CN201828595U - DC voltage signal isolating amplifier circuit - Google Patents
DC voltage signal isolating amplifier circuit Download PDFInfo
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- CN201828595U CN201828595U CN 201020536696 CN201020536696U CN201828595U CN 201828595 U CN201828595 U CN 201828595U CN 201020536696 CN201020536696 CN 201020536696 CN 201020536696 U CN201020536696 U CN 201020536696U CN 201828595 U CN201828595 U CN 201828595U
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Abstract
The utility model provides a DC voltage signal isolating amplifier circuit comprising an input interface circuit, an input voltage follower circuit, a voltage signal isolating circuit, an output zero adjustment circuit and an output magnification coefficient adjusting circuit, wherein the output end of the input interface circuit is connected with the input end of the input voltage follower circuit, the output end of the input voltage follower circuit is connected with the input end of the voltage signal isolating circuit, and the output end of the voltage signal isolating circuit and the output end of the output zero adjustment circuit are respectively connected with the input end of the output magnification coefficient adjusting circuit. The output voltage zero potential and the output amplification coefficient of the circuit are respectively adjustable, and the isolating conversion of direct voltage and pulse voltage in different occasions can be carried out just by adjusting the zero point and the amplification coefficient, therefore the universality of the DC voltage signal isolating amplifier circuit is stronger; and various application requirements can be met just by adjusting the resistance value of adjustable resistors in the output zero adjustment circuit and the output magnification coefficient adjusting circuit, without changing printed boards.
Description
Technical field
The utility model relates to a kind of isolating amplifier circuit, especially relates to a kind of d. c. voltage signal isolating amplifier circuit that is used for microcomputer detecting system.
Background technology
The d. c. voltage signal Isolation Amplifier Module is widely used in the measurement to direct current, pulse voltage; At present, there is the deficiency of versatility difference in d. c. voltage signal isolating amplifier circuit module, at different measurement parameters, needs the change printed board, trouble, and it is time-consuming to require great effort.
Summary of the invention
The utility model is at the deficiencies in the prior art, and the d. c. voltage signal isolating amplifier circuit of a kind of stable performance, safe and reliable, highly versatile is provided.
The technical scheme that the utility model adopted is as follows: a kind of d. c. voltage signal isolating amplifier circuit, and it comprises input interface circuit, input voltage follow circuit, voltage signal buffer circuit, output zero adjustment circuit and output amplification coefficient adjustment circuit; Wherein, the output terminal of described input interface circuit connects the input end of described input voltage follow circuit, the output terminal of described input voltage follow circuit connects the input end of described voltage signal buffer circuit, and the output terminal of the output terminal of described voltage signal buffer circuit, described output zero adjustment circuit connects the input end that described output amplification coefficient is adjusted circuit respectively.
Described output zero adjustment circuit comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, stabilivolt Z1, stabilivolt Z2 and adjustable resistor W2, wherein, described resistance R 9 one ends connect the negative pole of described stabilivolt Z1, the negative pole of described stabilivolt Z1 connects described adjustable resistor W2 one end, described resistance R 10 1 ends connect the positive pole of described stabilivolt Z2, the positive pole of described stabilivolt Z2 connects the described adjustable resistor W2 other end, the minus earth of the positive pole of described stabilivolt Z1 and described stabilivolt Z2, the adjustment end of described adjustable resistor W2 connects described resistance R 7 one ends, described resistance R 8 one ends connect described resistance R 7 other ends, described resistance R 8 other end ground connection, described resistance R 7 other ends are as the output terminal of output zero adjustment circuit.
Described output amplification coefficient is adjusted circuit and is comprised resistance R 1, resistance R 2, resistance R 4, capacitor C 1, operational amplifier U3 and adjustable resistor W1, wherein, described resistance R 1, described resistance R 2, described adjustable resistor W1, described resistance R 4 is connected successively, the negative input end of described operational amplifier U3 is connected between resistance R 1 and the resistance R 2, the output terminal of described operational amplifier U3, the adjustment end of described adjustable resistor W1 is connected between adjustable resistor W1 and the resistance R 4, described capacitor C 1 one end ground connection, described capacitor C 1 other end connects described resistance R 4 one ends, and an end of described resistance R 4 is adjusted the output terminal of circuit as the output amplification coefficient.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, the output voltage zero potential of this d. c. voltage signal isolating amplifier circuit and output amplification coefficient all can be adjusted, for the direct current of different occasions, the isolation conversion of pulse voltage, as 5V～5V, 3.3V～3.3V, 5V～3.3V, 3.3V～5V isolates conversion, only zero point need be adjusted and amplification coefficient gets final product, versatility is stronger, need not change printed board at various user demands, the adjustable resistor resistance value of adjusting in output zero adjustment circuit, the output amplification coefficient adjustment circuit gets final product; This circuit is a high input impedance, makes circuit safety greatly strengthen, and isolates operational amplifier because Signal Spacing is just used, and the different electrical power module for power supply is adopted in input and output, can make the circuit isolation to more than the 2000Vrms, and working current is no more than 25mA.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of Fig. 1.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As depicted in figs. 1 and 2, a kind of d. c. voltage signal isolating amplifier circuit, it comprises input interface circuit, input voltage follow circuit, voltage signal buffer circuit, output zero adjustment circuit and output amplification coefficient adjustment circuit; Wherein, the output terminal of described input interface circuit connects the input end of described input voltage follow circuit, the output terminal of described input voltage follow circuit connects the input end of described voltage signal buffer circuit, and the output terminal of the output terminal of described voltage signal buffer circuit, described output zero adjustment circuit connects the input end that described output amplification coefficient is adjusted circuit respectively.
Described output zero adjustment circuit comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, stabilivolt Z1, stabilivolt Z2 and adjustable resistor W2, wherein, described resistance R 9 one ends connect the negative pole of described stabilivolt Z1, the negative pole of described stabilivolt Z1 connects described adjustable resistor W2 one end, described resistance R 10 1 ends connect the positive pole of described stabilivolt Z2, the positive pole of described stabilivolt Z2 connects the described adjustable resistor W2 other end, the minus earth of the positive pole of described stabilivolt Z1 and described stabilivolt Z2, the adjustment end of described adjustable resistor W2 connects described resistance R 7 one ends, described resistance R 8 one ends connect described resistance R 7 other ends, described resistance R 8 other end ground connection, described resistance R 7 other ends are as the positive input terminal of the output terminal of exporting zero adjustment circuit with concatenation operation amplifier U3.
Described output amplification coefficient is adjusted circuit and is comprised resistance R 1, resistance R 2, resistance R 4, capacitor C 1, operational amplifier U3 and adjustable resistor W1, wherein, described resistance R 1, described resistance R 2, described adjustable resistor W1, described resistance R 4 is connected successively, the negative input end of described operational amplifier U3 is connected between resistance R 1 and the resistance R 2, the output terminal of described operational amplifier U3, the adjustment end of described adjustable resistor W1 is connected between adjustable resistor W1 and the resistance R 4, described capacitor C 1 one end ground connection, described capacitor C 1 other end connects described resistance R 4 one ends, and an end of described resistance R 4 is adjusted the output terminal of circuit as the output amplification coefficient; The model of operational amplifier U3 is OP-07.
Described input voltage follow circuit is to follow operational amplifier U1, and its model is OP-07;
Described voltage signal buffer circuit is voltage signal isolating chip U2, and its model is ISO124P, and the output terminal of voltage signal isolating chip U2 is by the positive input terminal of resistance R 5 concatenation operation amplifier U3;
Described input interface circuit comprises resistance R 3, resistance R 6, capacitor C 2, diode D1 and diode D2.
Claims (3)
1. d. c. voltage signal isolating amplifier circuit is characterized in that: this circuit comprises that input interface circuit, input voltage follow circuit, voltage signal buffer circuit, output zero adjustment circuit and output amplification coefficient adjust circuit; Wherein, the output terminal of described input interface circuit connects the input end of described input voltage follow circuit, the output terminal of described input voltage follow circuit connects the input end of described voltage signal buffer circuit, and the output terminal of the output terminal of described voltage signal buffer circuit, described output zero adjustment circuit connects the input end that described output amplification coefficient is adjusted circuit respectively.
2. d. c. voltage signal isolating amplifier circuit according to claim 1, it is characterized in that: described output zero adjustment circuit comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, stabilivolt Z1, stabilivolt Z2 and adjustable resistor W2, wherein, described resistance R 9 one ends connect the negative pole of described stabilivolt Z1, the negative pole of described stabilivolt Z1 connects described adjustable resistor W2 one end, described resistance R 10 1 ends connect the positive pole of described stabilivolt Z2, the positive pole of described stabilivolt Z2 connects the described adjustable resistor W2 other end, the minus earth of the positive pole of described stabilivolt Z1 and described stabilivolt Z2, the adjustment end of described adjustable resistor W2 connects described resistance R 7 one ends, described resistance R 8 one ends connect described resistance R 7 other ends, described resistance R 8 other end ground connection, described resistance R 7 other ends are as the output terminal of output zero adjustment circuit.
3. d. c. voltage signal isolating amplifier circuit according to claim 1, it is characterized in that: described output amplification coefficient is adjusted circuit and is comprised resistance R 1, resistance R 2, resistance R 4, capacitor C 1, operational amplifier U3 and adjustable resistor W1, wherein, described resistance R 1, described resistance R 2, described adjustable resistor W1, described resistance R 4 is connected successively, the negative input end of described operational amplifier U3 is connected between resistance R 1 and the resistance R 2, the output terminal of described operational amplifier U3, the adjustment end of described adjustable resistor W1 is connected between adjustable resistor W1 and the resistance R 4, described capacitor C 1 one end ground connection, described capacitor C 1 other end connects described resistance R 4 one ends, and an end of described resistance R 4 is adjusted the output terminal of circuit as the output amplification coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020536696 CN201828595U (en) | 2010-09-20 | 2010-09-20 | DC voltage signal isolating amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020536696 CN201828595U (en) | 2010-09-20 | 2010-09-20 | DC voltage signal isolating amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828595U true CN201828595U (en) | 2011-05-11 |
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ID=43967121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020536696 Expired - Lifetime CN201828595U (en) | 2010-09-20 | 2010-09-20 | DC voltage signal isolating amplifier circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201828595U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735917A (en) * | 2012-07-10 | 2012-10-17 | 上海市电力公司 | Voltage acquisition circuit for digital signal processor (DSP) |
| CN103884892A (en) * | 2012-12-20 | 2014-06-25 | 苏州工业园区新宏博通讯科技有限公司 | Direct current voltage isolation sampling circuit |
| CN106817095A (en) * | 2017-02-23 | 2017-06-09 | 南京海兴电网技术有限公司 | A kind of small-signal isolated amplifier with self-calibration function |
| CN111030653A (en) * | 2019-12-24 | 2020-04-17 | 珠海凯邦电机制造有限公司 | PWM signal generating circuit and sawtooth wave signal generating circuit |
-
2010
- 2010-09-20 CN CN 201020536696 patent/CN201828595U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735917A (en) * | 2012-07-10 | 2012-10-17 | 上海市电力公司 | Voltage acquisition circuit for digital signal processor (DSP) |
| CN103884892A (en) * | 2012-12-20 | 2014-06-25 | 苏州工业园区新宏博通讯科技有限公司 | Direct current voltage isolation sampling circuit |
| CN106817095A (en) * | 2017-02-23 | 2017-06-09 | 南京海兴电网技术有限公司 | A kind of small-signal isolated amplifier with self-calibration function |
| CN111030653A (en) * | 2019-12-24 | 2020-04-17 | 珠海凯邦电机制造有限公司 | PWM signal generating circuit and sawtooth wave signal generating circuit |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |