WO2025201214A1 - Circuit intégré, dispositif électronique et système de communication - Google Patents

Circuit intégré, dispositif électronique et système de communication

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Publication number
WO2025201214A1
WO2025201214A1 PCT/CN2025/084211 CN2025084211W WO2025201214A1 WO 2025201214 A1 WO2025201214 A1 WO 2025201214A1 CN 2025084211 W CN2025084211 W CN 2025084211W WO 2025201214 A1 WO2025201214 A1 WO 2025201214A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupled
integrated circuit
processor
current
antenna
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/084211
Other languages
English (en)
Chinese (zh)
Inventor
陈杰
尹飞飞
李国峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2025201214A1 publication Critical patent/WO2025201214A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Definitions

  • the present application relates to the field of radio frequency identification technology, and in particular to an integrated circuit, an electronic device, and a communication system.
  • Proximity integrated circuits are used for contactless data transmission and identification, enabling communication with proximity coupling devices (PCDs).
  • a PCD consists of a coupled antenna and processor. When the processor performs periodic operations, it generates a periodically varying current, and the antenna transmits an electromagnetic wave signal corresponding to this current. When the antenna in the PCD receives this electromagnetic wave signal, it generates electromagnetic interference (EMD) in the PCD, causing it to misreceive data or transmit data incorrectly.
  • EMD electromagnetic interference
  • the present invention adopts the following technical solutions:
  • an integrated circuit which includes a rectifier bridge, a DC current limiter and a first processor.
  • the two input ends of the rectifier bridge are used to couple with the two ends of the antenna, the positive output end of the rectifier bridge is coupled with the input end of the DC current limiter, the negative output end of the rectifier bridge and the output end of the DC current limiter are coupled with the analog ground end, the power supply end of the first processor is coupled with the input end of the DC current limiter, and the ground end of the first processor is coupled with the output end of the DC current limiter.
  • the rectifier bridge is used to rectify the alternating current received by the antenna into direct current to provide power to the first processor
  • the DC current limiter is used to limit the direct current output by the rectifier bridge
  • the first processor is used to perform periodic operations.
  • the current output from the positive output end of the rectifier bridge is the sum of the current output by the first processor and the discharge current output by the DC current limiter.
  • the DC current limiter is used to limit the DC power output by the rectifier bridge.
  • the discharge current output by the DC current limiter increases.
  • the discharge current output by the DC current limiter decreases. This maintains a stable current output from the positive output end of the rectifier bridge, and the current flowing through the antenna will also remain stable.
  • the antenna sends an electromagnetic wave signal corresponding to the current, the intensity of the electromagnetic wave signal will be weak, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to adjacent coupling devices.
  • a DC current limiter includes a first resistor, a second resistor, and a first transistor. A first end of the first resistor and a first end of the first transistor are coupled to an input end of the DC current limiter, a second end of the first resistor is coupled to a gate end of the first transistor, a first end of the second resistor is coupled to a second end of the first resistor, and a second end of the second resistor and a second end of the first transistor are coupled to an output end of the DC current limiter.
  • the current output by the first processor is filtered by a capacitor, thereby further reducing the fluctuation of the output current at the positive output end of the rectifier bridge.
  • the current flowing through the antenna will also be more stable.
  • the antenna sends the electromagnetic wave signal corresponding to the current, the intensity of the electromagnetic wave signal will be weaker, thereby further avoiding the electromagnetic wave signal from causing electromagnetic interference to nearby coupled devices.
  • the limiter includes a first diode, a second diode, a third resistor, a second transistor, and a third transistor.
  • the anode of the first diode and the anode of the second diode are respectively coupled to the two input terminals of the limiter, and the cathode of the first diode is coupled to the cathode of the second diode.
  • One end of the third resistor is coupled to the cathode of the first diode, and the other end of the third resistor is coupled to the output terminal of the limiter.
  • the first processor continues to operate within a preset duration of each cycle.
  • the first processor will output a varying current within the preset duration, and the antenna will transmit an electromagnetic wave signal to the proximity-coupled device within the preset duration. Because the preset duration is less than the duration for the integrated circuit to transmit a complete data frame via the antenna, the proximity-coupled device cannot obtain a complete data frame based on the electromagnetic wave signal received within the preset duration and will discard the incomplete data frame. As a result, the electromagnetic wave signal will not generate electromagnetic interference on the proximity-coupled device.
  • a second aspect of an embodiment of the present application provides a control method for an integrated circuit, which is applied to an integrated circuit, wherein the integrated circuit includes a rectifier bridge and a first processor coupled to the rectifier bridge.
  • the method includes: the first processor continues to run within a preset duration of each cycle, and the preset duration is less than the duration for the integrated circuit to send a complete data frame through an antenna.
  • the integrated circuit may be an integrated circuit as described in the above-mentioned first aspect or any possible implementation manner of the first aspect.
  • the integrated circuit further includes a second processor coupled to the first processor.
  • the method further includes: the second processor sending a control signal to the first processor, the control signal being used to control the preset duration.
  • the type of the electronic device includes at least one of a proximity integrated circuit card, a mobile phone, a watch, a bracelet, or a car key.
  • the embodiment of the present application does not limit the specific type of the electronic device.
  • FIG1 is a schematic structural diagram of a proximity integrated circuit card
  • FIG2 is a schematic diagram of an integrated circuit application scenario provided by an embodiment of the present application.
  • FIG4 is a schematic diagram of the structure of another integrated circuit provided in an embodiment of the present application.
  • FIG5 is a frequency response diagram provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of the structure of another integrated circuit provided in an embodiment of the present application.
  • circuits or other components may be described or referred to as being “configured to” perform one or more tasks.
  • “configured to” is used to imply structure by indicating that the circuit/component includes structure (e.g., circuitry) that performs the one or more tasks during operation. Thus, even when a specified circuit/component is not currently operational (e.g., not turned on), the circuit/component may be referred to as being configured to perform the task.
  • Circuits/components used with the phrase “configured to” include hardware, such as circuitry that performs an operation, etc.
  • Proximity coupling device refers to a read/write device that uses inductive coupling to provide energy to a proximity card and control data exchange with the proximity card, such as a radio frequency identification (RFID) reader.
  • RFID radio frequency identification
  • Electromagnetic interference also known as electromagnetic disturbance, refers to various electromagnetic phenomena that may cause the performance of devices or equipment (systems) to degrade.
  • Low-dropout regulator Also known as low-dropout linear regulator or low-voltage dropout regulator, it is a linear DC regulator used to provide a stable DC voltage.
  • Public key encryption also known as asymmetric (key) encryption, refers to an encryption method consisting of a corresponding pair of unique keys (i.e., a public key and a private key).
  • MOSFET Metal-oxide-semiconductor field-effect transistor
  • FIG1 is a schematic diagram of the structure of a proximity integrated circuit card (PICC) 100.
  • the PICC 100 includes an antenna 110, a rectifier bridge (also called a rectifier) 120, a first capacitor 130, a low-dropout regulator 140, a second capacitor 150, a processor 160, and a limiter 170.
  • Antenna 110 is coupled to the two input terminals of rectifier bridge 120 at both ends, the positive output terminal of rectifier bridge 120 is coupled to one terminal of first capacitor 130 at the other end, and the negative output terminal of rectifier bridge 120 is coupled to analog ground (AGND).
  • the other terminal of first capacitor 130 is coupled to ground (GND).
  • a first terminal of low-dropout regulator 140 is coupled to the positive output terminal of rectifier bridge 120, a second terminal of low-dropout regulator 140 is coupled to an analog ground terminal, a third terminal of low-dropout regulator 140 and one terminal of second capacitor 150 are coupled to an input terminal of processor 160, and the other terminal of second capacitor 150 is coupled to ground.
  • Antenna 110 is also coupled to both ends of limiter 170.
  • the capacitance of the first capacitor 130 and the second capacitor 150 can be increased to filter the current output by the processor 160, thereby preventing the proximity integrated circuit card 100 from generating electromagnetic interference with the proximity coupling device 200.
  • the capacitance of the capacitor increases, the volume of the capacitor also increases, and large capacitors cannot be installed in the proximity integrated circuit card 100.
  • a voltage sensor, a clock stop frequency detector, and a clock stop frequency shifter (not shown in the drawings) coupled in series may be added between the processor 160 and the antenna 110 in the proximity integrated circuit card 100.
  • the voltage sensor is used to detect the voltage of the current generated when the processor 160 performs periodic operations.
  • the clock stop frequency detector is triggered to detect the frequency of the current and send the current frequency to the clock stop frequency shifter.
  • the clock stop frequency shifter is used to shift the frequency of the current to a frequency outside the response frequency of the proximity coupled device 200 when it is determined that the current will cause electromagnetic interference to the proximity coupled device 200 based on the frequency of the current. This prevents the electromagnetic wave signal corresponding to the current from causing electromagnetic interference to the proximity coupled device 200 when the antenna 110 transmits the electromagnetic wave signal.
  • the proximity integrated circuit card 100 obtains energy through the coupling between the antenna 110 and the antenna 210.
  • the proximity integrated circuit card 100 is a contactless power supply system.
  • the voltage value of the current generated when the processor 160 performs periodic operations is relatively small.
  • a voltage sensor is used to detect the voltage of the current output by the processor 160, which places high requirements on the detection sensitivity of the voltage sensor.
  • the detection sensitivity of the existing voltage sensor cannot meet the requirements.
  • an embodiment of the present application provides an integrated circuit that can be used in a proximity integrated circuit card.
  • the integrated circuit maintains a stable current output at the positive output end of the rectifier bridge through a DC current limiter to reduce the fluctuation of the current flowing through the antenna.
  • the antenna sends an electromagnetic wave signal corresponding to the current, the intensity of the electromagnetic wave signal will be weak, thereby preventing the proximity integrated circuit card from generating electromagnetic interference on nearby coupling devices.
  • the integrated circuit 300 may be applied to an electronic device 400 and coupled to an antenna 410 in the electronic device 400 .
  • the integrated circuit 300 may communicate with the proximity-coupled device 200 and obtain energy through the antenna 410 .
  • an example in which the integrated circuit 300 is applied to the electronic device 400 and the electronic device 400 is used to communicate with the proximity-coupled device 200 is used for illustrative description.
  • the type of the proximity integrated circuit card may include at least one of a bank card, an ID card, a room card or a passport.
  • the embodiment of the present application does not limit the specific type of the proximity integrated circuit card.
  • FIG3 is a schematic diagram of the structure of an integrated circuit 300 provided in an embodiment of the present application.
  • the integrated circuit 300 includes a rectifier bridge 310, a DC current limiter 320, and a first processor 330.
  • the two input terminals of the rectifier bridge 310 are coupled to the two ends of the antenna 410.
  • the positive output terminal of the rectifier bridge 310 is coupled to the input terminal of the DC current limiter 320.
  • the negative output terminal of the rectifier bridge 310 and the output terminal of the DC current limiter 320 are coupled to the analog ground terminal.
  • the power terminal (also known as the voltage drain drain (VDD) terminal) of the first processor 330 is coupled to the input terminal of the DC current limiter 320.
  • the ground terminal (also known as the voltage source sink (VSS) terminal) of the first processor 330 is coupled to the output terminal of the DC current limiter 320.
  • VDD voltage drain drain
  • VSS voltage source sink
  • Antenna 410 is configured to couple with antenna 210 in proximity coupling device 200 to obtain data and AC energy transmitted by antenna 210.
  • Rectifier bridge 310 is configured to rectify the AC power generated by antenna 410 into DC power to power first processor 330.
  • DC current limiter 320 is configured to limit the DC power output from the positive output terminal of rectifier bridge 310.
  • First processor 330 is configured to perform periodic operations.
  • Ic represents the current output by the first processor 330
  • Idm represents the discharge current output by the DC current limiter 320 .
  • the voltage Vrec at the positive output of the rectifier bridge 310 will increase because the positive output terminal of the rectifier bridge 310 provides energy to the first processor 330 without sudden changes. This will increase the bleeder current Idm output by the DC current limiter 320, thus keeping the current Irec output by the positive output terminal of the rectifier bridge 310 stable. Consequently, the current Iant flowing through the antenna 410 will also remain stable.
  • the antenna 410 transmits an electromagnetic wave signal corresponding to the current Iant, the intensity of the electromagnetic wave signal will be relatively weak, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to the proximity-coupled device 200.
  • the voltage Vrec at the positive output of the rectifier bridge 310 will decrease because the positive output terminal of the rectifier bridge 310 provides energy to the first processor 330 without sudden changes. This will also reduce the bleeder current Idm output by the DC current limiter 320, thus keeping the current Irec output by the positive output terminal of the rectifier bridge 310 stable. Consequently, the current Iant flowing through the antenna 410 will also remain stable.
  • the antenna 410 transmits an electromagnetic wave signal corresponding to the current Iant, the intensity of the electromagnetic wave signal will be relatively weak, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to the proximity-coupled device 200.
  • the first processor 330 performing periodic operations includes the first processor 330 performing periodic public key encryption operations.
  • the current Ic output by the first processor 330 decreases.
  • the electronic device 400 is close to the proximity coupling device 200, or when the amount of tasks executed by the first processor 330 in the integrated circuit 300 increases, the current Ic output by the first processor 330 increases.
  • the DC current limiter 320 can maintain a stable current Irec outputted from the positive output end of the rectifier bridge 310, so that the current Iant flowing through the antenna 410 will also remain stable.
  • the antenna 410 transmits an electromagnetic wave signal corresponding to the current Iant flowing through the antenna 410, the intensity of the electromagnetic wave signal will be relatively weak, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to the adjacent coupling device 200.
  • the DC current limiter 320 includes a first resistor R1 , a second resistor R2 , and a first transistor MOS1 .
  • the transistor is a metal oxide semiconductor field effect transistor as an example for illustrative description.
  • a first end of the first resistor R1 and a first end of the first transistor MOS1 are coupled to an input end of the DC current limiter 320 , a second end of the first resistor R1 is coupled to a gate end of the first transistor MOS1 , a first end of the second resistor R2 is coupled to a second end of the first resistor R1 , and a second end of the second resistor R2 and a second end of the first transistor MOS1 are coupled to an output end of the DC current limiter 320 .
  • the voltage Vrec at the positive output of the rectifier bridge 310 will decrease because the positive output of the rectifier bridge 310 provides energy to the first processor 330 without sudden changes.
  • the resistance values of the first resistor R1 and the second resistor R2 in the DC current limiter 320 remain unchanged, the voltage at the gate of the first transistor MOS1 will decrease, and the discharge current Idm output by the first transistor MOS1 will decrease, which will keep the current Irec output by the positive output of the rectifier bridge 310 stable.
  • the current Iant flowing through the antenna 410 will also remain stable.
  • the antenna 410 transmits the electromagnetic wave signal corresponding to the current Iant, the intensity of the electromagnetic wave signal will be relatively weak, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to the proximity coupling device 200.
  • K is the amplitude of the sine wave corresponding to the output current Ic of the first processor 330
  • pi represents pi
  • fc is the fluctuation frequency of the output current when the first processor 330 operates periodically
  • t represents time.
  • the first end of the first resistor R1 and the second end of the second resistor R2 are coupled to a node L, and the voltage at the node is VL.
  • the first transistor MOS1 can be equivalent to a current source i and a resistor RM coupled in parallel.
  • V represents the voltage difference between the voltage VL at the node L and the analog ground terminal
  • gm represents the transconductance of the first transistor MOS1
  • pi represents pi
  • fc represents the fluctuation frequency of the output current when the first processor 330 is periodically running
  • t represents time.
  • the frequency information of the current Ic output by the first processor 330 is the same as the frequency information of the bleeder current Idm output by the DC current limiter 320.
  • the two currents change simultaneously and in opposite directions.
  • the bleeder current Idm output by the DC current limiter 320 decreases accordingly.
  • the bleeder current Idm output by the DC current limiter 320 increases accordingly. Therefore, during the change of the current Ic output by the first processor 330, the positive output terminal of the rectifier bridge 310 can maintain a stable current Irec, so that the current Iant flowing through the antenna 410 will also remain stable.
  • the antenna 410 transmits an electromagnetic wave signal corresponding to the current Iant, the intensity of the electromagnetic wave signal will be weak, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to the nearby coupling device 200.
  • the processor 160 in the proximity integrated circuit card 100 when the processor 160 in the proximity integrated circuit card 100 performs periodic operations and the operating frequency of the processor 160 is 13.56 MHz, the processor 160 outputs a periodically changing current, the antenna 110 transmits an electromagnetic wave signal corresponding to the current, and the proximity coupling device 200 receives an electromagnetic wave signal of 8.5 mV at 11.8 MHz and an electromagnetic wave signal of 8.2 mV at 15.2 MHz.
  • the first processor 330 in the integrated circuit 300 performs periodic operations at a frequency of 13.56 MHz, the first processor 330 outputs a periodically changing current. Since the DC current limiter 320 maintains a stable current Irec outputted from the positive output terminal of the rectifier bridge 310, the current Iant flowing through the antenna 410 also remains stable.
  • the proximity coupling device 200 receives an electromagnetic wave signal of 0.5 mV at 11.8 MHz and an electromagnetic wave signal of 0.6 mV at 15.2 MHz. It can be understood that when the integrated circuit 300 provided in the embodiment of the present application is applied to the electronic device 400, the amplitude of the electromagnetic wave signal sent by the antenna 410 is less than 0.7 mV.
  • the integrated circuit 300 Compared with the amplitude of the electromagnetic wave signal sent by the antenna 110 in the proximity integrated circuit card 100, which is greater than 8 mV, the integrated circuit 300 provided in the embodiment of the present application can effectively reduce the amplitude of the electromagnetic wave signal sent by the antenna 410, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to the proximity coupling device 200.
  • the rectifier bridge 310 includes four diodes Da to Dd, the cathode of diode Da and the cathode of diode Db are coupled to the positive output terminal of the rectifier bridge 310, the anode of diode Da and the cathode of diode Dc are coupled to one input terminal of the rectifier bridge 310, the anode of diode Db and the cathode of diode Dd are coupled to the other input terminal of the rectifier bridge 310, and the anode of diode Dc and the anode of diode Dd are coupled to the negative output terminal of the rectifier bridge 310.
  • the frequency information of the current Ic output by the first processor 330 is the same as the frequency information of the bleeder current Idm output by the DC current limiter 320.
  • the two currents change simultaneously and in opposite directions.
  • the bleeder current Idm output by the DC current limiter 320 decreases accordingly.
  • the bleeder current Idm output by the DC current limiter 320 increases accordingly. Therefore, during the change of the current Ic output by the first processor 330, the positive output terminal of the rectifier bridge 310 can maintain a stable current Irec, and thus the current Iant flowing through the antenna 410 will also remain stable.
  • the antenna 410 transmits an electromagnetic wave signal corresponding to the current Iant, the intensity of the electromagnetic wave signal will be relatively weak, thereby preventing the electromagnetic wave signal from causing electromagnetic interference to the adjacent coupling device 200.
  • the integrated circuit 300 further includes a capacitor C, a first end of the capacitor C being coupled to the input end of the DC current limiter 320, and a second end of the capacitor C being coupled to the output end of the DC current limiter 320.
  • the capacitor C is used to filter the current Ic output by the first processor 330, thereby further reducing fluctuations in the output current Irec at the positive output end of the rectifier bridge 310.
  • the current Iant flowing through the antenna 410 will also be more stable.
  • the antenna 410 transmits an electromagnetic wave signal corresponding to the current Iant, the intensity of the electromagnetic wave signal will be weaker, thereby further preventing the electromagnetic wave signal from causing electromagnetic interference to the adjacent coupling device 200.
  • the integrated circuit 300 provided in the embodiment of the present application filters the current Ic output by the first processor 330 through the capacitor C, thereby further reducing the fluctuation of the output current Irec at the positive output end of the rectifier bridge 310.
  • the current Iant flowing through the antenna 410 will also be more stable.
  • the antenna 410 transmits the electromagnetic wave signal corresponding to the current Iant, the intensity of the electromagnetic wave signal will be weaker, thereby further preventing the electromagnetic wave signal from causing electromagnetic interference to the adjacent coupling device 200.
  • the integrated circuit 300 further includes a limiter 340 , wherein two input terminals of the limiter 340 are coupled to two ends of the antenna 410 , and an output terminal of the limiter 340 is coupled to an analog ground terminal.
  • the limiter 340 is used to limit the voltage amplitude of the AC power generated after the antenna 410 receives AC energy, thereby protecting other components in the integrated circuit 300 and improving the reliability of the integrated circuit 300.
  • the first end of the second MOS transistor 2 and the first end of the third MOS transistor 3 are respectively coupled to the two input terminals of the limiter 340, the gate end of the second MOS transistor 2 and the gate end of the third MOS transistor 3 are coupled to the cathode of the first diode D1, and the second end of the second MOS transistor 2 and the second end of the third MOS transistor 3 are coupled to the output terminal of the limiter 340.
  • the limiter 340 can limit the AC power during both the positive and negative half-cycles of the AC power, thereby protecting the remaining components in the integrated circuit 300 and improving the reliability of the integrated circuit 300.
  • the integrated circuit 300 provided in the embodiment of the present application limits the voltage amplitude of the AC power generated by the antenna 410 after receiving AC energy through the limiter 340, thereby protecting the remaining components in the integrated circuit 300 and improving the reliability of the integrated circuit 300.
  • the integrated circuit 300 described above can reduce the strength of the electromagnetic wave signal transmitted by the antenna 410 when the current Ic output by the first processor 330 changes, if the proximity coupling device 200 is sensitive to electromagnetic wave signals, the electromagnetic wave signal transmitted by the antenna 410 may still cause electromagnetic interference to the proximity coupling device 200.
  • the integrated circuit 300 provided in this embodiment of the application limits the operating time of the first processor 330, thereby further reducing the possibility of the integrated circuit 300 generating electromagnetic interference to the proximity coupling device 200.
  • an incomplete data frame may be a data frame that is missing at least one byte compared to a complete data frame.
  • the embodiment of the present application does not limit the specific lengths of the complete data frame and the incomplete data frame.
  • an incomplete data frame that is missing one byte compared to a complete data frame is used as an example for illustrative explanation.
  • an incomplete data frame may be a data frame including 3 bytes.
  • the non-preset duration is greater than or equal to the duration for the integrated circuit 300 to send a byte through the antenna 410.
  • the embodiments of the present application do not limit this.
  • the non-preset duration is equal to the duration for the integrated circuit 300 to send a byte through the antenna 410 as an example for illustrative explanation.
  • the antenna 410 will transmit an electromagnetic wave signal to the proximity coupling device 200 within the preset duration and will not transmit an electromagnetic wave signal to the proximity coupling device 200 within the non-preset duration. Because the preset duration is equal to the duration of an incomplete data frame sent by the integrated circuit 300 via the antenna 410, the incomplete data frame is missing the fourth byte B3. Therefore, the proximity coupling device 200 cannot obtain a complete data frame based on the electromagnetic wave signal received within the preset duration. Instead, it obtains an incomplete data frame missing the fourth byte B3. The incomplete data frame fails verification, and the proximity coupling device 200 discards the incomplete data frame. As a result, the electromagnetic wave signal does not generate electromagnetic interference on the proximity coupling device 200.
  • a dummy operator can be inserted into the first processor 330 so that the first processor 330 operates at low power consumption within a non-preset time period, thereby ensuring that the first processor 330 does not output fluctuating current within a non-preset time period.
  • the integrated circuit 300 provided in the embodiment of the present application limits the operating time of the first processor 330, so that the first processor 330 continuously operates within a preset duration in each cycle.
  • the first processor 330 outputs a varying current within the preset duration, and the antenna 410 transmits an electromagnetic wave signal to the proximity-coupled device 200 within the preset duration. Because the preset duration is shorter than the duration for the integrated circuit 300 to transmit a complete data frame via the antenna 410, the proximity-coupled device 200 cannot obtain a complete data frame from the electromagnetic wave signal received within the preset duration and discards the incomplete data frame. As a result, the electromagnetic wave signal does not cause electromagnetic interference to the proximity-coupled device 200.
  • the integrated circuit 300 may further include a second processor 350 coupled to the first processor 330.
  • the second processor 350 is configured to send a control signal to the first processor 330, where the control signal is used to control the preset duration.
  • the second processor 350 may include a timer (TIM).
  • TIM timer
  • the second processor 350 When detecting that the first processor 330 starts running, the second processor 350 starts the timer. When the timer reaches a preset duration, the timer triggers the second processor 350 to generate an interrupt.
  • the second processor 350 sends a control signal to the first processor 330, which controls the first processor 330 to stop running through the control signal, thereby controlling the preset duration of the first processor 330's operation.
  • the second processor 350 may be a central processing unit.
  • the second processor sends a control signal to the first processor 330, which is used to control a preset duration.
  • the first processor 330 continues to operate within the preset duration of each cycle, outputs a varying current within the preset duration, and the antenna 410 transmits an electromagnetic wave signal to the proximity coupling device 200 within the preset duration.
  • the preset duration is less than the duration for the integrated circuit 300 to transmit a complete data frame via the antenna 410. If the proximity coupling device 200 cannot obtain a complete data frame based on the electromagnetic wave signal received within the preset duration, the incomplete data frame will be discarded, thereby preventing the electromagnetic wave signal from generating electromagnetic interference with the proximity coupling device 200.
  • the type of the electronic device 400 may include at least one of a proximity integrated circuit card, a mobile phone, a watch, a bracelet, or a car key.
  • the embodiment of the present application does not limit the specific type of the electronic device 400.
  • an embodiment of the present application further provides a communication system, which may be the communication system 500 shown in FIG2 .
  • the communication system 500 includes a proximity coupling device 200 and an electronic device 400 coupled to and communicating with the proximity coupling device 200.
  • the structure of the electronic device 400 is the structure of the electronic device 400 shown in any of FIG2 to FIG4 and FIG6 .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

Des modes de réalisation de la présente demande divulguent un circuit intégré, un dispositif électronique et un système de communication, qui résolvent le problème d'un circuit intégré de proximité provoquant une perturbation électromagnétique dans un dispositif de couplage de proximité. La solution spécifique consiste à fournir un circuit intégré, le circuit intégré comprenant un redresseur en pont, un limiteur de courant continu et un premier processeur. Deux extrémités d'entrée du redresseur en pont sont utilisées pour être couplées à deux extrémités d'une antenne, et une extrémité de sortie positive du redresseur en pont est couplée à une extrémité d'entrée du limiteur de courant continu. Une extrémité de sortie négative du redresseur en pont et une extrémité de sortie du limiteur de courant continu sont couplées à une extrémité de mise à la terre analogique. Une extrémité d'alimentation électrique du premier processeur est couplée à l'extrémité d'entrée du limiteur de courant continu, et une extrémité de mise à la terre du premier processeur est couplée à l'extrémité de sortie du limiteur de courant continu.
PCT/CN2025/084211 2024-03-26 2025-03-21 Circuit intégré, dispositif électronique et système de communication Pending WO2025201214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202410359367.6 2024-03-26
CN202410359367.6A CN120710535A (zh) 2024-03-26 2024-03-26 一种集成电路、电子设备和通信系统

Publications (1)

Publication Number Publication Date
WO2025201214A1 true WO2025201214A1 (fr) 2025-10-02

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110875759A (zh) * 2018-08-31 2020-03-10 意法半导体(鲁塞)公司 Nfc设备的频率调整
CN112311423A (zh) * 2019-07-30 2021-02-02 英飞凌科技股份有限公司 增补电源电路、电路装置和用于提供增补电源电压的方法
CN114205966A (zh) * 2020-09-18 2022-03-18 安徽展晖电子科技有限公司 驱动电路、照明电路以及照明装置
WO2023155044A1 (fr) * 2022-02-15 2023-08-24 华为技术有限公司 Système de communication en champ proche et son procédé de commande, ainsi que dispositif électronique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110875759A (zh) * 2018-08-31 2020-03-10 意法半导体(鲁塞)公司 Nfc设备的频率调整
CN112311423A (zh) * 2019-07-30 2021-02-02 英飞凌科技股份有限公司 增补电源电路、电路装置和用于提供增补电源电压的方法
CN114205966A (zh) * 2020-09-18 2022-03-18 安徽展晖电子科技有限公司 驱动电路、照明电路以及照明装置
WO2023155044A1 (fr) * 2022-02-15 2023-08-24 华为技术有限公司 Système de communication en champ proche et son procédé de commande, ainsi que dispositif électronique

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