CN204597904U - A kind of low-voltage discharge circuit worked under high voltage environment - Google Patents
A kind of low-voltage discharge circuit worked under high voltage environment Download PDFInfo
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- CN204597904U CN204597904U CN201520399705.5U CN201520399705U CN204597904U CN 204597904 U CN204597904 U CN 204597904U CN 201520399705 U CN201520399705 U CN 201520399705U CN 204597904 U CN204597904 U CN 204597904U
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- voltage
- operational amplifier
- stabilizing didoe
- voltage stabilizing
- bipolar operational
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Abstract
The utility model discloses a kind of low-voltage discharge circuit worked under high voltage environment, comprise bipolar operational amplifier U2, the first voltage stabilizing didoe D5, the second voltage stabilizing didoe D6, NPN transistor Q1 and PNP transistor Q2; The positive input of bipolar operational amplifier U2 connects input signal by the first resistance R1; The output of bipolar operational amplifier U2 is connected with the base stage of NPN transistor Q1 by the first voltage stabilizing didoe D5 just connect, and the emitter of NPN transistor Q1 is connected with bipolar operational amplifier U2 power end; The output of bipolar operational amplifier U2 is connected with the base stage of PNP transistor Q2 by the second voltage stabilizing didoe D6 of reversal connection, and the emitter of PNP transistor Q2 is connected with another power end of bipolar operational amplifier U2.The utility model circuit structure is simple, can realize no matter output voltage is high pressure or low pressure, can guarantee that the supply power voltage of operational amplifier is in its operating voltage range.
Description
Technical field
The utility model relates to a kind of low-voltage discharge circuit, particularly relates to a kind of low-voltage discharge circuit worked under high voltage environment.
Background technology
Nowadays, along with the progress of electronics technology, in life, there is increasing electronic equipment, and in the electronic device, amplifying circuit is an indispensable circuit often, and amplifier application is very extensive, and it has, and high-gain, input impedance are large, good linearity and the advantage such as can to use flexibly.The voltage power supply environment of general amplifier within ± 15V, when needs operational amplifier output valve reach ± 60V or higher time, the restriction that existing discharge circuit designs due to itself, very difficult realization completes this task.Therefore can realize this function, amplifier can be made undistorted and have the computing circuit of good precision, what just seem very is urgent.
Summary of the invention
In order to solve the above problems, the purpose of this utility model is to provide a kind of low-voltage discharge circuit worked under high voltage environment, and its structure is simple, ensures the linear of amplifier simultaneously.
The utility model adopts following technical scheme:
The low-voltage discharge circuit worked under high voltage environment, comprises bipolar operational amplifier U2, the first voltage stabilizing didoe D5, the second voltage stabilizing didoe D6, NPN transistor Q1 and PNP transistor Q2; The input first diode D1 of anti-phase connection in parallel of described bipolar operational amplifier U2 and the positive input of the second diode D2, bipolar operational amplifier U2 connect input signal by the first resistance R1; The output of described bipolar operational amplifier U2 is connected with the positive pole of the first voltage stabilizing didoe D5, and the negative pole of voltage stabilizing didoe D5 is connected with the base stage of NPN transistor Q1 by the 3rd resistance R3, and the negative pole of voltage stabilizing didoe D5 is also by the 4th resistance R4 and positive supply V
bconnect; The collector electrode of NPN transistor Q1 and DC power supply V
bconnect, the emitter of NPN transistor Q1 is connected with bipolar operational amplifier U2 power end; The output of described bipolar operational amplifier U2 is also connected with the negative pole of the second voltage stabilizing didoe D6, and the positive pole of voltage stabilizing didoe D6 is connected with the base stage of PNP transistor Q2 by the 5th resistance R5, and the positive pole of diode Q6 is also by the 7th resistance R7 and negative supply V
bconnect, the collector electrode of PNP transistor Q2 and DC negative supply V
bconnect, the emitter of PNP transistor Q2 is connected with another power end of bipolar operational amplifier U2.
Further, described low-voltage discharge circuit also comprises the 3rd diode D3 and the 4th diode D4, for realizing overvoltage protection; The positive pole of described 3rd diode D3 is connected with the inverting input of bipolar operational amplifier U2, and its negative pole is connected with the emitter of NPN transistor Q1; The positive pole of described 4th diode D4 is connected with the inverting input of bipolar operational amplifier U2, and its negative pole is connected with the emitter of PNP transistor Q2.
Further, the inverting input of described bipolar operational amplifier U2 forms feedback circuit by the output of the low-voltage discharge circuit worked under the second resistance R2 and high voltage environment.
Further, the first electric capacity C1 and the second electric capacity C2 is respectively equipped with between the base stage of described NPN transistor Q1 and PNP transistor Q2 and collector electrode, for eliminating the high-frequency signal in circuit.
Further, that described first voltage stabilizing didoe D5 and the second voltage stabilizing didoe D6 adopts is HZ9B3.
The beneficial effects of the utility model:
The utility model passes through reasonably in conjunction with bipolar operational amplifier U2, voltage stabilizing didoe and triode, achieve no matter output voltage is high pressure or low pressure, can guarantee that the supply power voltage of operational amplifier is in its operating voltage range, and ensure that the Linearity of operational amplifier.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is elaborated, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus more explicit defining is made to protection range of the present utility model.
In the utility model, that described first voltage stabilizing didoe D5 and the second voltage stabilizing didoe D6 adopts is HZ9B3, and the voltage stabilizing of voltage-stabiliser tube-HZ9B3 is at about 9V, and that described operational amplifier U2 adopts is amplifier IC-OPA627, and its operating voltage is ± 18V;
As shown in Figure 1, a kind of low-voltage discharge circuit worked under high voltage environment, comprises bipolar operational amplifier U2, the first voltage stabilizing didoe D5, the second voltage stabilizing didoe D6, NPN transistor Q1 and PNP transistor Q2; First diode D1 of the input anti-phase connection in parallel of described bipolar operational amplifier U2 and the second diode D2, diode D1 and diode D2 is for limiting input differential mode voltage, and the positive input of bipolar operational amplifier U2 connects input signal by the first resistance R1; The output of described bipolar operational amplifier U2 is connected with the positive pole of the first voltage stabilizing didoe D5, and the negative pole of voltage stabilizing didoe D5 is connected with the base stage of NPN transistor Q1 by the 3rd resistance R3, and the negative pole of voltage stabilizing didoe D5 is also by the 4th resistance R4 and positive supply V
bconnect; The collector electrode of NPN transistor Q1 and DC power supply V
bconnect, the emitter of NPN transistor Q1 is connected with bipolar operational amplifier U2 power end; The output of described bipolar operational amplifier U2 is also connected with the negative pole of the second voltage stabilizing didoe D6, and the positive pole of voltage stabilizing didoe D6 is connected with the base stage of PNP transistor Q2 by the 5th resistance R5, and the positive pole of diode Q6 is also by the 7th resistance R7 and negative supply V
bconnect, the collector electrode of PNP transistor Q2 and DC negative supply V
bconnect, the emitter of PNP transistor Q2 is connected with another power end of bipolar operational amplifier U2; The first electric capacity C1 and the second electric capacity C2 is respectively equipped with, for eliminating the high-frequency signal in circuit between the base stage of described NPN transistor Q1 and PNP transistor Q2 and collector electrode.
In the utility model, described low-voltage discharge circuit also comprises the 3rd diode D3 and the 4th diode D4, for realizing over-voltage protecting function; The positive pole of described 3rd diode D3 is connected with the inverting input of bipolar operational amplifier U2, and its negative pole is connected with the emitter of NPN transistor Q1; The positive pole of described 4th diode D4 is connected with the inverting input of bipolar operational amplifier U2, and its negative pole is connected with the emitter of PNP transistor Q2.
The inverting input of described bipolar operational amplifier U2 forms feedback circuit by the output of the low-voltage discharge circuit by working under the second resistance R2 and high voltage environment.
Below in conjunction with foregoing and Fig. 1 analysis when output HIGH voltage (positive and negative more than 60V), can operational amplifier normally work;
When exporting 0V: the first voltage stabilizing didoe D5 and the second voltage stabilizing didoe D6 conducting
1. the voltage put is+9V, and 2. point voltage is+9V-0.7V ≈+9V;
3. the voltage put is-9V, and the voltage 4. put is-9V+0.7V ≈-9V;
Above-mentioned 9V is the voltage stabilizing value of voltage stabilizing didoe, and described 0.7V is common triode V
bebetween pressure drop;
The absolute voltage working range Wei ∣ 2.-④ ∣=18V of operational amplifier U2, in its operating voltage range.
When exporting 60V:
1. the voltage 60V+9V=69V put, 2. point voltage is 69V-0.7V ≈ 69V;
3. the voltage put is 60V-9V=51V, and the voltage 4. put is 51V+0.7V ≈ 51V;
The absolute voltage working range Wei ∣ 2.-④ ∣=18V of operational amplifier U2, in its operating voltage range.
In like manner, when exporting as-60V:
The absolute voltage working range Wei ∣ 2.-④ ∣=18V of operational amplifier U2, in its operating voltage range.
As from the foregoing, low-voltage discharge circuit of the present utility model, the no matter height of output voltage, operational amplifier can normally work.
The above; be only one of embodiment of the present utility model; but protection range of the present utility model is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the utility model; the change can expected without creative work or replacement, all should be encompassed within protection range of the present utility model.Therefore, the protection range that protection range of the present utility model should limit with claims is as the criterion.
Claims (5)
1. the low-voltage discharge circuit worked under high voltage environment, is characterized in that: comprise bipolar operational amplifier U2, the first voltage stabilizing didoe D5, the second voltage stabilizing didoe D6, NPN transistor Q1 and PNP transistor Q2; The input first diode D1 of parallel connected in reverse phase in parallel of described bipolar operational amplifier U2 and the positive input of the second diode D2, bipolar operational amplifier U2 connect input signal by the first resistance R1; The output of described bipolar operational amplifier U2 is connected with the positive pole of the first voltage stabilizing didoe D5, and the negative pole of voltage stabilizing didoe D5 is connected with the base stage of NPN transistor Q1 by the 3rd resistance R3, and the negative pole of voltage stabilizing didoe D5 is also by the 4th resistance R4 and positive supply V
bconnect; The collector electrode of NPN transistor Q1 and DC power supply V
bconnect, the emitter of NPN transistor Q1 is connected with bipolar operational amplifier U2 power end; The output of described bipolar operational amplifier U2 is also connected with the negative pole of the second voltage stabilizing didoe D6, the positive pole of voltage stabilizing didoe D6 is connected with the base stage of PNP transistor Q2 by the 5th resistance R5, and the positive pole of voltage stabilizing didoe Q6 is also by the 7th resistance R7 and negative supply V
bconnect, the collector electrode of PNP transistor Q2 and DC negative supply V
bconnect, the emitter of PNP transistor Q2 is connected with another power end of bipolar operational amplifier U2.
2. a kind of low-voltage discharge circuit worked under high voltage environment according to claim 1, is characterized in that: described low-voltage discharge circuit also comprises the 3rd diode D3 and the 4th diode D4, for realizing overvoltage protection; The positive pole of described 3rd diode D3 is connected with the inverting input of bipolar operational amplifier U2, and its negative pole is connected with the emitter of NPN transistor Q1; The positive pole of described 4th diode D4 is connected with the inverting input of bipolar operational amplifier U2, and its negative pole is connected with the emitter of PNP transistor Q2.
3. a kind of low-voltage discharge circuit worked under high voltage environment according to claim 1, is characterized in that: the inverting input of described bipolar operational amplifier U2 forms feedback circuit by the output of the low-voltage discharge circuit worked under the second resistance R2 and high voltage environment.
4. a kind of low-voltage discharge circuit worked under high voltage environment according to claim 1, it is characterized in that: be respectively equipped with the first electric capacity C1 and the second electric capacity C2 between the base stage of described NPN transistor Q1 and PNP transistor Q2 and collector electrode, for eliminating the high-frequency signal in circuit.
5. a kind of low-voltage discharge circuit worked under high voltage environment according to claim 1, is characterized in that: that described first voltage stabilizing didoe D5 and the second voltage stabilizing didoe D6 adopts is HZ9B3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520399705.5U CN204597904U (en) | 2015-06-11 | 2015-06-11 | A kind of low-voltage discharge circuit worked under high voltage environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520399705.5U CN204597904U (en) | 2015-06-11 | 2015-06-11 | A kind of low-voltage discharge circuit worked under high voltage environment |
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| CN204597904U true CN204597904U (en) | 2015-08-26 |
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|---|---|---|---|
| CN201520399705.5U Expired - Fee Related CN204597904U (en) | 2015-06-11 | 2015-06-11 | A kind of low-voltage discharge circuit worked under high voltage environment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106603078A (en) * | 2016-12-21 | 2017-04-26 | 中国航空工业集团公司雷华电子技术研究所 | Circuit for improving ADC sampling accuracy |
| CN113056076A (en) * | 2021-03-12 | 2021-06-29 | 西安微电子技术研究所 | Phase inversion and electrostatic strengthening protection circuit |
| CN113395046A (en) * | 2021-06-18 | 2021-09-14 | 电子科技大学 | Integrated operation and discharge flat window expanding device based on variable asymmetric power supply mechanism |
-
2015
- 2015-06-11 CN CN201520399705.5U patent/CN204597904U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106603078A (en) * | 2016-12-21 | 2017-04-26 | 中国航空工业集团公司雷华电子技术研究所 | Circuit for improving ADC sampling accuracy |
| CN106603078B (en) * | 2016-12-21 | 2020-11-27 | 中国航空工业集团公司雷华电子技术研究所 | Circuit for improving ADC sampling precision |
| CN113056076A (en) * | 2021-03-12 | 2021-06-29 | 西安微电子技术研究所 | Phase inversion and electrostatic strengthening protection circuit |
| CN113056076B (en) * | 2021-03-12 | 2023-08-04 | 西安微电子技术研究所 | Phase inversion and static reinforcement protection circuit |
| CN113395046A (en) * | 2021-06-18 | 2021-09-14 | 电子科技大学 | Integrated operation and discharge flat window expanding device based on variable asymmetric power supply mechanism |
| CN113395046B (en) * | 2021-06-18 | 2022-06-03 | 电子科技大学 | Integrated operation and discharge flat window expanding device based on variable asymmetric power supply mechanism |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20190611 |
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| CF01 | Termination of patent right due to non-payment of annual fee |