CN201726320U - Precision rectifier circuit - Google Patents
Precision rectifier circuit Download PDFInfo
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- CN201726320U CN201726320U CN2010202067766U CN201020206776U CN201726320U CN 201726320 U CN201726320 U CN 201726320U CN 2010202067766 U CN2010202067766 U CN 2010202067766U CN 201020206776 U CN201020206776 U CN 201020206776U CN 201726320 U CN201726320 U CN 201726320U
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- operational amplifier
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Abstract
The utility model relates to a precision rectifier circuit, which comprises an inverted proportional operational circuit and a voltage follower circuit in parallel connection. The inverted proportional operational circuit comprises a resistor R0, a resistor R1, a diode D1, a diode D2, an operational amplifier U1 in connection. The voltage follower circuit comprises a resistor R2, a resistor R3, a diode D3, a diode D4 and an operational amplifier U2 in connection. The precision rectifier circuit is simple in structure, reasonable in design and high in practicality, is applicable to signal precision rectification of various occasions, and is low in manufacturing cost, high in interference resistance, high in rectification result precision, stable and reliable in performance, and wide in application range.
Description
Technical field
The utility model relates to a kind of rectification circuit, particularly a kind of precise rectification circuit.
Background technology
At present, in general rectification circuit, because the pressure drop of diode forward conducting causes the poor accuracy of signal after the rectification, like this, rectification circuit just can not obtain rectified signal accurately, thereby makes testing result inaccurate, make the bad adaptability of circuit, the scope of application is little, and rectification result accurately can't be provided, and this will certainly cause the use limitation of design circuit.
Therefore, provide a kind of circuit simple, reasonable in design, use easy, obvious results precise rectification circuit, be one of these those skilled in the art problem that should address.
The utility model content
The purpose of this utility model is to overcome above-mentioned weak point, and a kind of circuit advantages of simple, performance is safe and reliable, applicability is strong precise rectification circuit are provided.
The technical scheme that the utility model adopted is for achieving the above object: a kind of precise rectification circuit is characterized in that: this circuit is composed in parallel by anti-phase scale operation circuit and voltage follower circuit; Described anti-phase scale operation circuit is connected to form by resistance R 0, R1, diode D1, D2, operational amplifier U1; Described voltage follower circuit is connected to form by resistance R 2, R3, diode D3, D4, operational amplifier U2; One termination circuit input of the resistance R 0 in the described anti-phase scale operation circuit, the inverting input of another termination operational amplifier U1 of resistance R 0, the anode of diode D1, an end of resistance R 1, the negative electrode of diode D1 connects the output of operational amplifier U1, the anode of diode D2, the in-phase input end ground connection of operational amplifier U1, the end of the negative electrode of another terminating diode D2, the D4 of resistance R 1, resistance R 2, R3, R4; The in-phase input end connection circuit input of operational amplifier U2 in the described voltage follower circuit, the inverting input of operational amplifier U2 connects the anode of diode D3, the other end of resistance R 2, the negative electrode of the output terminating diode D3 of operational amplifier U2, the anode of diode D4, the other end ground connection of resistance R 3, the other end connection circuit output of resistance R 4.
The beneficial effects of the utility model are: its circuit structure is simple, and is reasonable in design, practical, can be suitable for the rectification circuit of various requirement, and it is the precision height as a result; Low cost of manufacture be difficult for to be disturbed other circuit or is disturbed by other circuit; And stable and reliable for performance, have wide range of applications.
Description of drawings
Fig. 1 is the schematic diagram of the utility model circuit.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:
Referring to Fig. 1, a kind of precise rectification circuit, this circuit is composed in parallel by anti-phase scale operation circuit and voltage follower circuit; Described anti-phase scale operation circuit is connected to form by resistance R 0, R1, diode D1, D2, operational amplifier U1; Described voltage follower circuit is connected to form by resistance R 2, R3, diode D3, D4, operational amplifier U2.
The circuit connection specifies as follows: a termination circuit input of the resistance R 0 in the described anti-phase scale operation circuit, the inverting input of another termination operational amplifier U1 of resistance R 0, the anode of diode D1, an end of resistance R 1, the negative electrode of diode D1 connects the output of operational amplifier U1, the anode of diode D2, the in-phase input end ground connection of operational amplifier U1, the end of the negative electrode of another terminating diode D2, the D4 of resistance R 1, resistance R 2, R3, R4; The in-phase input end connection circuit input of operational amplifier U2 in the described voltage follower circuit, the inverting input of operational amplifier U2 connects the anode of diode D3, the other end of resistance R 2, the negative electrode of the output terminating diode D3 of operational amplifier U2, the anode of diode D4, the other end ground connection of resistance R 3, the other end connection circuit output of resistance R 4.
Main component parameter is for example selected:
The resistance of resistance parameter: R0, R1, R3 is 10k Ω, and the R2 resistance is 100k Ω, and the R4 resistance is 2k Ω; (wherein the resistance of R0, R1, R3 equates)
Diode D1, D2, D3, D4 model are 4148;
Operational amplifier U1, U2 model are LF347.
Operation principle: this circuit is provided with an input, an output.This circuit is divided into two parts, first is anti-phase scale operation circuit: when input signal is timing, input signal inserts the inverting input of the U1 of operational amplifier through resistance R 0, the in-phase input end ground connection of U1, the output of operational amplifier U1 is opposite with the input signal of inverting input, be negative, diode D1 conducting this moment, diode D2 ends, then anti-phase scale operation circuit no-output, when input signal when negative, the output of operational amplifier U1 is for just, this moment, diode D1 ended diode D2 conducting, then anti-phase scale operation normal operation circuit, promptly when input signal when negative, anti-phase scale operation circuit output is anti-phase with input signal, is positive signal, otherwise no signal output; Second portion is a voltage follower circuit: when input signal is timing, circuit input end inserts the in-phase input end of operational amplifier U2, the inverting input of operational amplifier U2 meets series resistance R3, ground connection behind the R4, the output of operational amplifier U2 is identical with the input signal of its in-phase input end, just be, this moment, diode D3 ended, diode D4 conducting, and voltage follower circuit normally moves, when input signal when negative, the output of operational amplifier U2 is negative, diode D3 conducting this moment, and diode D4 ends, the voltage follower circuit no-output, promptly working as input signal is timing, and voltage follower circuit output is identical with input signal, otherwise no signal output.Resistance R 4 is inserted in the continuous back of the output of above-mentioned two parts, and getting circuit output signal is the precision rectifying result of input signal.
Above-mentionedly with reference to example this precise rectification circuit being described in detail, is illustrative rather than determinate, therefore in the variation and the modification that do not break away under the utility model general plotting, should belong within the protection range of the present utility model.
Claims (1)
1. precise rectification circuit, it is characterized in that: this circuit is composed in parallel by anti-phase scale operation circuit and voltage follower circuit; Described anti-phase scale operation circuit is connected to form by resistance R 0, R1, diode D1, D2, operational amplifier U1; Described voltage follower circuit is connected to form by resistance R 2, R3, diode D3, D4, operational amplifier U2; One termination circuit input of the resistance R 0 in the described anti-phase scale operation circuit, the inverting input of another termination operational amplifier U1 of resistance R 0, the anode of diode D1, an end of resistance R 1, the negative electrode of diode D1 connects the output of operational amplifier U1, the anode of diode D2, the in-phase input end ground connection of operational amplifier U1, the end of the negative electrode of another terminating diode D2, the D4 of resistance R 1, resistance R 2, R3, R4; The in-phase input end connection circuit input of operational amplifier U2 in the described voltage follower circuit, the inverting input of operational amplifier U2 connects the anode of diode D3, the other end of resistance R 2, the negative electrode of the output terminating diode D3 of operational amplifier U2, the anode of diode D4, the other end ground connection of resistance R 3, the other end connection circuit output of resistance R 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202067766U CN201726320U (en) | 2010-05-28 | 2010-05-28 | Precision rectifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202067766U CN201726320U (en) | 2010-05-28 | 2010-05-28 | Precision rectifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201726320U true CN201726320U (en) | 2011-01-26 |
Family
ID=43494673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202067766U Expired - Fee Related CN201726320U (en) | 2010-05-28 | 2010-05-28 | Precision rectifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201726320U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278672A (en) * | 2013-06-17 | 2013-09-04 | 成都荣耀科技有限公司 | Signal acquisition circuit used in distribution transformer remote monitoring system |
| CN103675713A (en) * | 2013-12-25 | 2014-03-26 | 施耐德万高（天津）电气设备有限公司 | Alternate-current sampling conversion circuit |
| CN106685247A (en) * | 2017-01-12 | 2017-05-17 | 中国科学院地质与地球物理研究所 | Precise rectification system for weak small signals |
-
2010
- 2010-05-28 CN CN2010202067766U patent/CN201726320U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278672A (en) * | 2013-06-17 | 2013-09-04 | 成都荣耀科技有限公司 | Signal acquisition circuit used in distribution transformer remote monitoring system |
| CN103675713A (en) * | 2013-12-25 | 2014-03-26 | 施耐德万高（天津）电气设备有限公司 | Alternate-current sampling conversion circuit |
| CN106685247A (en) * | 2017-01-12 | 2017-05-17 | 中国科学院地质与地球物理研究所 | Precise rectification system for weak small signals |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN NOLE ELECTRICITY CO., LTD. Free format text: FORMER NAME: TIANJIN NUOERHADUN ELECTRIC CO., LTD. Owner name: TIANJIN NUOERHADUN ELECTRIC CO., LTD. Free format text: FORMER NAME: TIANJIN NOLE ELECTRICITY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 300385 Tianjin City Economic Development Zone Xiqing Dasi Industrial Park Jintai Road No. 6 Patentee after: TIANJIN NOLE ELECTRIC Co.,Ltd. Address before: 300385 Tianjin City Economic Development Zone Xiqing Dasi Industrial Park Jintai Road No. 6 Patentee before: Tianjin Knoll Hatton Electric Co.,Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 300385 Tianjin City Economic Development Zone Xiqing Dasi Industrial Park Jintai Road No. 6 Patentee after: Tianjin Knoll Hatton Electric Co.,Ltd. Address before: 300381 Tianjin City, Xiqing Economic Development Zone Industrial Park Ze Road No. 20 Hung Temple Patentee before: Tianjin Nuoerhatun Electric Manufacturing Co.,Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Precise rectification circuit Effective date of registration: 20140714 Granted publication date: 20110126 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd. Tianjin branch Pledgor: TIANJIN NOLE ELECTRIC Co.,Ltd. Registration number: 2014120000034 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20150528 |
|
| EXPY | Termination of patent right or utility model |