CN204515577U - A kind of voltage supply circuit based on potentiometer regulation output voltage - Google Patents
A kind of voltage supply circuit based on potentiometer regulation output voltage Download PDFInfo
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- CN204515577U CN204515577U CN201520172759.8U CN201520172759U CN204515577U CN 204515577 U CN204515577 U CN 204515577U CN 201520172759 U CN201520172759 U CN 201520172759U CN 204515577 U CN204515577 U CN 204515577U
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- operational amplifier
- resistance
- output terminal
- voltage
- amplifying circuit
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Abstract
The utility model discloses a kind of voltage supply circuit based on potentiometer regulation output voltage, comprise amplifying circuit, A/D converter and LED display module; Amplifying circuit is that load RL powers; Described amplifying circuit comprises 4 operational amplifier A 1, A2, A4 and A5 and a phase inverter A3; The in-phase input end ground connection of operational amplifier A 1, the inverting input of operational amplifier A 1 meets given voltage V1 by resistance R1; The output terminal of operational amplifier A 1 connects the in-phase input end of operational amplifier A 5 by resistance Ri; The in-phase input end of operational amplifier A 5 is the output terminal of amplifying circuit.Voltage supply circuit based on potentiometer regulation output voltage of the present utility model adopts the ripe device composition such as potentiometer, A/D converter and operational amplifier to amplify, and enlargement factor is adjustable, easy to implement, voltage is accurately adjustable, amplifying circuit designs based on negative-feedback principle, good in anti-interference performance.
Description
Technical field
The utility model relates to a kind of voltage supply circuit based on potentiometer regulation output voltage.
Background technology
Existing voltage supply circuit, its amplifying circuit is comparatively complicated, and amplifying circuit lacks feedback, easily produces fluctuation because of interference to output voltage, affects voltage output precision, therefore, is necessary to design a kind of novel voltage supply circuit.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of voltage supply circuit based on potentiometer regulation output voltage, should be easy to implement based on the voltage supply circuit of potentiometer regulation output voltage, and voltage is accurately adjustable, good in anti-interference performance.
The technical solution of utility model is as follows:
Based on a voltage supply circuit for potentiometer regulation output voltage, comprise amplifying circuit, A/D converter and LED display module; Amplifying circuit is that load RL powers;
Described amplifying circuit comprises 4 operational amplifier A 1, A2, A4 and A5 and a phase inverter A3;
The in-phase input end ground connection of operational amplifier A 1, the inverting input of operational amplifier A 1 meets given voltage V1 by resistance R1; The output terminal of operational amplifier A 1 connects the in-phase input end of operational amplifier A 5 by resistance Ri; The in-phase input end of operational amplifier A 5 is the output terminal of amplifying circuit;
The inverting input of operational amplifier A 5 and the output terminal short circuit of operational amplifier A 5; The output terminal of operational amplifier A 5 connects the inverting input of operational amplifier A 4 through variable resistor R10, the in-phase input end of operational amplifier A 4 is by resistance R11 ground connection, between the in-phase input end of operational amplifier A 4 and the output terminal of operational amplifier A 4, cross-over connection has resistance Rv, the output terminal of operational amplifier A 4 connects the in-phase input end of operational amplifier A 2 through phase inverter A3, the inverting input of operational amplifier A 2 is through resistance R5 ground connection; Between the inverting input of operational amplifier A 2 and the output terminal of operational amplifier A 2, cross-over connection has resistance R4; Resistance R7 is connected between the output terminal of operational amplifier A 2 and the inverting input of operational amplifier A 1; The resistance of resistance R4 and R5 is equal;
Variable resistor R10 adopts potentiometer.
Described LED display module is 6 Digital sum pipe display circuits.
A/D converter is conventional ripe device.
V1 can be set as 3.3V or 5V.
Beneficial effect:
Voltage supply circuit based on potentiometer regulation output voltage of the present utility model adopts the ripe device composition such as potentiometer, A/D converter and operational amplifier to amplify, and enlargement factor is adjustable, easy to implement, voltage is accurately adjustable, amplifying circuit designs based on negative-feedback principle, good in anti-interference performance.
Accompanying drawing explanation
Fig. 1 is the general structure schematic diagram of the voltage supply circuit based on potentiometer regulation output voltage.
Fig. 2 is the schematic diagram of amplifying circuit.
Embodiment
Below with reference to the drawings and specific embodiments, the utility model is described in further details:
As shown in Figure 1-2, a kind of voltage supply circuit based on potentiometer regulation output voltage, comprises amplifying circuit, A/D converter and LED display module; Amplifying circuit is that load RL powers;
Described amplifying circuit comprises 4 operational amplifier A 1, A2, A4 and A5 and a phase inverter A3;
The in-phase input end ground connection of operational amplifier A 1, the inverting input of operational amplifier A 1 meets given voltage V1 by resistance R1; The output terminal of operational amplifier A 1 connects the in-phase input end of operational amplifier A 5 by resistance Ri; The in-phase input end of operational amplifier A 5 is the output terminal of amplifying circuit;
The inverting input of operational amplifier A 5 and the output terminal short circuit of operational amplifier A 5; The output terminal of operational amplifier A 5 connects the inverting input of operational amplifier A 4 through variable resistor R10, the in-phase input end of operational amplifier A 4 is by resistance R11 ground connection, between the in-phase input end of operational amplifier A 4 and the output terminal of operational amplifier A 4, cross-over connection has resistance Rv, the output terminal of operational amplifier A 4 connects the in-phase input end of operational amplifier A 2 through phase inverter A3, the inverting input of operational amplifier A 2 is through resistance R5 ground connection; Between the inverting input of operational amplifier A 2 and the output terminal of operational amplifier A 2, cross-over connection has resistance R4; Resistance R7 is connected between the output terminal of operational amplifier A 2 and the inverting input of operational amplifier A 1; The resistance of resistance R4 and R5 is equal;
Variable resistor R10 adopts potentiometer.
Described LED display module is 6 Digital sum pipe display circuits.
The principle of work of amplifier illustrates: as Fig. 2, according to negative-feedback circuit characteristic, when circuit reaches stable and R1=R7; , any deviation of V1 and VF V1+VF=0 must be had to set up, because, all can cause feedback, automatically reach balance, finally makes V1+VF=0 set up;
Therefore have:
If R4=R5, and V1=-VF, simplify above-mentioned formula, obtain:
Because RV is fixed resistance value, R10 is variable resistor, and therefore VO can adjust according to potentiometer.
The course of work illustrates:
Changed the resistance of R10 by potentiometer by user, thus the enlargement factor of adjustment amplifying circuit, producing output voltage VO by amplifying circuit is that debt RL powers.A/D converter gathers output voltage and shows over the display.Realized the adjustment of voltage by potentiometer, this Intelligent power source is simple to operate, output voltage stabilization.
Claims (2)
1. based on a voltage supply circuit for potentiometer regulation output voltage, it is characterized in that, comprise amplifying circuit, A/D converter and LED display module; Amplifying circuit is that load RL powers;
Described amplifying circuit comprises 4 operational amplifier A 1, A2, A4 and A5 and a phase inverter A3;
The in-phase input end ground connection of operational amplifier A 1, the inverting input of operational amplifier A 1 meets given voltage V1 by resistance R1; The output terminal of operational amplifier A 1 connects the in-phase input end of operational amplifier A 5 by resistance Ri; The in-phase input end of operational amplifier A 5 is the output terminal of amplifying circuit;
The inverting input of operational amplifier A 5 and the output terminal short circuit of operational amplifier A 5; The output terminal of operational amplifier A 5 connects the inverting input of operational amplifier A 4 through variable resistor R10, the in-phase input end of operational amplifier A 4 is by resistance R11 ground connection, between the in-phase input end of operational amplifier A 4 and the output terminal of operational amplifier A 4, cross-over connection has resistance Rv, the output terminal of operational amplifier A 4 connects the in-phase input end of operational amplifier A 2 through phase inverter A3, the inverting input of operational amplifier A 2 is through resistance R5 ground connection; Between the inverting input of operational amplifier A 2 and the output terminal of operational amplifier A 2, cross-over connection has resistance R4; Resistance R7 is connected between the output terminal of operational amplifier A 2 and the inverting input of operational amplifier A 1; The resistance of resistance R4 and R5 is equal;
Variable resistor R10 adopts potentiometer.
2. the voltage supply circuit based on potentiometer regulation output voltage according to claim 1, is characterized in that, described LED display module is 6 Digital sum pipe display circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172759.8U CN204515577U (en) | 2015-03-18 | 2015-03-18 | A kind of voltage supply circuit based on potentiometer regulation output voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172759.8U CN204515577U (en) | 2015-03-18 | 2015-03-18 | A kind of voltage supply circuit based on potentiometer regulation output voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204515577U true CN204515577U (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520172759.8U Expired - Fee Related CN204515577U (en) | 2015-03-18 | 2015-03-18 | A kind of voltage supply circuit based on potentiometer regulation output voltage |
Country Status (1)
| Country | Link |
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| CN (1) | CN204515577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108399905A (en) * | 2018-05-03 | 2018-08-14 | 深圳市华星光电技术有限公司 | Display driver circuit and display drive method |
-
2015
- 2015-03-18 CN CN201520172759.8U patent/CN204515577U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108399905A (en) * | 2018-05-03 | 2018-08-14 | 深圳市华星光电技术有限公司 | Display driver circuit and display drive method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160318 |