CN205921562U - Single mains operated operational amplifier circuit - Google Patents
Single mains operated operational amplifier circuit Download PDFInfo
- Publication number
- CN205921562U CN205921562U CN201620787164.8U CN201620787164U CN205921562U CN 205921562 U CN205921562 U CN 205921562U CN 201620787164 U CN201620787164 U CN 201620787164U CN 205921562 U CN205921562 U CN 205921562U
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- CN
- China
- Prior art keywords
- operational amplifier
- resistance
- zener diode
- electric capacity
- utility
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 1
- 230000009977 dual effect Effects 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to a single mains operated operational amplifier circuit belongs to the electronic integrated circuit field. The utility model discloses a power VCC, electric capacity C1, resistance R1, resistance R2, zener diode dw, operational amplifier U, external input is gone into by the operational amplifier U non inverting input termination, and operational amplifier U's reverse input end is connected with resistance R1, R2's one end simultaneously, and the resistance R1 other end is connected with the operational amplifier U output, and the resistance R2 other end inserts zener diode dw's negative pole and electric capacity C1's positive pole to orientate as the zero reference point, zener diode dw's positive pole and electric capacity C1's negative pole are gone into to operational amplifier U negative supply termination. The utility model discloses the operational amplifier who enables dual power supply realizes alternating current signal's enlarging function under single mains operated circumstances, the original paper is less, connects simply, and whole circuit volume is less, the reliable operation. Improved the performance, convenient and fast has extended operational amplifier's application range.
Description
Technical field
This utility model is related to a kind of single supply and powers operational amplification circuit, belongs to electronic integrated circuit technical field.
Background technology
Operational amplifier commonly uses in our life, and the use of wherein most operational amplifiers needs dual power supply to supply
Electricity.By the improvement to circuit, for realizing use under single supply electric power thus supplied for the dual power supply operational amplifier, Yi Zhongdan
Power supply operational amplification circuit of powering is suggested.
Content of the invention
The technical problems to be solved in the utility model is: this utility model provide a kind of single supply power operation amplifier electricity
Road, for solving the problems, such as that most of operational amplifiers need dual power supply, simplifies circuit, original paper is less, whole circuit
Small volume, convenient and swift, reliable operation, so that the range of operational amplifier is expanded.
Technical solutions of the utility model are: a kind of single supply is powered operational amplification circuit, including power supply vcc, electric capacity c1,
Resistance r1, resistance r2, Zener diode dw, operational amplifier u；
Described positive source is connected into operational amplifier u positive power source terminal, and negative pole is connected into operational amplifier u negative power end, external
Input accessed by operational amplifier u in-phase input end, the reverse input end of operational amplifier u simultaneously with resistance r1, r2
One end connects, and the resistance r1 other end is connected with operational amplifier u outfan, and the resistance r2 other end is concurrently accessed Zener diode dw
Negative electrode and electric capacity c1 anode, and orientate zero reference point as, operational amplifier u negative power end is concurrently accessed Zener diode dw
Anode and electric capacity c1 negative electrode.
Operation principle of the present utility model is:
Zero reference point is positioned at Zener diode dw one end and the junction of electric capacity c1 one end by this utility model, thus
Under single supply electric power thus supplied, the negative power end of operational amplifier u forms a negative voltage, is equivalent to one in-phase proportion fortune of composition
Calculate amplifying circuit, realize dual power supply operational amplifier and normally use in the case that single supply is powered.
The beneficial effects of the utility model are: this utility model provides a kind of single supply to power operational amplification circuit, solves
Most operational amplifiers need the problem of dual power supply, simplify circuit, original paper is less, whole circuit small volume, side
Just quick, reliable operation, so that the range of operational amplification circuit is expanded.
Brief description
Fig. 1 is this utility model circuit theory diagrams.
Wherein c1 is electrochemical capacitor, and r1, r2 are resistance, and dw is Zener diode, and vcc is power supply, and u is operational amplifier.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the utility model is described in further detail.
Embodiment 1: the operational amplification circuit as shown in figure 1, a kind of single supply is powered, including power supply vcc, electric capacity c1, resistance
R1, resistance r2, Zener diode dw, operational amplifier u；
Described positive source is connected into operational amplifier u positive power source terminal, and negative pole is connected into operational amplifier u negative power end, external
Input accessed by operational amplifier u in-phase input end, the reverse input end of operational amplifier u simultaneously with resistance r1, r2
One end connects, and the resistance r1 other end is connected with operational amplifier u outfan, and the resistance r2 other end is concurrently accessed Zener diode dw
Negative electrode and electric capacity c1 anode, and orientate zero reference point as, operational amplifier u negative power end is concurrently accessed Zener diode dw
Anode and electric capacity c1 negative electrode.
Operation principle of the present utility model is:
Zero reference point is positioned at Zener diode dw one end and the junction of electric capacity c1 one end by this utility model, thus
Under single supply electric power thus supplied, the negative power end of operational amplifier u forms a negative voltage, is equivalent to one in-phase proportion fortune of composition
Calculate amplifying circuit, realize dual power supply operational amplifier and normally use in the case that single supply is powered.
Above in conjunction with accompanying drawing, specific embodiment of the utility model is explained in detail, but this utility model does not limit
In above-described embodiment, in the ken that those of ordinary skill in the art possess, can also be without departing from this utility model
On the premise of objective, various changes can be made.
Claims (1)
1. a kind of single supply power operational amplification circuit it is characterised in that: include power supply vcc, electric capacity c1, resistance r1, resistance
R2, Zener diode dw, operational amplifier u；
Described positive source is connected into operational amplifier u positive power source terminal, and negative pole is connected into operational amplifier u negative power end, and external is defeated
Enter end to be accessed by operational amplifier u in-phase input end, reverse input end one end with resistance r1, r2 simultaneously of operational amplifier u
Connect, the resistance r1 other end is connected with operational amplifier u outfan, and the resistance r2 other end is concurrently accessed the moon of Zener diode dw
Pole and the anode of electric capacity c1, and orientate zero reference point as, operational amplifier u negative power end is concurrently accessed the sun of Zener diode dw
Pole and the negative electrode of electric capacity c1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620787164.8U CN205921562U (en) | 2016-07-26 | 2016-07-26 | Single mains operated operational amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620787164.8U CN205921562U (en) | 2016-07-26 | 2016-07-26 | Single mains operated operational amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205921562U true CN205921562U (en) | 2017-02-01 |
Family
ID=57872697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620787164.8U Expired - Fee Related CN205921562U (en) | 2016-07-26 | 2016-07-26 | Single mains operated operational amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205921562U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257039A (en) * | 2018-10-08 | 2019-01-22 | 北方电子研究院安徽有限公司 | A kind of voltage level conversion device |
| CN112533431A (en) * | 2020-12-04 | 2021-03-19 | 深圳市智仁科技有限公司 | Anti-loosening PCBA mainboard |
-
2016
- 2016-07-26 CN CN201620787164.8U patent/CN205921562U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257039A (en) * | 2018-10-08 | 2019-01-22 | 北方电子研究院安徽有限公司 | A kind of voltage level conversion device |
| CN112533431A (en) * | 2020-12-04 | 2021-03-19 | 深圳市智仁科技有限公司 | Anti-loosening PCBA mainboard |
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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: 20170201 Termination date: 20180726 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |