the off state, and/or, the first half-bridge drive Circuit 131 is not grounded, and so on.
- the electronic device can control the second load modulation circuit 15 and the second half-bridge driving circuit 132 to be in an off state, so as to save power consumption.
- Mode 2 The electronic device can transmit the card number through the first load modulation circuit 14 and the first switch 37 .
- the path where the first load modulation circuit 14 and the first switch 37 are located can form a loop current or disconnect the current loop.
- first the first load modulation circuit 14 can be controlled to be in the conduction state, and the first switch 37 is turned on; afterward, the first load modulation circuit 14 is controlled to be in the off state, and/or, the first switch 37 is turned off, so repeatedly.
- the electronic device can control the second load modulation circuit 15 , the first half-bridge driving circuit and the second half-bridge driving circuit 132 to be in an off state, so as to save power consumption.
- the electronic device can implement the sending of the card number and the first switch 37 through the first load modulation circuit 14 and the first half-bridge driving circuit 131 .
- the first load modulation circuit 14 can be controlled to be in a conducting state, the first half-bridge driving circuit 131 is grounded, and the first switch 37 is conducting; after that, the control The first load modulation circuit 14 is in the disconnected state, and/or the first half-bridge driving circuit 131 is not grounded, and/or the first switch 37 is turned off, and so on.
- the electronic device can control the second load modulation circuit 15 and the second load modulation circuit 15 to be in a disconnected state, so as to save power consumption.
- the electronic device can transmit the card number through the first load modulation circuit 14 , the second load modulation circuit 15 and the first half-bridge drive circuit 131 .
- the electronic device can first control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a conducting state, and the first half-bridge drive circuit 131 is grounded to realize a current loop for the second coil 24 and the third coil 25 Form; After that, control the first load modulation circuit 14 to be in the disconnected state, and/or, the second load modulation circuit 15 to be in the disconnected state, and/or, the first half-bridge drive circuit 131 is not grounded, so repeated, to realize the The pumping of the coil of the access control device can realize the sending of the card number.
- the electronic device can control the second half-bridge driving circuit 132 to be in an off state, and control the first switch 37 to be off, so as to save power consumption.
- the antenna module 20 may include a fourth coil 26; wherein:
- the first end of the fourth coil 26 is electrically connected to the second half-bridge drive circuit 132 via the first resonant capacitor 31, and the second end of the fourth coil 26 is electrically connected to the first half-bridge drive circuit 131;
- the envelope detection circuit 34 is electrically connected to the first point, and the first point is a common point between the first resonant capacitor 31 and the first end of the fourth coil;
- the first load modulation circuit 14 is electrically connected to the first point via the first load modulation capacitor 32;
- the second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .
- the fourth coil 26 can be used to: realize wireless charging; realize reverse wireless charging; realize sending of card number.
- RFID identification technology and wireless charging technology are realized through the same coil.
- the first load modulation circuit 14 can be used to realize the sending of the card number.
- the second load modulation circuit 15 is used to implement protocol communication with the wireless charging transmitting device. Therefore, the first load modulation capacitor 32 connected to the first load modulation circuit 14 may be called an RFID load modulation capacitor; the second load modulation capacitor 33 connected to the second load modulation circuit 15 may be called a wireless charging load modulation capacitor.
- the wireless charging circuit, the coil and the matching circuit are completely shared, so that the electronic device supports the RFID identification technology and the wireless charging technology.
- the electronic device can communicate with the wireless charging transmitting device through the second load modulation circuit 15, and can drive the fourth coil 26 through the H-bridge driving circuit 13 to realize wireless charging.
- the electronic device may control the first load modulation circuit 14 to be in an off state, so as to save power consumption.
- the electronic device can control the second load modulation circuit 15 to alternately be in the on state or the off state according to the first preset frequency, so as to perform protocol communication with the wireless charging transmitting device.
- the H-bridge driving circuit 13 can drive the fourth coil 26 to oscillate through the H-bridge driving mode, so as to realize a full-bridge rectification effect and realize wireless charging.
- the micro-control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to be alternately connected to the power supply terminal and grounded according to the second preset frequency, which will form a reciprocating oscillating current, so that the wireless charging can transmit
- the oscillating voltage of the coil of the device changes to realize the full-bridge rectification effect and realize wireless charging.
- the electronic device can drive the fourth coil 26 through the H-bridge driving circuit 13 to realize wireless charging.
- the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to realize reverse wireless charging.
- the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. Let me repeat.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can drive the fourth coil 26 through the H-bridge driving circuit 13 to realize the card number identification of the RFID card.
- the micro control unit 11 can control the first half-bridge driving circuit 131 to be alternately connected to or grounded to the power supply terminal, and control the second half-bridge driving circuit 132 to be grounded, so as to drive the fourth coil 26 .
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in an off state, so as to save power consumption.
- the electronic device can transmit the card number through the first load modulation circuit 14 and the first half-bridge driving circuit 131 .
- the path where the first load modulation circuit 14 and the first half-bridge driving circuit 131 are located can form a loop current or disconnect the current loop.
- the first load modulation circuit 14 can be controlled to be in the on state, and the first half-bridge drive circuit 131 is grounded; after that, the first load modulation circuit 14 can be controlled to be in the off state, and/or, the first half-bridge drive Circuit 131 is not grounded, and so on.
- the electronic device can control the second load modulation circuit 15 and the second half-bridge driving circuit 132 to be in an off state, so as to save power consumption.
- Method 2 The electronic device can transmit the card number through the second load modulation circuit 15 and the first half-bridge driving circuit 131 .
- the path where the second load modulation circuit 15 and the first half-bridge drive circuit 131 are located can form a loop current or disconnect the current loop.
- the second load modulation circuit 15 can be controlled to be in the conduction state, and the first half-bridge drive circuit 131 is grounded; afterward, the second load modulation circuit 15 is controlled to be in the off state, and/or, the first half-bridge drive Circuit 131 is not grounded, and so on.
- the electronic device can control the first load modulation circuit 14 and the second half-bridge driving circuit 132 to be in an off state, so as to save power consumption.
- the electronic device can transmit the card number through the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 .
- the path where the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 are located can form a loop current or disconnect the current loop.
- the first half-bridge driving circuit 131 can be controlled to be grounded, and the second half-bridge driving circuit 132 can be grounded; afterward, the first half-bridge driving circuit 131 can be controlled not to be grounded, and/or the second half-bridge driving circuit 132 can be grounded , so repeatedly.
- the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state, so as to save power consumption.
- the electronic device can transmit the card number through the first load modulation circuit 14 , the second load modulation circuit 15 , the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 .
- the first load modulation circuit 14 can be controlled to be in the conduction state, the second load modulation circuit 15 is in the conduction state, and the first half-bridge drive circuit 131 is grounded , the second half-bridge drive circuit 132 is grounded; then, the first load modulation circuit 14 is controlled to be in an off state, the second load modulation circuit 15 is in an off state, the first half-bridge drive circuit 131 is not grounded, and/or, the second The second half-bridge driving circuit 132 is grounded, and so on.
- the first load modulation circuit 14 includes a first field effect MOS transistor 141
- the second load modulation circuit 15 includes a second MOS transistor 151; wherein:
- the first MOS transistor 141 and the second MOS transistor 151 are N-type MOS transistors
- the gate of the first MOS transistor 141 is electrically connected to the microcontroller unit, the drain of the first MOS transistor 141 is electrically connected to the first load modulation capacitor 32, and the source of the first MOS transistor 141 is grounded;
- the gate of the second MOS transistor 151 is electrically connected to the microcontroller unit, the drain of the second MOS transistor 151 is electrically connected to the second load modulation capacitor 33 , and the source of the second MOS transistor 151 is grounded.
- the first MOS transistor 141 When the first load modulation circuit 14 is in the on state, the first MOS transistor 141 is turned on. When the first load modulation circuit 14 is in the off state, the first MOS transistor 141 is turned off.
- the second MOS transistor 151 When the second load modulation circuit 15 is in the on state, the second MOS transistor 151 is turned on. When the second load modulation circuit 15 is in the off state, the second MOS transistor 151 is turned off.
- the first half-bridge driving circuit 131 includes a third MOS transistor 1311 and a fourth MOS transistor 1312
- the second half-bridge driving circuit 132 includes a fifth MOS transistor 1321 and a sixth MOS transistor 1322; wherein:
- the third MOS transistor 1311 and the fifth MOS transistor 1321 are P-type MOS transistors, and the fourth MOS transistor 1312 and the sixth MOS transistor 1322 are N-type MOS transistors;
- the gates of the third MOS transistor 1311, the fourth MOS transistor 1312, the fifth MOS transistor 1321 and the sixth MOS transistor 1322 are all electrically connected to the micro control unit 11; the sources of the third MOS transistor 1311 and the fifth MOS transistor 1321 are connected Electrically connected to the power supply terminal; the drain of the third MOS transistor 1311 is electrically connected to the drain of the fourth MOS transistor 1312, the drain of the fifth MOS transistor 1321 is electrically connected to the drain of the sixth MOS transistor 1322; the fourth MOS transistor The sources of 1312 and the sixth MOS transistor 1322 are both grounded;
- Both the third point and the fourth point are electrically connected to the antenna module 20, the third point is the common point between the drain of the third MOS transistor 1311 and the drain of the fourth MOS transistor 1312, and the fourth point is the fifth MOS The common point between the drain of the transistor 1321 and the drain of the sixth MOS transistor 1322 .
- the third MOS transistor 1311 can be turned on and the fourth MOS transistor 1312 can be turned off.
- the third MOS transistor 1311 can be turned off and the fourth MOS transistor 1312 can be turned on.
- the first half-bridge driving circuit 131 is in the off state, the third MOS transistor 1311 and the fourth MOS transistor 1312 are turned off.
- the fifth MOS transistor 1321 can be turned on and the sixth MOS transistor 1322 can be turned off.
- the fifth MOS transistor 1321 can be turned off and the sixth MOS transistor 1322 can be turned on.
- the fifth MOS transistor 1321 and the sixth MOS transistor 1322 are turned off.
- the half-bridge driving circuit may also be formed by other switches, which may be determined according to actual conditions, which is not limited in this embodiment of the present application.
- the first switch 37 in FIG. 3 is also a MOS transistor, but in other embodiments, the first switch 37 can also be a switch of other forms, such as a single-pole double-throw switch.
- FIG. 7 is a flowchart of a control method provided by an embodiment of the present application. As shown in Figure 7, the control method may include the following steps:
- Step 701. Determine the first working mode of the electronic device, where the first working mode is a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode or an RFID card emulation mode.
- Step 702. Control the working state of the electronic device according to the first working mode.
- the working modes of the electronic device include wireless charging receiving mode, wireless charging transmitting mode, RFID card reading mode and RFID card simulation mode, so that the electronic device can realize wireless charging function, RFID card reading function, RFID card Analog functions enrich the functions of electronic equipment.
- the first load modulation circuit includes the first MOS transistor, and the second load modulation circuit includes the second MOS transistor;
- the first half-bridge driving circuit includes the third MOS transistor and the fourth MOS transistor
- the second half-bridge driving circuit includes the fifth MOS transistor and the sixth MOS transistor.
- the first working mode is a wireless charging receiving mode
- the controlling the working state of the electronic device according to the first working mode includes:
- the antenna module includes an RFID coil and a wireless charging coil
- the first MOS transistor is turned off, and the second MOS transistor is turned on or off according to the first preset frequency, and the second MOS transistor is turned on or off according to the second preset frequency. alternately turning on and off the first target MOS transistor and the second target MOS transistor;
- the antenna module includes a first coil
- the first MOS transistor and the first switch are turned off
- the second MOS transistor is turned on or off according to the first preset frequency
- the second MOS transistor is turned on or off according to the second preset frequency. Turning on and off the first target MOS transistor and the second target MOS transistor alternately at a preset frequency;
- the antenna module includes a second coil and a third coil
- the first MOS transistor and the first switch are turned off, and the first target MOS transistor is alternately turned on and off according to a second preset frequency and the second target MOS tube, controlling the working state of the second MOS tube to be the same as that of the fourth MOS tube; or, turning off the fifth MOS tube and the sixth MOS tube, according to the second Alternately turn on and off the third MOS transistor and the fourth MOS transistor at a preset frequency, control the first switch to turn on when the third MOS transistor is turned on, and control the first MOS transistor
- the working state is the same as the working state of the fourth MOS transistor or the first switch; or, turn on the first switch, turn on or turn off the third target MOS transistor according to the first preset frequency, and turn on or off the third target MOS transistor according to the second Turning on and off the first target MOS transistor and the second target MOS transistor alternately at a preset frequency;
- the antenna module includes a fourth coil
- the first MOS transistor is turned off
- the second MOS transistor is turned on or off according to the first preset frequency
- the second MOS transistor is alternately turned on according to the second preset frequency and turning off the first target MOS transistor and the second target MOS transistor;
- the first target MOS transistor includes the third MOS transistor and the sixth MOS transistor
- the second target MOS transistor includes the fourth MOS transistor and the fifth MOS transistor
- the third MOS transistor includes the fourth MOS transistor and the fifth MOS transistor
- the target MOS transistor is the first MOS transistor or the second MOS transistor.
- the first working mode is a wireless charging sending mode
- the controlling the working state of the electronic device according to the first working mode includes:
- the antenna module includes an RFID coil and a wireless charging coil
- the first MOS transistor and the second MOS transistor are turned off, and the first target MOS transistor is alternately turned on and off according to a second preset frequency and a second target MOS tube, controlling the gating switch to turn on the envelope detection circuit and the first point;
- the antenna module includes a first coil
- the first MOS transistor, the second MOS transistor and the first switch are turned off, and the first MOS transistor is turned on and off alternately according to a second preset frequency.
- a target MOS transistor and a second target MOS transistor controlling the gate switch to turn on the envelope detection circuit and the first point;
- the first MOS transistor, the second MOS transistor and the first switch are turned off, and are alternately turned on and on according to a second preset frequency.
- Turn off the first target MOS transistor and the second target MOS transistor control the gate switch to turn on the envelope detection circuit and the first point; or turn off the first MOS transistor, the second The MOS transistor, the fifth MOS transistor, and the sixth MOS transistor are alternately turned on and off according to a second preset frequency, and the third MOS transistor and the fourth MOS transistor are controlled when the third MOS transistor is turned on.
- the first switch is turned on, and the gating switch is controlled to turn on the envelope detection circuit and the second point; or, turn off the first MOS transistor and the second MOS transistor, and turn on the
- the first switch is alternately turned on and off the first target MOS transistor and the second target MOS transistor according to a second preset frequency, and the gate switch is controlled to alternately turn on the envelope detection circuit and the first point or the second point mentioned;
- the antenna module includes a fourth coil
- the first MOS transistor and the second MOS transistor are turned off, and the first target MOS transistor and the second MOS transistor are alternately turned on and off according to a second preset frequency.
- the first target MOS transistor includes the third MOS transistor and the sixth MOS transistor
- the second target MOS transistor includes the fourth MOS transistor and the fifth MOS transistor.
- the first working mode is RFID card reading mode
- the controlling the working state of the electronic device according to the first working mode includes:
- the antenna module includes an RFID coil and a wireless charging coil, turn off the first MOS transistor, the second MOS transistor, the fifth MOS transistor, and the sixth MOS transistor, according to the second Turning on and off the third MOS transistor and the fourth MOS transistor alternately at a preset frequency;
- the antenna module includes a first coil, turn off the first MOS transistor, the second MOS transistor, the fifth MOS transistor, and the sixth MOS transistor, and turn on the first MOS transistor.
- a switch that alternately turns on and off the third MOS transistor and the fourth MOS transistor according to a second preset frequency, and controls the gating switch to turn on the envelope detection circuit and the second point;
- the antenna module includes a second coil and a third coil, turn off the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the first switch, and turn on the The sixth MOS transistor, alternately turning on and off the third MOS transistor and the fourth MOS transistor according to a second preset frequency, controlling the gating switch to turn on the envelope detection circuit and the first point; or , turning off the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor, turning on the first switch, and turning on and off alternately according to a second preset frequency Turn off the third MOS transistor and the fourth MOS transistor, control the gate switch to turn on the envelope detection circuit and the second point; or alternately turn on and off the third MOS transistor according to the second preset frequency and the fourth MOS transistor, turn on the sixth MOS transistor and the first switch, turn off the first MOS transistor, the second MOS transistor and the fifth MOS transistor, and control the gate switch Alternately conducting the envelope detection circuit and the first point or the second point;
- the antenna module includes a fourth coil
- the first MOS transistor, the second MOS transistor, and the fifth MOS transistor are turned off, and the sixth MOS transistor is turned on, according to the second preset
- the frequency is set to turn on and off the third MOS transistor and the fourth MOS transistor alternately.
- the first working mode is an RFID card simulation mode
- the controlling the working state of the electronic device according to the first working mode includes:
- the antenna module includes an RFID coil and a wireless charging coil, alternately turn on or turn off the first MOS transistor and the fourth MOS transistor according to a third preset frequency, and turn off other MOS transistors; or , keep the first MOS transistor turned on, alternately turn on or turn off the fourth MOS transistor according to the third preset frequency, and turn off the other MOS transistors; or keep the fourth MOS transistor turned on, according to the third preset frequency Alternately turning on or off the first MOS transistor, and turning off other MOS transistors;
- the antenna module includes a first coil
- the first MOS transistor and the fourth MOS transistor are alternately turned on or off according to a third preset frequency, and the other MOS transistors and the first MOS transistor are turned off. switch; or, turn on or off the fourth switch and the first switch alternately according to a third preset frequency, and turn off other MOS tubes; or turn on or turn off the fourth switch alternately according to a third preset frequency
- the first MOS transistor, the fourth MOS transistor and the first switch turn off other MOS transistors;
- the antenna module includes a second coil and a third coil
- the second MOS transistor and the fourth MOS transistor are alternately turned on and off according to a third preset frequency
- the other MOS transistors and the fourth MOS transistor are turned off.
- the first switch or, alternately turn on and off the fourth MOS tube and the sixth MOS tube according to a third preset frequency, and turn off other MOS tubes and the first switch; or, according to a third preset frequency Alternately turn on and off the second MOS transistor, the fourth MOS transistor and the sixth MOS transistor, and turn off other MOS transistors and the first switch; or alternately turn on or off according to a third preset frequency Turn off the first MOS transistor and the fourth MOS transistor, turn off other MOS transistors and the first switch; or turn on or turn off the fourth switch and the fourth switch alternately according to a third preset frequency a switch to turn off other MOS transistors; or alternately turn on or turn off the first MOS transistor, the fourth MOS transistor and the first switch according to
- the antenna module includes a fourth coil, alternately turn on and off the first MOS transistor and the fourth MOS transistor according to a third preset frequency, and turn off other MOS transistors; or, according to the third preset frequency Three preset frequencies are alternately turned on and off the second MOS transistor and the sixth MOS transistor, and other MOS transistors are turned off; or, the fourth MOS transistor is alternately turned on and off according to the third preset frequency and the sixth MOS transistor, turning off other MOS transistors; or, alternately turning on and off the first MOS transistor, the second MOS transistor, the fourth MOS transistor, and the third preset frequency
- the sixth MOS transistor turns off other MOS transistors.
- the first working mode is the wireless charging receiving mode, wireless charging transmitting mode, RFID card reading mode or RFID card simulation mode
- the working status of each component of the electronic device can be found in The aforementioned related descriptions will not be repeated here.
- the strobe switch can be in an off state to save power consumption.
- the principle of this application In this case, by sharing the wireless charging IC hardware, by modifying the internal software of the wireless charging IC, that is, the control logic of the MCU and adding a 125K low-frequency RFID antenna and its matching path, so that it can be realized simultaneously under the premise of a single wireless charging IC Wireless charging function and 125K low-frequency access control function.
- the shared hardware part is not limited to all or part of the IC, antenna, matching circuit, etc.;
- the external shared circuit can be implemented in multiple ways to improve performance and achieve mutual non-interference
- the electronic equipment of this application mainly includes a wireless charging IC, a wireless charging antenna, and a 125K low-frequency RFID antenna.
- the wireless charging IC realizes the driving of the wireless charging coil, the transmission and reception of wireless charging energy, and the driving and signal detection and reception of the 125K low-frequency RFID coil, and the overall time-sharing or simultaneous realization of wireless charging and 125K low-frequency RFID functions;
- the wireless charging antenna realizes the transmission and reception of energy and protocol information during wireless charging
- the 125K low-frequency RFID antenna realizes the low-frequency RFID function, and this antenna may be shared with the wireless charging antenna in some Embodiment 1.
- the design of this case is based on the difference of its hardware common parts, there are many embodiments, and when it is in different working modes, it can pass the turn-on, turn-off and periodicity of the MOS transistors from the first MOS transistor to the sixth MOS transistor. Turn on and turn off to achieve, specific examples see below:
- the antenna, the coil, and the antenna coil may be interchanged.
- Embodiment 1 the wireless charging IC is shared, and the antenna is independently designed.
- the wireless charging IC is shared, while the wireless charging antenna is designed separately from the 125K low-frequency RFID antenna and matching circuit.
- the first half-bridge driving circuit (ie, the third MOS transistor and the fourth MOS transistor) of the coil driving circuit is connected to the common driving end of the dual antenna;
- the second half-bridge drive circuit of the coil drive circuit (that is, the fifth MOS transistor and the sixth MOS transistor) is connected to the other end of the wireless charging antenna by connecting the resonant capacitor, wherein the resonant capacitor can be formed by one or more combinations;
- the first load modulation circuit (i.e. the first MOS transistor) is connected to the two ends of the 125K antenna through a capacitor;
- the second load modulation circuit (that is, the second MOS transistor) is connected to the two ends of the wireless charging antenna through a capacitor;
- the device has four working modes, namely:
- the wireless charging antenna senses the voltage to wake up the wireless charging IC, and the wireless charging IC realizes load modulation through the "wireless charging load modulation circuit" and completes protocol communication with the wireless charging base to realize charging.
- MOS tube switching instructions the first MOS tube is turned off (because there is no need for 125K card simulation), the second MOS tube is regularly turned on or off (required for the wireless charging protocol communication function), the third MOS tube to the sixth The MOS tube is regularly turned on and off at the carrier frequency to realize the full-bridge rectification effect and realize wireless charging.
- the coil drive circuit drives the wireless charging antenna to oscillate and emit energy, and the corresponding receiving device extracts energy through load modulation, so that the oscillation voltage of the transmitting coil changes.
- the "envelope detection circuit” and “internal solution Modulation circuit” realizes the demodulation of the load modulation signal and then sends the corresponding power according to the needs of the other party.
- MOS tube switching instructions the first MOS tube is turned off (because there is no need for 125K card simulation), the second MOS tube is turned off (the wireless charging transmitter does not need it), the third MOS tube to the sixth MOS tube are regularly conducted at the carrier frequency On and off, drive the coil to realize reverse wireless charging; it is necessary to switch the strobe switch to the wireless charging terminal.
- 3125K low-frequency RFID card reading mode Similar to the above-mentioned 2reverse wireless charging mode, the coil drive circuit drives the 125K low-frequency RFID antenna to oscillate, and the RFID card tag gets energy to start when it is close to the coil, and extracts energy through load modulation to make the coil at the transmitting end oscillate The voltage changes. At this time, the "envelope detection circuit” and “internal demodulation circuit” realize the demodulation of the load modulation signal, and then know the card number information of the approaching RFID card tag.
- MOS tube switching instructions the first MOS tube, the second MOS tube, the fifth MOS tube and the sixth MOS tube are all turned off, and the third MOS tube and the fourth MOS tube are switched on at a preset frequency, such as 125KHz or 134.2KHz. , turn off, to realize the driving of the 125K coil; the gating switch needs to be switched to the low-frequency RFID antenna path.
- a preset frequency such as 125KHz or 134.2KHz.
- 4125K low-frequency RFID card simulation mode When the proximity to the card reader is detected, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit", and finally realizes the sending of the card number.
- Method 2 using the first MOS transistor and the fourth MOS transistor to conduct simultaneously to realize the current path;
- the above-mentioned method 1 or 2 can make the RFID coil form a current or disconnect it from forming a current, so as to realize the change of the load formed on the primary coil (that is, the coil of the card reader) and realize data transmission.
- the first MOS transistor and the fourth MOS transistor may be turned on to form a current to implement load pumping.
- Embodiment 2 The wireless charging IC is shared, and the wireless charging coil and the RFID coil are partially shared.
- the device is similar to the first embodiment, and also has four working modes, the difference lies in its special antenna design and the addition of a first switch to control the grounding of the RFID antenna to reduce the impact.
- the wireless charging antenna and the RFID antenna are partly shared, which is a hybrid antenna technology, as shown in FIG. 4 .
- the coil has three taps, which are the dual-antenna common drive end, WPC end, and RFID end.
- the dual-antenna common drive end is connected to the first half-bridge drive circuit of the wireless charging IC.
- the WPC end is the middle tap of the coil, which is connected to the wireless charging resonance capacitor.
- the second half-bridge drive circuit; the RFID end is the end of the hybrid coil, which has the highest inductance value, and is grounded by the first switch plus a resonant capacitor.
- This design is similar to Embodiment 1, but the coil nesting design makes it partly shared, that is, only a part of the coil is used in wireless charging, and the entire coil is used in RFID communication.
- the device has four working modes, which are:
- the wireless charging antenna senses the voltage to wake up the wireless charging IC, and the wireless charging IC realizes load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to realize charging.
- MOS tube switching instructions the first MOS tube is turned off (because there is no need for 125K card simulation), the first switch is turned off (to avoid simultaneous resonance of dual coils affecting the wireless charging function), the second MOS tube is turned on or off regularly off (necessary for the wireless charging protocol communication function), the third MOS tube to the sixth MOS tube are regularly turned on and off at the carrier frequency to realize the full-bridge rectification effect and realize wireless charging.
- the coil drive circuit drives the wireless charging antenna to oscillate and emit energy, and the corresponding receiving device extracts energy through load modulation, so that the oscillation voltage of the transmitting coil changes.
- the "envelope detection circuit” and “internal solution Modulation circuit” realizes the demodulation of the load modulation signal and then sends the corresponding power according to the needs of the other party.
- MOS tube switching instructions the first MOS tube is turned off (because there is no need to perform 125K card simulation), the first switch is turned off (to avoid simultaneous resonance of dual coils affecting the wireless charging function), and the strobe switch at the front end of the envelope detection circuit is switched to In the wireless charging path, the second MOS tube is turned off (not required by the wireless charging transmitter), and the third MOS tube to the sixth MOS tube are regularly turned on and off at the carrier frequency to drive the coil to realize reverse wireless charging; The pass switch control needs to switch the pass switch to the wireless charging path to realize data reception.
- 3125K low-frequency RFID card reading mode Similar to the above-mentioned 2reverse wireless charging mode, the coil drive circuit drives the 125K low-frequency RFID antenna to oscillate, and the RFID card tag gets energy to start when it is close to the coil, and extracts energy through load modulation to make the coil at the transmitting end oscillate The voltage changes. At this time, the "envelope detection circuit” and “internal demodulation circuit” realize the demodulation of the load modulation signal, and then know the card number information of the approaching RFID card tag.
- MOS tube switching instructions the first MOS, the second MOS tube, the fifth MOS tube and the sixth MOS tube are all turned off, the first switch is turned on, and the third MOS tube and the fourth MOS tube are switched on and off at a frequency of about 125KHz , realize the driving of the 125K coil and switch the gate switch of the envelope detection front end to the 125K channel to realize the card reading function; here, the gate switch control needs to switch the gate switch to the RFID channel to realize data reception.
- 4125K low-frequency RFID card simulation mode When the proximity to the card reader is detected, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit", and finally realizes the sending of the card number.
- method 1 using the first MOS transistor and the fourth MOS transistor to conduct the current to realize pumping
- method 2 using the first MOS transistor and the first switch to conduct Create a current draw
- Mode 3 use the first MOS transistor, the fourth MOS transistor, and the first switch to conduct to form a current pump.
- the conduction of the above three methods can control whether the current is formed on the coil, that is, the load change is formed on the transmitting primary coil, that is, the coil of the access control device or the card reader, and the data transmission is realized; except for the above-mentioned tubes, other switches , such as the MOS tube and/or the first switch should be in the off state to avoid influence.
- Embodiment 3 dual-coil antenna design.
- the device is similar to the first embodiment, the main changes are as follows:
- the first antenna is completely independent from the second antenna and must be laid out separately;
- Embodiment 1 Compared with Embodiment 1, a first switch for whether the second antenna resonant capacitor is grounded is added, so that independent control of whether the two coils resonate can be realized.
- the device has multiple working modes, namely:
- the wireless charging antenna senses the voltage to wake up the wireless charging IC, and the wireless charging IC realizes load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to realize charging.
- the tube 4 and the second MOS tube are turned on or off at the same time to form a load modulation and notify the other party what is needed charging power, and then start to receive energy; when receiving energy, the third MOS transistor to the sixth MOS transistor are periodically turned on to perform energy reception.
- the fifth MOS tube and the sixth MOS tube are turned off first to avoid the interference of the first antenna; the first MOS tube and the first switch are turned on or off at the same time to form load modulation (similarly The first MOS tube and the fourth MOS tube can be turned on and off at the same time), and notify the other party of the required power.
- the third MOS tube and the fourth MOS tube are intermittently turned on and off, so that For energy reception, when the third MOS transistor is turned on, the first switch is turned on.
- the wireless charging antenna senses the voltage to wake up the wireless charging IC, and the wireless charging IC realizes load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to realize charging.
- MOS tube switching description the first switch is turned on (to realize the second antenna resonance), one of the first MOS tube or the second MOS tube is regularly turned on or off (required for the wireless charging protocol communication function), the third MOS tube
- the tubes to the sixth MOS tubes are regularly turned on and off at the carrier frequency to realize the full-bridge rectification effect and realize wireless charging.
- the coil drive circuit drives the wireless charging antenna to oscillate and emit energy, and the corresponding receiving device extracts energy through load modulation, so that the oscillation voltage of the transmitting coil changes.
- the "envelope detection circuit” and " The “internal demodulation circuit” realizes the demodulation of the load modulation signal and then sends the corresponding power according to the needs of the other party.
- the first antenna or the second antenna can be used alone for reverse wireless charging.
- the first MOS transistor, the second MOS transistor and the first switch are turned off, the gate switch is switched to the first antenna, and the third MOS transistor to the sixth MOS transistor drive the first antenna to oscillate.
- the power can be adjusted by adjusting the duty cycle of the third MOS tube to the sixth MOS tube to realize reverse wireless charging.
- the first MOS tube, the second MOS tube, the fifth MOS tube and the sixth MOS tube are turned off to avoid the influence of the first antenna; the gate switch is switched to the second antenna, the third MOS tube and the fourth MOS tube
- the indirect conduction of the MOS tube forms the drive.
- the transmission power can be adjusted by adjusting the conduction duty cycle of the third MOS tube and the fourth MOS tube to realize wireless charging transmission.
- the third MOS tube When the tube is turned on, the first switch is turned on.
- the coil drive circuit drives the wireless charging antenna to oscillate and emit energy, and the corresponding receiving device extracts energy through load modulation, so that the oscillation voltage of the transmitting coil changes.
- the "envelope detection circuit” and " The “internal demodulation circuit” realizes the demodulation of the load modulation signal and then sends the corresponding power according to the needs of the other party.
- the receiving device can be a single wireless charging receiving device with double coils or two wireless charging receiving devices with single coils.
- 5125K low-frequency RFID card reading mode Similar to the aforementioned reverse wireless charging mode, the coil drive circuit drives the antenna to oscillate, and the RFID card tag gets energy to start when it is close to the coil, and extracts energy through load modulation, so that the oscillation voltage of the transmitter coil changes.
- the "envelope detection circuit” and “internal demodulation circuit” realize the demodulation of the load modulation signal, the card number information of the approaching RFID card tag is known.
- the card reading mode here can be divided into single antenna mode or dual antenna mode, as follows:
- the third MOS tube and the fourth MOS tube are indirectly turned on to drive the first coil, and the tube 6 is continuously turned on to realize the grounding of the resonant capacitor; the strobe switch needs to be switched to the first antenna end to realize Data reception; in addition, other MOS tubes and the first switch are in the off state to avoid interference.
- the second antenna card reading mode the third MOS tube and the fourth MOS tube are indirectly turned on to drive the second coil, the first switch is continuously turned on to realize the grounding of the resonant capacitor; the strobe switch needs to be switched to the second antenna end, Realize data reception; in addition, other MOS tubes are in the off state to avoid interference.
- Dual-antenna card reading mode the third MOS tube and the fourth MOS tube are indirectly turned on to drive the dual coil, the sixth MOS tube and the first switch are continuously turned on to realize the grounding of the resonant capacitor; the strobe switch needs to be polled and switched To the first and second antenna ends, to realize time-sharing data reception; other than that, other MOS tubes are in the off state to avoid interference.
- 6125K low-frequency RFID card simulation mode When the proximity to the card reader is detected, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit", and finally realizes the sending of the card number.
- the card emulation mode here can be divided into single antenna mode or dual antenna mode, as follows:
- Simulation mode of the first antenna card There are three methods: method 1, using the conduction of the second MOS transistor and the fourth MOS transistor to form a current to realize pumping; method 2: using the conduction of the fourth MOS transistor and the sixth MOS transistor to form Current pumping. Mode 3: use the conduction of the second MOS, the fourth MOS and the sixth MOS to form a current pump. In addition, other MOS transistors and the first switch should be in an off state.
- the second antenna card simulation mode There are three methods: method 1, using the conduction of the first MOS transistor and the fourth MOS transistor to form a current to realize pumping; method 2: using the fourth MOS transistor and the first switch to conduct current to form a current pumping. Mode 3: use the first MOS, the fourth MOS transistor, and the first switch to turn on to form a current pump. In addition, other MOS should be in off state.
- Dual antenna card reading simulation mode the indirect conduction of the first MOS tube, the second MOS tube and the fourth MOS tube realizes the formation of the current loop of the first coil and the second coil, and realizes the pumping of the coil of the access control device, which can realize The sending of the card number; other than this, other MOS should be shut down.
- the above functional modes can be performed simultaneously in single or multiple combinations; at the same time, different capacitance values can be configured on the resonant capacitors of the first antenna and the second antenna to achieve different resonant frequencies to support wireless charging technologies and standards of multiple frequencies;
- the modulation load capacitor can be replaced by a single or a combination of multiple capacitors, or even a resistor, to achieve a more effective effect.
- Embodiment 4 the wireless charging IC is shared, and the antenna is completely shared.
- the wireless charging IC, antenna and other hardware are shared, and one load modulation capacitor is reserved as the dedicated capacitor path for RFID load modulation.
- the first half-bridge drive circuit (the third MOS transistor and the fourth MOS transistor) is connected to the COM terminal of the antenna;
- the second half-bridge drive circuit (the fifth MOS tube and the sixth MOS tube) is connected to the other end of the antenna by connecting the resonant capacitor, wherein the resonant capacitor can be formed by one or more combinations;
- the first load modulation circuit (i.e. the first MOS transistor) is connected to the two ends of the antenna through a capacitor;
- the second load modulation circuit (that is, the second MOS transistor) is connected to the two ends of the antenna through a capacitor.
- the device has four working modes, namely:
- the wireless charging antenna senses the voltage to wake up the wireless charging IC, and the wireless charging IC realizes load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to realize charging.
- MOS tube switching instructions the first MOS tube is turned off (because there is no need for 125K card simulation), the second MOS tube is regularly turned on or off (required for the wireless charging protocol communication function), the third MOS tube to the sixth The MOS tube is regularly turned on and off at the carrier frequency to realize the full-bridge rectification effect and realize wireless charging.
- the coil drive circuit drives the wireless charging antenna to oscillate and emit energy, and the corresponding receiving device extracts energy through load modulation, so that the oscillation voltage of the transmitting coil changes.
- the "envelope detection circuit” and “internal solution Modulation circuit” realizes the demodulation of the load modulation signal and then sends the corresponding power according to the needs of the other party.
- MOS tube switching instructions the first MOS tube is turned off (because there is no need for 125K card simulation), the second MOS tube is turned off (the wireless charging transmitter does not need it), the third MOS tube to the sixth MOS tube are regularly conducted at the carrier frequency Turn on and off to drive the coil to realize reverse wireless charging.
- 3125K low-frequency RFID card reading mode Similar to the above-mentioned 2reverse wireless charging mode, the coil drive circuit drives the 125K low-frequency RFID antenna to oscillate, and the RFID card tag gets energy to start when it is close to the coil, and extracts energy through load modulation to make the coil at the transmitting end oscillate The voltage changes. At this time, the "envelope detection circuit” and “internal demodulation circuit” realize the demodulation of the load modulation signal, and then know the card number information of the approaching RFID card tag.
- MOS tube switching instructions the first MOS tube, the second MOS tube and the fifth MOS tube are all turned off, the sixth MOS tube is turned on, and the third MOS tube and the fourth MOS tube are switched on and off at a frequency of about 125KHz to realize Coil drive.
- 4125K low-frequency RFID card simulation mode When the proximity to the card reader is detected, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit", and finally realizes the sending of the card number.
- Method 1 using the conduction of the first MOS transistor and the fourth MOS transistor to form a current to realize load pumping
- method 2 using the conduction of the second MOS transistor and the fourth MOS transistor to form a current to realize load pumping
- Mode 3 use the fourth MOS transistor and the sixth MOS transistor to turn on to form a current pump.
- Method 4 use the conduction of the first MOS transistor, the second MOS transistor, the fourth MOS transistor and the sixth MOS transistor to form a current pump.
- the antenna volume can be minimized and the cost optimized
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Abstract
Description
Claims (15)
- 一种电子设备,包括无线充电电路、天线模组和匹配电路;所述匹配电路包括第一谐振电容、第一负载调制电容、第二负载调制电容和包络检波电路;所述无线充电电路包括微控制单元、解调电路、H桥驱动电路、第一负载调制电路和第二负载调制电路;其中:所述H桥驱动电路包括第一半桥驱动电路和第二半桥驱动电路,所述第一半桥驱动电路和所述第二半桥驱动电路的第一端均与电源端电连接,第二端均接地,所述第一半桥驱动电路依次经所述天线模组和所述第一谐振电容,与所述第二半桥驱动电路电连接,所述H桥驱动电路用于驱动所述天线模组在无线充电发射模式、无线充电接收模式、RFID读卡模式或RFID卡模拟模式下工作;所述第一负载调制电路经所述第一负载调制电容分别与所述天线模组和所述包络检波电路电连接,所述第二负载调制电路经所述第二负载调制电容分别与所述天线模组、所述第一谐振电容和所述包络检波电路电连接;所述包络检波电路还与所述解调电路电连接;所述微控制单元分别与所述解调电路、所述第一负载调制电路、所述第二负载调制电路、所述第一半桥驱动电路和所述第二半桥驱动电路电连接。
- 根据权利要求1所述的电子设备,其中,所述天线模组包括射频识别RFID线圈和无线充电线圈;所述匹配电路还包括选通开关和第二谐振电容;其中:所述第二谐振电容的第一端经所述第一负载调制电容与所述第一负载调制电路电连接,所述第二谐振电容的第二端接地;所述选通开关分别与第一点、第二点、所述包络检波电路以及所述微控制单元电连接,所述第一点为所述第一谐振电容与所述无线充电天线的第二端之间的公共点,所述第二点为所述第一负载调制电容与所述第二谐振电容之间的公共点;所述RFID线圈的第一端与所述第一半桥驱动电路电连接,所述RFID线圈的第二端与所述第二点电连接;所述无线充电线圈的第一端与所述第一半桥驱动电路电连接,所述无线充电线圈的第二端经所述第一谐振电容与所述第二半桥驱动电路电连接;所述第二负载调制电路经所述第二负载调制电容与所述第一点电连接。
- 根据权利要求1所述的电子设备,其中,所述天线模组包括第一线圈,所述第一线圈包括驱动公共端、无线充电WPC端和RFID端,所述WPC端位于所述驱动公共端和所述RFID端之间;所述匹配电路还包括选通开关、第二谐振电容和第一开关;其中:所述第二谐振电容的第一端经所述第一负载调制电容与所述第一负载调制电路电连接,所述第二谐振电容的第二端经所述第一开关接地;所述选通开关分别与第一点、第二点、所述包络检波电路以及所述微控制单元电连接,所述第一点为所述第一谐振电容与所述WPC端之间的公共点,所述第二点为所述第二谐振电容与所述第一负载调制电容之间的公共点;所述驱动公共端与所述第一半桥驱动电路电连接,所述WPC端经所述第一谐振电容与所述第二半桥驱动电路电连接,所述RFID端与所述第二点电连接;所述第二负载调制电路经所述第二负载调制电容与所述第一点电连接。
- 根据权利要求1所述的电子设备,其中,所述天线模组包括第二线圈和第三线圈;所述匹配电路还包括选通开关、第二谐振电容和第一开关;其中:所述第二谐振电容的第一端经所述第一负载调制电容与所述第一负载调制电路电连接,所述第二谐振电容的第二端经所述第一开关接地;所述选通开关分别与第一点、第二点、所述包络检波电路以及所述微控制单元电连接,所述第一点为所述第一谐振电容与所述第二线圈的第二端之间的公共点,所述第二点为所述第二谐振电容与所述第一负载调制电容之间的公共点;所述第二线圈的第一端与所述第一半桥驱动电路电连接,所述第二线圈的第二端经所述第一谐振电容与所述第二半桥驱动电路电连接;所述第三线圈的第一端与所述第一半桥驱动电路电连接,所述第三线圈的第二端与所述第二点电连接;所述第二负载调制电路经所述第二负载调制电容与所述第一点电连接。
- 根据权利要求1所述的电子设备,其中,所述天线模组包括第四线圈; 其中:所述第四线圈的第一端经所述第一谐振电容与所述第二半桥驱动电路电连接,所述第四线圈的第二端与所述第一半桥驱动电路电连接;所述包络检波电路与第一点电连接,所述第一点为所述第一谐振电容与所述第四线圈的第一端之间的公共点;所述第一负载调制电路经所述第一负载调制电容与所述第一点电连接;所述第二负载调制电路经所述第二负载调制电容与所述第一点电连接。
- 根据权利要求1至5中任一项所述的电子设备,其中,所述第一负载调制电路包括第一场效应MOS管,所述第二负载调制电路包括第二MOS管;其中:所述第一MOS管和所述第二MOS管为N型MOS管;所述第一MOS管的栅极与所述微控制单元电连接,所述第一MOS管的漏极与所述第一负载调制电容电连接,所述第一MOS管的源极接地;所述第二MOS管的栅极与所述微控制单元电连接,所述第二MOS管的漏极与所述第二负载调制电容电连接,所述第二MOS管的源极接地。
- 根据权利要求1至5中任一项所述的电子设备,其中,所述第一半桥驱动电路包括第三MOS管和第四MOS管,所述第二半桥驱动电路包括第五MOS管和第六MOS管;其中:所述第三MOS管和所述第五MOS管为P型MOS管,所述第四MOS管和所述第六MOS管为N型MOS管;所述第三MOS管、所述第四MOS管、所述第五MOS管和所述第六MOS管的栅极均与所述微控制单元电连接;所述第三MOS管和所述第五MOS管的源极均与电源端电连接;所述第三MOS管的漏极与所述第四MOS管的漏极电连接,所述第五MOS管的漏极与所述第六MOS管的漏极电连接;所述第四MOS管和所述第六MOS管的源极均接地;第三点和第四点均与所述天线模组电连接,所述第三点为所述第三MOS管的漏极与所述第四MOS管的漏极之间的公共点,所述第四点为所述第五MOS管的漏极与所述第六MOS管的漏极之间的公共点。
- 根据权利要求1至5中任一项所述的电子设备,其中,所述电子设备的工作模式包括:无线充电接收模式、无线充电发射模式、RFID读卡模式和RFID卡模拟模式。
- 根据权利要求1至5中任一项所述的电子设备,其中,所述包络检波电路和所述解调电路用于:确定所述天线模组的发射功率;确定RFID卡片 的卡号。
- 一种控制方法,应用于如权利要求1至9中任一项所述的电子设备,所述方法包括:确定所述电子设备所处的第一工作模式,所述第一工作模式为无线充电接收模式、无线充电发射模式、RFID读卡模式或RFID卡模拟模式;根据所述第一工作模式,控制所述电子设备的工作状态。
- 根据权利要求10所述的方法,其中,所述第一负载调制电路包括第一MOS管,所述第二负载调制电路包括第二MOS管;所述第一半桥驱动电路包括第三MOS管和第四MOS管,所述第二半桥驱动电路包括第五MOS管和第六MOS管。
- 根据权利要求11所述的方法,其中,所述第一工作模式为无线充电接收模式;所述根据所述第一工作模式,控制所述电子设备的工作状态,包括:在天线模组包括RFID线圈和无线充电线圈的情况下,关断所述第一MOS管,按照第一预设频率导通或关断所述第二MOS管,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管;在所述天线模组包括第一线圈的情况下,关断所述第一MOS管和第一开关,按照第一预设频率导通或关断所述第二MOS管,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管;在所述天线模组包括第二线圈和第三线圈的情况下,关断所述第一MOS管和所述第一开关,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管,控制所述第二MOS管的工作状态与所述第四MOS管的工作状态相同;或者,关断所述第五MOS管和所述第六MOS管,按照第二预设频率交替导通和关断所述第三MOS管和所述第四MOS管,在所述第三MOS管导通时控制所述第一开关导通,控制所述第一MOS管的工作状态与所述第四MOS管或所述第一开关的工作状态相同;或者,导通所述第一开关,按照第一预设频率导通或关断第三目标MOS管,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管;在所述天线模组包括第四线圈的情况下,关断所述第一MOS管,按照第 一预设频率导通或关断所述第二MOS管,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管;其中,所述第一目标MOS管包括所述第三MOS管和所述第六MOS管,所述第二目标MOS管包括所述第四MOS管和所述第五MOS管;所述第三目标MOS管为所述第一MOS管或所述第二MOS管。
- 根据权利要求11所述的方法,其中,所述第一工作模式为无线充电发送模式;所述根据所述第一工作模式,控制所述电子设备的工作状态,包括:在天线模组包括RFID线圈和无线充电线圈的情况下,关断所述第一MOS管和所述第二MOS管,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管,控制选通开关导通包络检波电路和第一点;在所述天线模组包括第一线圈的情况下,关断所述第一MOS管、所述第二MOS管和第一开关,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管,控制所述选通开关导通所述包络检波电路和所述第一点;在所述天线模组包括第二线圈和第三线圈的情况下,关断所述第一MOS管、所述第二MOS管和所述第一开关,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管,控制所述选通开关导通所述包络检波电路和所述第一点;或者,关断所述第一MOS管、所述第二MOS管、所述第五MOS管和所述第六MOS管,按照第二预设频率交替导通和关断第三MOS管和第四MOS管,在所述第三MOS管导通时控制所述第一开关导通,控制所述选通开关导通所述包络检波电路和第二点;或者,关断所述第一MOS管和所述第二MOS管,导通所述第一开关,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管,控制所述选通开关交替导通所述包络检波电路和所述第一点或所述第二点;在所述天线模组包括第四线圈的情况下,关断所述第一MOS管和所述第二MOS管,按照第二预设频率交替导通和关断第一目标MOS管和第二目标MOS管;其中,所述第一目标MOS管包括所述第三MOS管和所述第六MOS管, 所述第二目标MOS管包括所述第四MOS管和所述第五MOS管。
- 根据权利要求11所述的方法,其中,所述第一工作模式为RFID读卡模式;所述根据所述第一工作模式,控制所述电子设备的工作状态,包括:在天线模组包括RFID线圈和无线充电线圈的情况下,关断所述第一MOS管、所述第二MOS管、所述第五MOS管和所述第六MOS管,按照第二预设频率交替导通和关断第三MOS管和第四MOS管;在所述天线模组包括第一线圈的情况下,关断所述第一MOS管、所述第二MOS管、所述第五MOS管和所述第六MOS管,导通所述第一开关,按照第二预设频率交替导通和关断第三MOS管和第四MOS管,控制选通开关导通包络检波电路和第二点;在所述天线模组包括第二线圈和第三线圈的情况下,关断所述第一MOS管、所述第二MOS管、所述第五MOS管和所述第一开关,导通所述第六MOS管,按照第二预设频率交替导通和关断第三MOS管和第四MOS管,控制所述选通开关导通所述包络检波电路和第一点;或者,关断所述第一MOS管、所述第二MOS管、所述第五MOS管和所述第六MOS管,导通所述第一开关,按照第二预设频率交替导通和关断第三MOS管和第四MOS管,控制所述选通开关导通所述包络检波电路和所述第二点;或者,按照第二预设频率交替导通和关断第三MOS管和第四MOS管,导通所述第六MOS管和所述第一开关,关断所述第一MOS管、所述第二MOS管和所述第五MOS管,控制所述选通开关交替导通所述包络检波电路和所述第一点或所述第二点;在所述天线模组包括第四线圈的情况下,关断所述第一MOS管、所述第二MOS管和所述第五MOS管,导通所述第六MOS管,按照第二预设频率交替导通和关断第三MOS管和第四MOS管。
- 根据权利要求11所述的方法,其中,所述第一工作模式为RFID卡模拟模式;所述根据所述第一工作模式,控制所述电子设备的工作状态,包括:在天线模组包括RFID线圈和无线充电线圈的情况下,按照第三预设频率交替导通或关断所述第一MOS管和所述第四MOS管,关断其他MOS管;或者,保持第一MOS管导通,按照第三预设频率交替导通或关断所述第四MOS管,关断其他MOS管;或者,保持第四MOS管导通,按照第三预设频率交替导通或关断所述第一MOS管,关断其他MOS管;在所述天线模组包括第一线圈的情况下,按照第三预设频率交替导通或关断所述第一MOS管和所述第四MOS管,关断其他MOS管和第一开关;或者,按照第三预设频率交替导通或关断第四开关和所述第一开关,关断其他MOS管;或者,按照第三预设频率交替导通或关断所述第一MOS管、所述第四MOS管和所述第一开关,关断其他MOS管;在所述天线模组包括第二线圈和第三线圈的情况下,按照第三预设频率交替导通和关断所述第二MOS管和第四MOS管,关断其他MOS管和所述第一开关;或者,按照第三预设频率交替导通和关断所述第四MOS管和第六MOS管,关断其他MOS管和所述第一开关;或者,按照第三预设频率交替导通和关断所述第二MOS管、所述第四MOS管和第六MOS管,关断其他MOS管和所述第一开关;或者,按照第三预设频率交替导通或关断所述第一MOS管和所述第四MOS管,关断其他MOS管和所述第一开关;或者,按照第三预设频率交替导通或关断所述第四开关和所述第一开关,关断其他MOS管;或者,按照第三预设频率交替导通或关断所述第一MOS管、所述第四MOS管和所述第一开关,关断其他MOS管;或者,按照第三预设频率交替导通和关断所述第一MOS管、第二MOS管和第四MOS管,关断其他MOS管和所述第一开关;在所述天线模组包括第四线圈的情况下,按照第三预设频率交替导通和关断所述第一MOS管和所述第四MOS管,关断其他MOS管;或者,按照第三预设频率交替导通和关断所述第二MOS管和所述第六MOS管,关断其他MOS管;或者,按照第三预设频率交替导通和关断所述第四MOS管和所述第六MOS管,关断其他MOS管;或者,第三预设频率交替导通和关断所述第一MOS管、所述第二MOS管、所述第四MOS管和所述第六MOS管, 关断其他MOS管。
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2024
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Also Published As
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| EP4404100A4 (en) | 2025-03-26 |
| CN113780501B (zh) | 2025-02-18 |
| EP4404100B1 (en) | 2026-01-21 |
| EP4404100A1 (en) | 2024-07-24 |
| CN113780501A (zh) | 2021-12-10 |
| US20240220748A1 (en) | 2024-07-04 |
| US12511505B2 (en) | 2025-12-30 |
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