CN203027207U - Operational amplifying circuit with capacitive load - Google Patents
Operational amplifying circuit with capacitive load Download PDFInfo
- Publication number
- CN203027207U CN203027207U CN 201220636084 CN201220636084U CN203027207U CN 203027207 U CN203027207 U CN 203027207U CN 201220636084 CN201220636084 CN 201220636084 CN 201220636084 U CN201220636084 U CN 201220636084U CN 203027207 U CN203027207 U CN 203027207U
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- CN
- China
- Prior art keywords
- operational amplifier
- capacitive load
- amplifier
- resistance
- amplifying circuit
- Prior art date
- 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
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Abstract
The utility model provides an operational amplifying circuit with capacitive load. An operational amplifier U1 is a double-power operational amplifier. An in-phase end of the operational amplifier U1 is connected with a signal input end through a resistor R1. An inverse phase end of the operational amplifier U1 is earthed through a resistor R2. A resistor R4 and a capacitor C1 are connected in series and then are connected with a resistor R3 between the in-phase end of the operational amplifier U1 and an output end of the operational amplifier U1 in parallel. The output end of the operational amplifier U1 is earthed through a capacitor C2. The operational amplifying circuit with the capacitive load solves the problem of self-excitation generated in the application process of the operational amplifier, and improves reliability.
Description
Technical field
The utility model relates to the amplifier applied technical field, particularly a kind of discharge circuit with capacitive load.
Background technology
Amplifier is easy to produce self-excitation under a lot of capacitive load conditions, cause circuit unavailable, the more serious circuit that even directly burns.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of discharge circuit with capacitive load, changes the zero limit of circuit by series resistance, makes the discharge circuit steady operation.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of discharge circuit with capacitive load, amplifier U1 is the duplicate supply amplifier, its in-phase end connects the signal input by resistance R 1, end of oppisite phase is by resistance R 2 ground connection, after resistance R 4 is connected with capacitor C 1, with resistance R 3 and being connected between amplifier U1 in-phase end and output, the output of amplifier U1 passes through capacitor C 2 ground connection.
Compared with prior art, the utility model has solved the self-excitation problem that produces in the amplifier application, has improved reliability.
Description of drawings
Accompanying drawing is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is carried out more detailed explanation.
As shown in the figure, the utility model is a kind of discharge circuit with capacitive load, amplifier U1 is the duplicate supply amplifier, its in-phase end connects the signal input by resistance R 1, end of oppisite phase is by resistance R 2 ground connection, after resistance R 4 is connected with capacitor C 1, with resistance R 3 and being connected between amplifier U1 in-phase end and output, the output of amplifier U1 passes through capacitor C 2 ground connection.
In the utility model, input signal is through the amplification of amplifier U1, output Vout, its load is capacitor C 2, Vout through R3 R4 the feedback network that forms of C1, feed back to input, adjust Vout, guarantee the amplifying power of circuit and can suppress certain interference.
The general feedback network that only forms with electric capacity C1 and resistance R 3 in available circuit, it is a limit for whole loop, and the utility model is introduced the impact of offsetting whole limit a zero point by introducing resistance R 4, abolishes the gain condition that self-excitation produces condition, arrives the purpose of stablizing loop.
Claims (1)
1. discharge circuit with capacitive load, amplifier U1 is the duplicate supply amplifier, its in-phase end connects the signal input by resistance R 1, end of oppisite phase is by resistance R 2 ground connection, it is characterized in that, after resistance R 4 is connected with capacitor C 1, with resistance R 3 and being connected between amplifier U1 in-phase end and output, the output of amplifier U1 passes through capacitor C 2 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220636084 CN203027207U (en) | 2012-11-26 | 2012-11-26 | Operational amplifying circuit with capacitive load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220636084 CN203027207U (en) | 2012-11-26 | 2012-11-26 | Operational amplifying circuit with capacitive load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203027207U true CN203027207U (en) | 2013-06-26 |
Family
ID=48651150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220636084 Expired - Fee Related CN203027207U (en) | 2012-11-26 | 2012-11-26 | Operational amplifying circuit with capacitive load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203027207U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528557A (en) * | 2017-09-07 | 2017-12-29 | 清华大学 | A kind of operational amplifier of data-driven |
-
2012
- 2012-11-26 CN CN 201220636084 patent/CN203027207U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528557A (en) * | 2017-09-07 | 2017-12-29 | 清华大学 | A kind of operational amplifier of data-driven |
| CN107528557B (en) * | 2017-09-07 | 2021-03-02 | 清华大学 | Data-driven operational amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20131126 |