WO2007138791A1 - アナログ絶縁マルチプレクサ - Google Patents
アナログ絶縁マルチプレクサ Download PDFInfo
- Publication number
- WO2007138791A1 WO2007138791A1 PCT/JP2007/057876 JP2007057876W WO2007138791A1 WO 2007138791 A1 WO2007138791 A1 WO 2007138791A1 JP 2007057876 W JP2007057876 W JP 2007057876W WO 2007138791 A1 WO2007138791 A1 WO 2007138791A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- analog
- resistor
- switching element
- signal
- drive
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/693—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/689—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors with galvanic isolation between the control circuit and the output circuit
- H03K17/691—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors with galvanic isolation between the control circuit and the output circuit using transformer coupling
Definitions
- the present invention relates to an analog isolation multiplexer used for collecting analog signals by removing the influence of a signal source ground.
- analog signal collectors In order to eliminate the influence of the signal source ground and collect analog signals at low cost, analog signal collectors using analog isolation multiplexers that isolate each point of the analog signal from the ground have been used. I'm being beaten.
- FIG. 6 is a configuration diagram of an analog signal acquisition device in which a conventional analog isolation multiplexer is mounted.
- FIG. 7 is a circuit configuration diagram of a conventional analog isolation multiplexer. In the analog isolation multiplexer shown in Fig. 7, analog signal is input with the FET switch FET2 (corresponding to the second switching element) in order to input the analog signal isolated from the ground. It is necessary to cover the next side.
- FET switch FET2 corresponding to the second switching element
- Patent Document 1 discloses various configurations of the FET switch FET2 on the primary side of the analog signal isolation transformer T2, and also shows that the drive isolation transformer T1 is pulse-driven.
- Patent Document 1 Japanese Patent Publication No. 60-10449
- Patent Document 2 JP-A 63-158911
- the conventional techniques have the following problems.
- Conventional analog isolation multiplexer In Lexa the drive isolation transformer is a method of driving a constant noise voltage. Therefore, when trying to reduce the size of the transformer, the sag becomes large, or the transformer may become magnetically saturated at high temperatures, and analog data may not be collected normally.
- FIG. 8 is a diagram showing a time waveform of the secondary side voltage V2 of the drive isolation transformer T1 in the conventional analog isolation multiplexer. Due to the miniaturization of the transformer, at the start of driving, the FET switch has enough voltage to exceed the threshold voltage Vth of FET2. However, in the second half of the drive, the voltage drops due to the sag and cannot exceed Vth, and the FET switch FET2 cannot be turned on.
- a method of shortening the drive time is difficult to apply in analog multiplexers because drive pulses are often performed at regular intervals. If the drive time is shortened, the pulse width of the analog signal output from the multiplexer is narrowed, so that the response time of the connected amplifier is insufficient and settling is not sufficient, or the sample hold in the subsequent stage cannot respond. This causes a problem.
- the present invention has been made to solve the above-described problems. It is an object of the present invention to obtain an analog insulation multiplexer having a wide operating temperature range without causing magnetic saturation even when a small or ultra-small transformer is used. Objective.
- the analog isolation multiplexer includes a first switching element that generates a drive control signal by switching according to an external signal, and the drive control signal is applied to the primary side via the first resistor.
- Isolated drive transformer that outputs the isolated drive control signal to the secondary side, and second switching that generates the chobbing analog signal by checking the analog signal input according to the isolated drive control signal
- the primary side of a drive isolation transformer in an analog isolation multiplexer comprising an element and an analog signal isolation transformer that outputs a choking analog signal to the secondary side and outputs an isolated choving analog signal to the secondary side.
- a second resistor with one end connected between the first resistor and the first resistor, and one end grounded and the other end in series with the second resistor
- a secondary side output adjusting circuit having a connection to a capacitor.
- a secondary-side output adjustment circuit including a series circuit of a resistor and a capacitor is provided, and the element value of the secondary-side output adjustment circuit is designed to a desired value, so that the drive isolation transformer The voltage waveform on the secondary side can be made closer to the desired shape, and even when a small or ultra-small transformer is used, magnetic saturation does not occur and an analog isolation multiplexer with a wide operating temperature range can be obtained.
- FIG. 1 is a configuration diagram of an analog isolation multiplexer according to a first embodiment of the present invention.
- FIG. 2 is a diagram showing a time waveform of a secondary side voltage of the drive insulating transformer according to the first exemplary embodiment of the present invention.
- FIG. 3 is a configuration diagram of an analog isolation multiplexer according to a second embodiment of the present invention.
- FIG. 4 is a configuration diagram of an analog isolation multiplexer according to a third embodiment of the present invention.
- FIG. 5 is a configuration diagram of an analog isolation multiplexer according to a fourth embodiment of the present invention.
- FIG. 6 is a configuration diagram of an analog signal acquisition device equipped with a conventional analog isolation multiplexer.
- FIG. 7 is a circuit configuration diagram of a conventional analog isolation multiplexer.
- FIG. 8 is a diagram showing a time waveform of a secondary side voltage of a drive isolation transformer in a conventional analog isolation multiplexer.
- the analog isolation multiplexer of the present invention includes a secondary side output adjustment circuit, so that the secondary side voltage of the drive isolation transformer for choking the analog signal input is thresholded according to the ONZOFF period of the control signal from the outside. This ensures a sufficient period of time exceeding the voltage and allows the backswing to converge faster.
- FIG. 1 is a configuration diagram of an analog isolation multiplexer according to Embodiment 1 of the present invention.
- the analog isolation multiplexer in Fig. 1 is composed of drive isolation transformer Tl, analog signal isolation transformer ⁇ 2, field effect transistors FET1, FET2, resistors R1 to R3, diode Dl, and capacitor C1.
- the field effect transistor FET1 corresponds to a first switching element
- the field effect transistor FET2 corresponds to a second switching element
- the resistors R1 to R3 correspond to the first resistor to the third resistor, respectively.
- An external force control signal output from the digital element is applied from the signal line L1 to the gate of FET1.
- the FET 1 performs a switching operation according to the ONZOFF period of the external control signal, and as a result, a drive control signal is obtained on the signal line L2.
- the power supply voltage Vc is charged in the capacitor C1, and the capacitor C1 is considered to be a battery having a voltage Vc within a sufficiently short time immediately after the FET1 is turned ON.
- the primary winding of the drive isolation transformer T1 has almost no large current in a transient state immediately after FET1 is turned on. Therefore, the voltage V of the signal line L2 connected to the drive isolation transformer T1 is immediately after turning on FET1.
- a voltage force substantially the same as the voltage of the signal line L2 appears as the voltage on the secondary side of the drive isolation transformer T1, and has the waveform shown in FIG.
- an external force that reduces the influence of sag which is a problem in the prior art, is reduced. It is possible to keep V2 above Vth for a sufficient time Tdrv according to the ON period of the control signal.
- the voltage waveform on the secondary side of the drive isolation transformer is externally applied. It can be brought close to a desired shape according to the control signal. As a result, even when a small or ultra-small transformer is used as the drive insulation transformer, an analog insulation multiplexer with a wide operating temperature range can be obtained without causing magnetic saturation.
- FIG. 3 is a configuration diagram of the analog isolation multiplexer according to the second embodiment of the present invention.
- the configuration of FIG. 3 in the second embodiment is different from the configuration of FIG. 1 in the first embodiment in the internal configuration of the secondary side output adjustment circuit 10.
- the number of diodes is only one of D1 in FIG. 1, but is composed of two of Dl and D2 in FIG.
- the basic operation is the same as in the first embodiment. That is, at the moment FET1 is turned on, the power supply voltage Vc is charged to the capacitor C1, and within a sufficiently short time immediately after the FET1 is turned on, the capacitor C1 is considered to be a battery with the voltage Vc. This is the same as Form 1.
- the value of Vs can be set to a voltage exceeding the threshold voltage Vth of FET2 by adjusting the values of R1 and R2.
- the V voltage at the time of transition is lowered by V compared to the first embodiment, so the value of R2
- the same effect as in the first embodiment can be obtained also by connecting two or more diodes of the secondary side output adjustment circuit in series. be able to. Furthermore, the design freedom of the resistance value can be increased by increasing the number of diodes.
- FIG. 4 is a configuration diagram of the analog isolation multiplexer according to the third embodiment of the present invention.
- the configuration of FIG. 4 in the third embodiment is the same as the configuration of FIG. 1 in the first embodiment.
- the internal configuration of the secondary output adjustment circuit 10 is different. Specifically, instead of the diode D1 in FIG. 1, a FET3 corresponding to a third switching element, a resistor R6, and a capacitor C2 are provided.
- the basic configuration other than the secondary output adjustment circuit 10 is the same as in FIG.
- the external force control signal output from the digital element is applied to the gates of the signal line L 1 force FET1 and FET3.
- this control signal is “H”
- both FET1 and FET3 Is turned on.
- FET3 is turned on, capacitor C1 is connected, and a time constant circuit of C1 and (R1 + R2) is the same as in the first embodiment.
- the power supply voltage Vc is charged in the capacitor C1, and the capacitor C1 is considered to be a battery of voltage Vc within a sufficiently short time immediately after the FET1 is turned on. .
- the primary winding of the drive isolation transformer T1 has a large impedance and almost no current flows in a transient state immediately after the FET1 is turned on. Therefore, the voltage V of the signal line L2 connected to the drive isolation transformer T1 is actually 2 immediately after turning on FET1.
- the same effect as that of the first embodiment can be obtained by using the third switching element instead of the diode in the secondary output adjustment circuit.
- An effect can be obtained.
- the element value in the secondary output adjustment circuit can be designed without considering the forward voltage drop due to the diode.
- FIG. 5 is a configuration diagram of an analog isolation multiplexer according to the fourth embodiment of the present invention.
- the configuration of FIG. 5 in the fourth embodiment is different from the configuration of FIG. 1 in the first embodiment in the internal configuration of the secondary side output adjustment circuit 10.
- Figure 1 A resistor R4 corresponding to the fourth resistor is provided instead of eliminating the diode Dl and the resistor R3 in FIG.
- the basic configuration other than the secondary output adjustment circuit 10 is the same as in FIG.
- the external force control signal output from the digital element is applied to the gate of the signal line L 1 force FET 1.
- this control signal is “H”
- FET 1 is turned ON.
- capacitor C1 is connected, and a time constant circuit of C1 and (R1 + R2) is the same as in the first embodiment.
- a resistor R4 corresponding to the fourth resistor is further inserted on the primary side of the drive isolation transformer T1.
- the configuration is as follows. In other words, the resistor R2 as the fourth resistor is added between the transformer primary winding and C1, and the backswing when the digital element is turned off is suppressed.
- the fourth resistor is used for the ON period of the control signal from the outside.
- the same effect as in the first embodiment can be obtained.
- the convergence of the backswing is inferior to that when a diode or a third switching element is used, but the circuit configuration is simplified and Swing can be suppressed.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/298,673 US7973588B2 (en) | 2006-05-26 | 2007-04-10 | Analog insulation/multiplexer |
| CN200780019264XA CN101454980B (zh) | 2006-05-26 | 2007-04-10 | 模拟绝缘多路复用器 |
| EP07741312A EP2023488B1 (en) | 2006-05-26 | 2007-04-10 | Analog insulation/multiplexer |
| JP2008517801A JP4651711B2 (ja) | 2006-05-26 | 2007-04-10 | アナログ絶縁マルチプレクサ |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006146599 | 2006-05-26 | ||
| JP2006-146599 | 2006-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007138791A1 true WO2007138791A1 (ja) | 2007-12-06 |
Family
ID=38778314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/057876 Ceased WO2007138791A1 (ja) | 2006-05-26 | 2007-04-10 | アナログ絶縁マルチプレクサ |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7973588B2 (ja) |
| EP (1) | EP2023488B1 (ja) |
| JP (1) | JP4651711B2 (ja) |
| KR (1) | KR101027835B1 (ja) |
| CN (1) | CN101454980B (ja) |
| WO (1) | WO2007138791A1 (ja) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101149308B1 (ko) | 2009-04-02 | 2012-05-24 | 삼성코닝정밀소재 주식회사 | 태양전지용 다층박막 구조 |
| CN102274857B (zh) * | 2011-07-12 | 2013-04-24 | 北京京诚瑞信长材工程技术有限公司 | 高速线材吐丝机动平衡调整工艺方法 |
| US20230006559A1 (en) * | 2021-06-30 | 2023-01-05 | Texas Instruments Incorporated | Data transfer through an isolated power converter |
| KR102700289B1 (ko) * | 2021-11-09 | 2024-08-28 | 미쓰비시덴키 가부시키가이샤 | 아날로그 신호 입력 장치 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232350A (en) * | 1975-09-05 | 1977-03-11 | Mitsubishi Electric Corp | Analog digital converter |
| JPS5352347A (en) * | 1976-10-23 | 1978-05-12 | Denki Onkyo Co Ltd | System for driving large power switching transistor |
| JPS6010449B2 (ja) | 1982-07-08 | 1985-03-18 | 三菱電機株式会社 | アナログ−デイジタル変換装置 |
| JPS6262619A (ja) * | 1985-09-13 | 1987-03-19 | Fuji Elelctrochem Co Ltd | トランジスタのスピ−ドアツプ回路 |
| JPS63158911A (ja) | 1986-12-23 | 1988-07-01 | Mitsubishi Electric Corp | トランス駆動装置 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT946985B (it) * | 1972-01-28 | 1973-05-21 | Honeywell Inf Systems | Circuito di pilotaggio a trasforma tore per transistore interruttore |
| JPS50111978A (ja) * | 1974-02-12 | 1975-09-03 | ||
| JPS50143454A (ja) | 1974-04-17 | 1975-11-18 | ||
| JPS50143454U (ja) * | 1974-05-11 | 1975-11-27 | ||
| US4158810A (en) * | 1974-10-21 | 1979-06-19 | Leskovar Silvin M | Telemetering post for measuring variables in a high-voltage overhead line |
| JPS5679018U (ja) * | 1979-11-24 | 1981-06-26 | ||
| US4629971A (en) * | 1985-04-11 | 1986-12-16 | Mai Basic Four, Inc. | Switch mode converter and improved primary switch drive therefor |
| JP3207229B2 (ja) | 1991-12-20 | 2001-09-10 | 富士写真光機株式会社 | 電子内視鏡装置の信号伝送処理回路 |
| JPH09261951A (ja) | 1996-03-22 | 1997-10-03 | Yokogawa Electric Corp | パルストランス |
| JP3761795B2 (ja) * | 2000-04-10 | 2006-03-29 | 三菱電機株式会社 | ディジタル回線多重化装置 |
-
2007
- 2007-04-10 CN CN200780019264XA patent/CN101454980B/zh active Active
- 2007-04-10 JP JP2008517801A patent/JP4651711B2/ja active Active
- 2007-04-10 WO PCT/JP2007/057876 patent/WO2007138791A1/ja not_active Ceased
- 2007-04-10 US US12/298,673 patent/US7973588B2/en active Active
- 2007-04-10 KR KR1020087031602A patent/KR101027835B1/ko not_active Expired - Fee Related
- 2007-04-10 EP EP07741312A patent/EP2023488B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232350A (en) * | 1975-09-05 | 1977-03-11 | Mitsubishi Electric Corp | Analog digital converter |
| JPS5352347A (en) * | 1976-10-23 | 1978-05-12 | Denki Onkyo Co Ltd | System for driving large power switching transistor |
| JPS6010449B2 (ja) | 1982-07-08 | 1985-03-18 | 三菱電機株式会社 | アナログ−デイジタル変換装置 |
| JPS6262619A (ja) * | 1985-09-13 | 1987-03-19 | Fuji Elelctrochem Co Ltd | トランジスタのスピ−ドアツプ回路 |
| JPS63158911A (ja) | 1986-12-23 | 1988-07-01 | Mitsubishi Electric Corp | トランス駆動装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2023488A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101454980A (zh) | 2009-06-10 |
| JPWO2007138791A1 (ja) | 2009-10-01 |
| KR20090028562A (ko) | 2009-03-18 |
| EP2023488A1 (en) | 2009-02-11 |
| EP2023488A4 (en) | 2010-10-13 |
| JP4651711B2 (ja) | 2011-03-16 |
| US20090066401A1 (en) | 2009-03-12 |
| KR101027835B1 (ko) | 2011-04-07 |
| CN101454980B (zh) | 2011-09-07 |
| EP2023488B1 (en) | 2012-09-12 |
| US7973588B2 (en) | 2011-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8149042B2 (en) | Analog switch for signal swinging between positive and negative voltages | |
| EP0808025B1 (en) | Load actuation circuit | |
| TWI442208B (zh) | 帶有動態生成追蹤參考電壓的限流負載開關及其方法 | |
| EP3360252B1 (en) | An optimized cmos analog switch | |
| US20100309710A1 (en) | Variable Impedance Circuit Controlled by a Ferroelectric Capacitor | |
| EP2800274A1 (en) | Gate driver circuit | |
| US8254073B1 (en) | High voltage transmit/receive switch and method therefor | |
| CN107835017A (zh) | 多路复用器失真取消 | |
| JP4651711B2 (ja) | アナログ絶縁マルチプレクサ | |
| EP2210340B1 (en) | A switching circuit | |
| CN1937378A (zh) | 接通半导体电路的电压源的方法和装置及相应半导体电路 | |
| EP0015554B1 (en) | Comparator circuit | |
| TW200838132A (en) | Buffer circuit and control method thereof | |
| US7183816B2 (en) | Circuit and method for switching an electrical load on after a delay | |
| JP3801112B2 (ja) | 画像読取信号処理装置 | |
| US7880462B2 (en) | Pulsed coil drive circuit for a sampled inductive transducer | |
| EP1351061A1 (en) | Fuel gauge power switch with current sense | |
| EP3224952B1 (en) | Solid state switch relay | |
| US6683487B2 (en) | Current driver circuit for supplying write current to a write head while changing a flow direction of the write current | |
| CN120165571A (zh) | 控制电路及开关电源 | |
| WO2020095561A1 (ja) | 負荷駆動装置及び変速機の駆動システム | |
| US9407250B2 (en) | Systems for accurate multiplexing | |
| US6798263B1 (en) | Reset feature for a low voltage differential latch | |
| JP7459131B2 (ja) | ゲート駆動回路および電力変換装置 | |
| US7659756B2 (en) | MOSFET transistor amplifier with controlled output current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 200780019264.X Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07741312 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2008517801 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2007741312 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 12298673 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1020087031602 Country of ref document: KR |
