CN201072859Y - Signal isolating and amplifying circuit module - Google Patents
Signal isolating and amplifying circuit module Download PDFInfo
- Publication number
- CN201072859Y CN201072859Y CNU2007200909109U CN200720090910U CN201072859Y CN 201072859 Y CN201072859 Y CN 201072859Y CN U2007200909109 U CNU2007200909109 U CN U2007200909109U CN 200720090910 U CN200720090910 U CN 200720090910U CN 201072859 Y CN201072859 Y CN 201072859Y
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- circuit
- input
- amplifier
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Abstract
The utility model discloses a signal isolating amplifier circuit module, which comprises a matrix, a reference voltage biasing circuit arranged on the matrix, an input interface circuit, an input amplifier, a signal isolating circuit, an output amplifier, a power supply modulation chip, an isolation transformer and a voltage regulation and rectification circuit; the input ends of the reference voltage biasing circuit and the input interface circuit are separately connected with the same phase end of the amplifier electrically; the output end of the input amplifier is electrically connected with the input end of the signal isolating circuit; a feedback circuit is arranged between the input end of the signal isolating circuit and the reserved-phase end of the input amplifier; the output end of the signal isolating circuit is electrically connected with the reserved-phase end of the output amplifier; the output end of the output amplifier is electrically connected with the signal output interface; the output end of the power supply modulation chip is electrically connected with the primary coil of the isolation transformer; the secondary coil of the isolation transformer is electrically connected with the input end of the voltage regulation and rectification circuit. The utility model has the advantages of strong universality and aims at various situations without changing printed boards.
Description
Technical field
The utility model relates to amplification buffer circuit module, especially relates to Signal Spacing amplifying circuit module.
Background technology
Signal Spacing amplifying circuit module is widely used in the measurement to interchange, direct current, pulse voltage/electric current.It is poor that the present existing deficiency of Signal Spacing amplifying circuit module mainly shows as versatility, make and need change printed board at different measurement parameters, and volume is not easy to greatly install, carry.
The utility model content
The utility model purpose is to provide that a kind of volume is little, the Signal Spacing amplifying circuit module of highly versatile.
For achieving the above object, the utility model can be taked following technical proposals:
Signal Spacing amplifying circuit module described in the utility model, it comprises matrix, is arranged on reference voltage biasing circuit, input interface circuit, input amplifier, signal isolation circuit, output amplifier, power supply modulation chip, isolating transformer and voltage stabilizing rectification circuit on the described matrix; The output of described reference voltage biasing circuit, input interface circuit is electrically connected with the in-phase end of described amplifier respectively; The input amplifier output is electrically connected with the signal isolation circuit input; Between signal isolation circuit input and input amplifier end of oppisite phase, be provided with feedback circuit; The signal isolation circuit output is electrically connected with the output amplifier end of oppisite phase; The output amplifier output is electrically connected with signal output interface; Described power supply modulation chip output is electrically connected with the isolating transformer primary coil, and the isolating transformer secondary coil is electrically connected with the voltage stabilizing rectification circuit input end.
The utility model advantage is highly versatile, at interchange, direct current, the pulse voltage/current measurement of various use occasions, need not to change printed board and only gets final product by suitably revising the related elements parameter configuration; The reference voltage biasing circuit provides the dead band bias voltage of linear optical coupling input light-emitting diode, makes to have favorable linearity in whole signal measurement scope.When being used for voltage measurement, the input impedance of this module can be to 10K Ω/V even higher, and the input impedance of accurate D.C mutual-inductor when measuring alternating voltage is generally 1K Ω/V; High input impedance makes circuit safety greatly strengthen.Because what Signal Spacing adopted is linear optical coupling, what isolated from power adopted is transformer (magnet ring), carries out the PCB layout, can make the circuit isolation to more than the 2500Vrms.Insulating power supply is owing to adopt modulation system, and amplifier adopts single supply, and low temperature floats operational amplifier, and entire circuit is a single power supply, so its volume can be done very for a short time, volume is 25 * 30 * 20mm only, and operating current is no more than 30mA.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the schematic block circuit diagram of Fig. 1.
Embodiment
As shown in the figure, Signal Spacing amplifying circuit module described in the utility model, it comprises matrix, is arranged on reference voltage biasing circuit, input interface circuit, input amplifier U1 (OPA237), signal isolation circuit U2 (HCNR200), output amplifier U3 (OPA237), power supply modulation chip U4 (MC34063), isolating transformer T1 and voltage stabilizing rectification circuit on the described matrix; The output of described reference voltage biasing circuit, input interface circuit is electrically connected with the in-phase end of described amplifier U1 (OPA237) respectively; Input amplifier U1 (OPA237) output is electrically connected with signal isolation circuit U2 (HCNR200) input; Between signal isolation circuit U2 (HCNR200) input and input amplifier U1 (OPA237) end of oppisite phase, be provided with feedback circuit; Signal isolation circuit U2 (HCNR200) output is electrically connected with output amplifier U3 (OPA237) end of oppisite phase; Output amplifier U3 (OPA237) output is electrically connected with signal output interface J2; Described power supply modulation chip U4 (MC34063) output is electrically connected with isolating transformer T1 primary coil, and isolating transformer T1 secondary coil is electrically connected with the voltage stabilizing rectification circuit input end.
Claims (1)
1. Signal Spacing amplifying circuit module, it is characterized in that: it comprises matrix, is arranged on reference voltage biasing circuit, input interface circuit, input amplifier (U1), signal isolation circuit (U2), output amplifier (U3), power supply modulation chip (U4), isolating transformer (T1) and voltage stabilizing rectification circuit on the described matrix; The output of described reference voltage biasing circuit, input interface circuit is electrically connected with the in-phase end of described amplifier (U1) respectively; Input amplifier (U1) output is electrically connected with signal isolation circuit (U2) input; Between signal isolation circuit (U2) input and input amplifier (U1) end of oppisite phase, be provided with feedback circuit; Signal isolation circuit (U2) output is electrically connected with output amplifier (U3) end of oppisite phase; Output amplifier (U3) output is electrically connected with signal output interface (J2); Described power supply modulation chip (U4) output is electrically connected with isolating transformer (T1) primary coil, and isolating transformer (T1) secondary coil is electrically connected with the voltage stabilizing rectification circuit input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909109U CN201072859Y (en) | 2007-07-03 | 2007-07-03 | Signal isolating and amplifying circuit module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909109U CN201072859Y (en) | 2007-07-03 | 2007-07-03 | Signal isolating and amplifying circuit module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072859Y true CN201072859Y (en) | 2008-06-11 |
Family
ID=39551412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200909109U Expired - Lifetime CN201072859Y (en) | 2007-07-03 | 2007-07-03 | Signal isolating and amplifying circuit module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201072859Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377395A (en) * | 2011-08-10 | 2012-03-14 | 苏州凌创电子科技有限公司 | Single-channel signal isolating and amplifying device |
| CN104660193A (en) * | 2015-01-21 | 2015-05-27 | 上海新研工业设备有限公司 | Linear optocoupler transmitting analog signal circuit |
| CN105141266A (en) * | 2015-07-31 | 2015-12-09 | 华中科技大学 | Photoelectric isolation amplifier of analogue signals |
| CN106656063A (en) * | 2017-01-12 | 2017-05-10 | 中国电子科技集团公司第四十四研究所 | Method for achieving linear isolated transmission of bipolar analog signals |
-
2007
- 2007-07-03 CN CNU2007200909109U patent/CN201072859Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377395A (en) * | 2011-08-10 | 2012-03-14 | 苏州凌创电子科技有限公司 | Single-channel signal isolating and amplifying device |
| CN104660193A (en) * | 2015-01-21 | 2015-05-27 | 上海新研工业设备有限公司 | Linear optocoupler transmitting analog signal circuit |
| CN105141266A (en) * | 2015-07-31 | 2015-12-09 | 华中科技大学 | Photoelectric isolation amplifier of analogue signals |
| CN106656063A (en) * | 2017-01-12 | 2017-05-10 | 中国电子科技集团公司第四十四研究所 | Method for achieving linear isolated transmission of bipolar analog signals |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080611 |
|
| CX01 | Expiry of patent term |