CN204408205U - Single amplifier full-wave rectifying circuit - Google Patents
Single amplifier full-wave rectifying circuit Download PDFInfo
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- CN204408205U CN204408205U CN201520071091.8U CN201520071091U CN204408205U CN 204408205 U CN204408205 U CN 204408205U CN 201520071091 U CN201520071091 U CN 201520071091U CN 204408205 U CN204408205 U CN 204408205U
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- resistance
- operational amplifier
- rectification circuit
- wave rectifying
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Abstract
The utility model relates to electronic circuit technology field, disclose a kind of single amplifier full-wave rectifying circuit, comprise an operational amplifier, rectification circuit signal input part and rectification circuit signal output part, the inverting input of described operational amplifier is connected to described rectification circuit signal input part by the first resistance, between the output and described rectification circuit signal output part of described operational amplifier, forward arranges the first diode, is connected the second resistance at the inverting input of described operational amplifier with described rectification circuit signal output part.The utility model overcomes the shortcomings such as the temperature drift of general-purpose diode rectification circuit, the advantage such as have that circuit is simple, cost is low, Component selection is convenient and debugging is convenient.
Description
Technical field
The utility model relates to electronic circuit technology field, particularly one list amplifier full-wave rectifying circuit.
Background technology
At present, the full-wave rectifying circuit be made up of operational amplifier all can be used during most low-frequency electrostimulating therapeutic equipment development and Design company designs in hardware circuit, and be all almost the accurate full-wave rectifying circuit adopting double operational composition, and this accurate full-wave rectifying circuit also has shortcomings such as the temperature drift that can overcome general-purpose diode rectification circuit and can close to the commutating character of ideal diode.
Also there is the shortcomings such as the temperature drift that can overcome general-purpose diode rectification circuit although existing double operational forms accurate full-wave rectifying circuit and close to the commutating character of ideal diode, can exist: the shortcomings such as debugging is not too convenient, circuit more complicated, cost parameter matching that is high, related elements is cumbersome.
Utility model content
The utility model, in order to solve the problems of the technologies described above, provides a kind of single amplifier full-wave rectifying circuit, coordinates diode to realize ideal commutating character by single operational amplifier.
To achieve these goals, the utility model provides following technical scheme:
A kind of single amplifier full-wave rectifying circuit, it is characterized in that, comprise an operational amplifier, rectification circuit signal input part and rectification circuit signal output part, the inverting input of described operational amplifier is connected to described rectification circuit signal input part by the first resistance, between the output and described rectification circuit signal output part of described operational amplifier, forward arranges the first diode, is connected the second resistance at the inverting input of described operational amplifier with described rectification circuit signal output part.
Further, between the inverting input and output of described operational amplifier, forward arranges the second diode.
Further, described first resistance is equal with the resistance of the second resistance.
Further, the resistance of described first resistance and the second resistance is 10K Ω to 40K Ω.
Further, the normal phase input end of described operational amplifier connects ground connection after the 3rd resistance.
Further, the resistance of described 3rd resistance is 5K Ω to 15K Ω.
Further, the model of described operational amplifier is OPA244.
The beneficial effects of the utility model are:
(1) shortcomings such as the temperature drift of general-purpose diode rectification circuit are overcome;
(2) can close to the commutating character of ideal diode;
(3) circuit is simple, cost is low, Component selection is convenient, and debugging is convenient.
Accompanying drawing explanation
Fig. 1 is rectification circuit figure of the present utility model.
In figure: A is operational amplifier, R1 is the first resistance, R2 is the second resistance, R3 is the 3rd resistance, D1 is the first diode, D2 is the second diode, vi is rectification circuit signal input part signal, vo is rectification circuit signal output part signal.
Embodiment
Elaborate below in conjunction with the embodiment of accompanying drawing to the utility model list amplifier full-wave rectifying circuit.
See accompanying drawing 1, single amplifier full-wave rectifying circuit comprises an operational amplifier A and rectification circuit signal input part and rectification circuit signal output part, the optional OPA244 of model of operational amplifier A.The inverting input of described operational amplifier A is connected to described rectification circuit signal input part by the first resistance R1, and the normal phase input end of described operational amplifier A connects ground connection after a 3rd resistance R3.Between the output and described rectification circuit signal output part of described operational amplifier A, forward arranges the first diode D1, is connected the second resistance R2 at the inverting input of described operational amplifier A with described rectification circuit signal output part.Between the inverting input and output of described operational amplifier A, forward arranges the second diode D2.Described first resistance R1 is equal with the resistance of the second resistance R2, is 10K Ω to 40K Ω, preferred 20K Ω, and the resistance of described 3rd resistance R3 is 5K Ω to 15K Ω, preferred 10K Ω.
Below for sine wave signal as input signal, circuit theory of the present utility model is described, when rectification circuit signal input part signal Vi is timing, it is negative that the amplifier of operational amplifier A exports, first diode D1 ends, now amplifier and the first diode D1 inoperative to Vi, Vi directly by the first resistance R1, the second resistance R2 to rectification circuit signal output part signal Vo, so Vo=Vi; When Vi is for time negative, it is that just the first diode D1 conducting, now circuit is equivalent to reverse proportional amplifier, Vo=-(R2/R1) * Vi=-Vi that amplifier exports.Therefore, when being input as alternating voltage, exporting as full-wave direct current voltage, achieving rectification function.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (7)
1. a single amplifier full-wave rectifying circuit, it is characterized in that: comprise an operational amplifier, rectification circuit signal input part and rectification circuit signal output part, the inverting input of described operational amplifier is connected to described rectification circuit signal input part by the first resistance, between the output and described rectification circuit signal output part of described operational amplifier, forward arranges the first diode, is connected the second resistance at the inverting input of described operational amplifier with described rectification circuit signal output part.
2. single amplifier full-wave rectifying circuit according to claim 1, is characterized in that: between the inverting input and output of described operational amplifier, forward arranges the second diode.
3. single amplifier full-wave rectifying circuit according to claim 1 and 2, is characterized in that: described first resistance is equal with the resistance of the second resistance.
4. single amplifier full-wave rectifying circuit according to claim 3, is characterized in that: the resistance of described first resistance and the second resistance is 10K Ω to 40K Ω.
5. single amplifier full-wave rectifying circuit according to claim 1 and 2, is characterized in that: the normal phase input end of described operational amplifier connects ground connection after the 3rd resistance.
6. single amplifier full-wave rectifying circuit according to claim 5, is characterized in that: the resistance of described 3rd resistance is 5K Ω to 15K Ω.
7. single amplifier full-wave rectifying circuit according to claim 1 and 2, is characterized in that: the model of described operational amplifier is OPA244.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520071091.8U CN204408205U (en) | 2015-01-26 | 2015-01-26 | Single amplifier full-wave rectifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520071091.8U CN204408205U (en) | 2015-01-26 | 2015-01-26 | Single amplifier full-wave rectifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204408205U true CN204408205U (en) | 2015-06-17 |
Family
ID=53432035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520071091.8U Active CN204408205U (en) | 2015-01-26 | 2015-01-26 | Single amplifier full-wave rectifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204408205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113472335A (en) * | 2021-07-12 | 2021-10-01 | 电子科技大学 | One-way conduction circuit of alternating current signal |
-
2015
- 2015-01-26 CN CN201520071091.8U patent/CN204408205U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113472335A (en) * | 2021-07-12 | 2021-10-01 | 电子科技大学 | One-way conduction circuit of alternating current signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Patent of Shenzhen Xinghui Technology Co.,Ltd. The person in charge Document name: Notice on Approval of Expense Reduction |