CN204928754U - Supply circuit that floats is put to fortune - Google Patents
Supply circuit that floats is put to fortune Download PDFInfo
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- CN204928754U CN204928754U CN201520761037.6U CN201520761037U CN204928754U CN 204928754 U CN204928754 U CN 204928754U CN 201520761037 U CN201520761037 U CN 201520761037U CN 204928754 U CN204928754 U CN 204928754U
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- resistance
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Abstract
The utility model provides a supply circuit that floats is put to fortune, put including fortune, it is first, two transistors, six resistance, first electric capacity, power V+ and power V -, the positive supply end that the projecting pole and the fortune of the first transistor were put is connected, the collecting electrode and the first resistance other end, power V+ connects, base and first resistance one end, second resistance one end is connected, the negative supply end that the projecting pole and the fortune of second transistor were put is connected, the collecting electrode and the fourth resistance other end, power V - connects, base and fourth resistance one end, third resistance one end is connected, the output and the second resistance other end that fortune was put, the third resistance other end, first stabilivolt is anodal, first electric capacity one end is connected, first stabilivolt negative pole is connected with second stabilivolt negative pole, the first electric capacity other end is put the reverse input end with fortune and is connected, the utility model discloses a standing separately components and parts and buildding, the power supply that fortune was put changes along with transporting the output voltage of putting, reduces the power supply voltage that fortune was put, has reduced the consumption that fortune was put, has reduced the dc shift.
Description
Technical field
The utility model relates to a kind of amplifier floating power circuit, is that a kind of amplifier supply power voltage is lower but the amplifier power-supplying circuit that amplifier output amplitude is larger.
Background technology
In high-accuracy capacitor memory circuit, the DC shift of amplifier itself can not be ignored, amplifier supply power voltage size is one of factor affecting amplifier DC shift amount, in order to improve DC shift amount, the supply power voltage of amplifier can be reduced, but be reduction of the amplitude that supply power voltage can reduce again amplifier output signal, when adopt floating power mode be amplifier power time, this contradiction just can be resolved.
Summary of the invention
In order to solve the problem, the utility model provides a kind of amplifier floating power circuit, for solving the high DC shift problem caused of amplifier power supply.
The technology that the utility model adopts is as follows: a kind of amplifier floating power circuit, comprises the positive supply floating power circuit for providing positive supply for amplifier vdd terminal, for amplifier VSS end provides the negative supply floating power circuit of negative supply, and amplifier output violent change circuit; It is characterized in that:
Positive supply floating power circuit comprises the first transistor, first resistance, second resistance and power supply V+, the emitter of the first transistor is connected with the positive power source terminal of amplifier, the collector electrode of the first transistor is connected with the first resistance other end, power supply V+, the base stage of the first transistor is connected with first resistance one end, second resistance one end, and the second resistance other end is connected with the output of amplifier;
Negative supply floating power circuit comprises transistor seconds, 3rd resistance, 4th resistance and power supply V-, the emitter of transistor seconds is connected with the negative power end of amplifier, the collector electrode of transistor seconds is connected with the 4th resistance other end, power supply V-, the base stage of transistor seconds is connected with the 4th resistance one end, the 3rd resistance one end, and the 3rd resistance other end is connected with the output of amplifier;
Amplifier output violent change circuit comprises amplifier, first voltage-stabiliser tube, second voltage-stabiliser tube, first electric capacity, 5th resistance and the 6th resistance, the output of amplifier and the second resistance other end, the 3rd resistance other end, first voltage-stabiliser tube positive pole, first electric capacity one end connects, first voltage-stabiliser tube negative pole is connected with the second voltage-stabiliser tube negative pole, second voltage-stabiliser tube plus earth, the reverse input end of the first electric capacity other end and amplifier, 5th resistance one end connects, the 5th resistance other end is connected with input voltage VIN, the input in the same way of amplifier is connected with the 6th resistance one end, 6th resistance other end ground connection,
Amplifier floating power circuit of the present utility model, discrete electronic devices and components are adopted to build, the transistor of floating power circuit adopts emitter follower connected mode to be that amplifier is powered, follower emitter voltage is servo-actuated with amplifier output voltage, when meeting amplifier output voltage amplitude, amplifier supply power voltage is about the half of fixing supply power voltage, after amplifier supply power voltage reduces, the lower power consumption of amplifier, heating reduces, DC shift reduces, and meets the requirement of accurate measurement circuit to DC shift amount.
Accompanying drawing explanation
Fig. 1 is the electric theory diagram of embodiment 1 of the utility model amplifier floating power circuit.
Fig. 2 is embodiment 1 electrical schematic diagram of the utility model amplifier floating power circuit.
Embodiment
Illustrate with reference to the accompanying drawings below and the utility model be further described:
embodiment 1
A kind of amplifier floating power circuit, comprises the positive supply floating power circuit for providing positive supply for amplifier vdd terminal, for amplifier VSS end provides the negative supply floating power circuit of negative supply, and amplifier output violent change circuit; It is characterized in that:
Positive supply floating power circuit comprises the first transistor Q1, first resistance R1, second resistance R2 and power supply V+, the emitter of the first transistor Q1 and the 7th pin of amplifier A1, namely VDD pin connects, and the collector electrode of the first transistor Q1 is connected with the first resistance R1 other end, power supply V+, and the base stage of the first transistor Q1 is connected with first resistance R1 one end, second resistance R2 one end, 6th pin of the second resistance R2 other end and amplifier A1, namely output connects;
Negative supply floating power circuit comprises transistor seconds Q2,3rd resistance R3,4th resistance R4 and power supply V-, the emitter of transistor seconds Q2 and the 4th pin of amplifier A1, namely VSS pin connects, and the collector electrode of transistor seconds Q2 is connected with the 4th resistance R4 other end, power supply V-, and the base stage of transistor seconds Q2 is connected with the 4th resistance R4 one end, the 3rd resistance R3 one end, the 3rd resistance R3 other end and amplifier A1 the 6th pin, namely output connects;
Amplifier output violent change circuit comprises amplifier A1, first voltage-stabiliser tube D1, second voltage-stabiliser tube D2, first electric capacity C1, 5th resistance R5 and the 6th resistance R6, amplifier A1 the 6th pin, i.e. output and the second resistance R2 other end, the 3rd resistance R3 other end, first voltage-stabiliser tube D1 positive pole, first electric capacity C1 one end connects, first voltage-stabiliser tube D1 negative pole is connected with the second voltage-stabiliser tube D2 negative pole, second voltage-stabiliser tube D2 plus earth, the first electric capacity C1 other end and amplifier A1 crus secunda, 5th resistance R5 one end connects, the 5th resistance R5 other end is connected with input voltage VIN, amplifier A1 tripod is connected with the 6th resistance R6 one end, 6th resistance R6 other end ground connection,
The resistance size of the first resistance R1 is 10 kilo-ohms, the resistance size of the second resistance R2 is 15 kilo-ohms, the resistance size of the 3rd resistance R3 is 15 kilo-ohms, the resistance size of the 4th resistance R4 is 10 kilo-ohms, and the first voltage-stabiliser tube is D18.2V/0.5W voltage-stabiliser tube, and the second voltage-stabiliser tube D2 is D18.2V/0.5W voltage-stabiliser tube, the first transistor Q1 is S9013NPN type silicon transistor, transistor seconds is S9012PNP type silicon transistor, and amplifier A1 is OPA111, and power supply V-is-12V;
First resistance R1 and the second resistance R2 is the inclined value resistance of the first transistor Q1, 3rd resistance R3 and the 4th resistance R4 is the inclined value resistance of transistor seconds Q2, when amplifier A1 output voltage positive change, the first transistor Q1 emitter voltage positive change, transistor seconds Q2 emitter voltage positive change, during the change of amplifier A1 output voltage negative sense, the first transistor Q1 emitter voltage negative sense changes, transistor seconds Q2 emitter voltage negative sense changes, amplifier A1 powers along with the change of amplifier output voltage, achieve floating power, amplifier is in lower supply power voltage situation, still can keep enough output voltage amplitudes.
Claims (1)
1. an amplifier floating power circuit, comprises for providing the positive supply floating power circuit of positive supply for amplifier vdd terminal, providing the negative supply floating power circuit of negative supply, amplifier output violent change circuit for amplifier VSS end; It is characterized in that:
Described positive supply floating power circuit comprises the first transistor (Q1), the first resistance (R1), the second resistance (R2) and power supply V+, the emitter of the first transistor (Q1) is connected with the positive power source terminal of amplifier (A1), the collector electrode of the first transistor (Q1) is connected with the first resistance (R1) other end, power supply V+, the base stage of the first transistor (Q1) is connected with the first resistance (R1) one end, the second resistance (R2) one end, and the second resistance (R2) other end is connected with the output of amplifier (A1);
Described negative supply floating power circuit comprises transistor seconds (Q2), the 3rd resistance (R3), the 4th resistance (R4) and power supply V-, the emitter of transistor seconds (Q2) is connected with the negative power end of amplifier (A1), the collector electrode of transistor seconds (Q2) is connected with the 4th resistance (R4) other end, power supply V-, the base stage of transistor seconds (Q2) is connected with the 4th resistance (R4) one end, the 3rd resistance (R3) one end, and the 3rd resistance (R3) other end is connected with the output of amplifier (A1);
Described amplifier output violent change circuit comprises amplifier (A1), first voltage-stabiliser tube (D1), second voltage-stabiliser tube (D2), first electric capacity (C1), 5th resistance (R5) and the 6th resistance (R6), the output of amplifier (A1) and the second resistance (R2) other end, 3rd resistance (R3) other end, first voltage-stabiliser tube (D1) positive pole, first electric capacity (C1) one end connects, first voltage-stabiliser tube (D1) negative pole is connected with the second voltage-stabiliser tube (D2) negative pole, second voltage-stabiliser tube (D2) plus earth, the reverse input end of the first electric capacity (C1) other end and amplifier (A1), 5th resistance (R5) one end connects, 5th resistance (R5) other end is connected with input voltage VIN, the input in the same way of amplifier (A1) is connected with the 6th resistance (R6) one end, 6th resistance (R6) other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520761037.6U CN204928754U (en) | 2015-09-29 | 2015-09-29 | Supply circuit that floats is put to fortune |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520761037.6U CN204928754U (en) | 2015-09-29 | 2015-09-29 | Supply circuit that floats is put to fortune |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204928754U true CN204928754U (en) | 2015-12-30 |
Family
ID=54977849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520761037.6U Expired - Fee Related CN204928754U (en) | 2015-09-29 | 2015-09-29 | Supply circuit that floats is put to fortune |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204928754U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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
- 2015-09-29 CN CN201520761037.6U patent/CN204928754U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20151230 Termination date: 20180929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |