CN101702584A - Precise amplification, rectification and filtering circuit - Google Patents
Precise amplification, rectification and filtering circuit Download PDFInfo
- Publication number
- CN101702584A CN101702584A CN200910252821A CN200910252821A CN101702584A CN 101702584 A CN101702584 A CN 101702584A CN 200910252821 A CN200910252821 A CN 200910252821A CN 200910252821 A CN200910252821 A CN 200910252821A CN 101702584 A CN101702584 A CN 101702584A
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- operational amplifier
- rectification
- capacitor
- 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.)
- Pending
Links
Landscapes
- Networks Using Active Elements (AREA)
Abstract
The invention relates to a precise amplification, rectification and filtering circuit. The circuit is formed by connecting an amplification circuit, a rectification circuit and a filtering circuit, wherein the amplification circuit is formed by connecting resistors R2, R3, R4 and R5 and an operational amplifier U1D; the precise rectification circuit is formed by connecting resistors R6, R7, R8, R9, R10 and R11, a diode group D20, capacitors C1 and C2 and operational amplifiers U1B and U1C; and the filtering circuit is formed by connecting resistors R0 and R1, capacitors C0, C1, C2 and C3 and a resistor R12. The invention has simple circuit structure, reasonable design and strong practicability and is suitable for the output signals of sensors with various transformation ratios; in addition, the invention has low manufacturing cost, strong anti-interference capability, adjustable circuit, stable and reliable performance and extensive application range.
Description
Technical field
The present invention relates to a kind of rectification circuit, particularly a kind of precise amplification, rectification and filtering circuit.
Background technology
At present, in general rectification circuit, because adjustable amplifying circuit is not set, every kind of rectification circuit is only applicable to the signal of fixing input, like this when design circuit, will change the device of different model to different signals, make troubles to circuit design, the bad adaptability of circuit, there is the problem to the input signal amplitude limit in the partial rectification circuit, if amplitude limit, there is distorted signals in the rectification output signal of output signal behind over commutation and anticipation, and this will certainly cause the use limitation of design circuit.
Therefore, provide a kind of simple in structure, reasonable in design, use easy, obvious results precise amplification, rectification and filtering circuit, be one of these those skilled in the art problem that should address.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, a kind of circuit advantages of simple, performance is safe and reliable, applicability is strong precise amplification, rectification and filtering circuit are provided.
The technical solution adopted in the present invention is for achieving the above object: a kind of precise amplification, rectification and filtering circuit is characterized in that: this circuit is connected to form by limiting filter circuit, amplifying circuit and rectification circuit; One of resistance R 0 in the described limiting filter circuit, R1 terminates to input, the other end ground connection of resistance R 0, the other end connecting resistance R2 of resistance R 1, an end of capacitor C 0, the other end ground connection of capacitor C 0; The end of the other end difference connecting resistance R4 of the resistance R 2 in the described amplifying circuit, the reverse input end of operational amplifier U1D, the end of the other end connecting resistance R5 of resistance R 4, the output of another termination operational amplifier U1D of resistance R 5, the positive input of one termination operational amplifier U1D of resistance R 3, its other end ground connection; The output of resistance R 6 one termination operational amplifier U1D in the described rectification circuit, the reverse input end of another termination operational amplifier U1C of resistance R 6, one end ground connection of resistance R 7, the positive input of its another termination operational amplifier U1C, resistance R 8, the end of R9 connects the reverse of operational amplifier U1C respectively, positive input, the other end of resistance R 8 connects 1 pin of diode group D20 respectively, resistance R 10, one end of capacitor C 1, the other end of resistance R 9 connects 2 pins of diode group D20 respectively, one end of capacitor C 2, the positive input of operational amplifier U1B, 3 pins of the output terminating diode group D20 of operational amplifier U1C, capacitor C 1, the other end of C2, the other end of resistance R 10 is the end of connecting resistance R11 respectively, the reverse input end of operational amplifier U1B, the output connecting resistance R11 of operational amplifier U1B, the end of R12; One end of another termination capacitor C 3 of the resistance R 12 in another part filter circuit, output IV, the other end ground connection of capacitor C 3.
The invention has the beneficial effects as follows: its circuit structure is simple, and is reasonable in design, practical, can be suitable for the sensor output signal of various no-load voltage ratios; Antijamming capability is strong, is suitable for strong operability; Low cost of manufacture uses energy consumption low, is difficult for disturbing other circuit or is disturbed by other circuit; And circuit is adjustable, and is stable and reliable for performance, has wide range of applications.
Description of drawings
Fig. 1 is the schematic diagram of circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, details are as follows for feature:
Referring to Fig. 1, a kind of precise amplification, rectification and filtering circuit, this circuit is connected to form by limiting filter circuit, amplifying circuit and rectification circuit; One of resistance R 0 in the described limiting filter circuit, R1 terminates to input, the other end ground connection of resistance R 0, the other end connecting resistance R2 of resistance R 1, an end of capacitor C 0, the other end ground connection of capacitor C 0; The end of the other end difference connecting resistance R4 of the resistance R 2 in the described amplifying circuit, the reverse input end of operational amplifier U1D, the end of the other end connecting resistance R5 of resistance R 4, the output of another termination operational amplifier U1D of resistance R 5, the positive input of one termination operational amplifier U1D of resistance R 3, its other end ground connection; The output of resistance R 6 one termination operational amplifier U1D in the described rectification circuit, the reverse input end of another termination operational amplifier U1C of resistance R 6, one end ground connection of resistance R 7, the positive input of its another termination operational amplifier U1C, resistance R 8, the end of R9 connects the reverse of operational amplifier U1C respectively, positive input, the other end of resistance R 8 connects 1 pin of diode group D20 respectively, resistance R 10, one end of capacitor C 1, the other end of resistance R 9 connects 2 pins of diode group D20 respectively, one end of capacitor C 2, the positive input of operational amplifier U1B, 3 pins of the output terminating diode group D20 of operational amplifier U1C, capacitor C 1, the other end of C2, the other end of resistance R 10 is the end of connecting resistance R11 respectively, the reverse input end of operational amplifier U1B, the output connecting resistance R11 of operational amplifier U1B, the end of R12; One end of another termination capacitor C 3 of the resistance R 12 in another part filter circuit, output IV, the other end ground connection of capacitor C 3.
Main component parameter is for example selected:
Resistance is difference 10K Ω or 300 Ω;
Capacitance is respectively 0.001 μ F or 3.3pF or 0.01 μ F;
Diode D20 model is BAS40-04;
The operational amplifier model is LF347.
Operation principle: this circuit is provided with two inputs, output and power supply positive-negative input end.Circuit is divided into three parts, first is the input adjustment member, be filter amplification circuit: after the input signal input, through resistance R 0, R1 shunting, again by capacitor C 0 filtering, then by resistance R 2, R4, R5 and operational amplifier U1D to importing reverse amplification, by resistance R 4, R5 scalable multiplication factor;
Second portion is a rectification circuit: when prime is input as timing, input inserts the inverting input of operational amplifier U1C, the normal phase input end connecting resistance R7 of operational amplifier U1C, resistance R 7 ground connection, operational amplifier U1C be output as reverse input end input signal oppositely, be negative, diode 1 conducting this moment, diode 2 ends, capacitor C 1, C2 plays the effect of buffering filtering, signal oppositely is at the reverse input end that inserts U1B through resistance R 10, receive the reverse input end of U1C behind the positive input connecting resistance R9 of U1B, this current potential is zero at this moment, is similar to the positive input ground connection of U1B, the resistance of resistance R 10 and resistance R 11 equates, so the output signal of U1B equal U1B the reverse input end input signal oppositely, through twice oppositely after, when input signal is timing, still just export, multiplication factor is by resistance R 1, R2 and R4, the multiple relation decision of R5; When prime is input as when negative, the output output signal of operational amplifier U1C is for just, this moment, diode 1 ended, diode 2 conductings, the electric current that the electric current of the road inflow U1C reverse input end of each equals to flow out, operational amplifier U1B just again, the reverse input end current potential equates, the output output signal that can calculate U1B be resistance R 6 primes input signal oppositely, thereby reach the purpose of full-wave rectification, owing to select diode 1 for use, 2 tube voltage drop has only 0.2V, as long as input voltage produces very small variation, all can change its operating state, thereby reach the purpose of precision rectifying.Third part is a filter circuit, i.e. the filter circuit formed respectively of capacitor C 1, C2 and resistance R 12, capacitor C 3.
Above-mentionedly with reference to example this precise amplification, rectification and filtering circuit being described in detail, is illustrative rather than determinate, therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (1)
1. precise amplification, rectification and filtering circuit, it is characterized in that: this circuit is connected to form by limiting filter circuit, amplifying circuit and rectification circuit; One of resistance R 0 in the described limiting filter circuit, R1 terminates to input, the other end ground connection of resistance R 0, the other end connecting resistance R2 of resistance R 1, an end of capacitor C 0, the other end ground connection of capacitor C 0; The end of the other end difference connecting resistance R4 of the resistance R 2 in the described amplifying circuit, the reverse input end of operational amplifier U1D, the end of the other end connecting resistance R5 of resistance R 4, the output of another termination operational amplifier U1D of resistance R 5, the positive input of one termination operational amplifier U1D of resistance R 3, its other end ground connection; The output of resistance R 6 one termination operational amplifier U1D in the described rectification circuit, the reverse input end of another termination operational amplifier U1C of resistance R 6, one end ground connection of resistance R 7, the positive input of its another termination operational amplifier U1C, resistance R 8, the end of R9 connects the reverse of operational amplifier U1C respectively, positive input, the other end of resistance R 8 connects 1 pin of diode group D20 respectively, resistance R 10, one end of capacitor C 1, the other end of resistance R 9 connects 2 pins of diode group D20 respectively, one end of capacitor C 2, the positive input of operational amplifier U1B, 3 pins of the output terminating diode group D20 of operational amplifier U1C, capacitor C 1, the other end of C2, the other end of resistance R 10 is the end of connecting resistance R11 respectively, the reverse input end of operational amplifier U1B, the output connecting resistance R11 of operational amplifier U1B, the end of R12; One end of another termination capacitor C 3 of the resistance R 12 in another part filter circuit, output IV, the other end ground connection of capacitor C 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252821A CN101702584A (en) | 2009-11-28 | 2009-11-28 | Precise amplification, rectification and filtering circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252821A CN101702584A (en) | 2009-11-28 | 2009-11-28 | Precise amplification, rectification and filtering circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101702584A true CN101702584A (en) | 2010-05-05 |
Family
ID=42157483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910252821A Pending CN101702584A (en) | 2009-11-28 | 2009-11-28 | Precise amplification, rectification and filtering circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101702584A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923189A (en) * | 2012-10-11 | 2013-02-13 | 吉林大学 | Controller and control method for electric power steering system based on permanent magnet synchronous motor |
| 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 |
| CN107425819A (en) * | 2017-05-17 | 2017-12-01 | 山东建筑大学 | A kind of positive and negative gain is adjustable respectively and output is positive amplifying circuit |
-
2009
- 2009-11-28 CN CN200910252821A patent/CN101702584A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923189A (en) * | 2012-10-11 | 2013-02-13 | 吉林大学 | Controller and control method for electric power steering system based on permanent magnet synchronous motor |
| 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 |
| CN107425819A (en) * | 2017-05-17 | 2017-12-01 | 山东建筑大学 | A kind of positive and negative gain is adjustable respectively and output is positive amplifying circuit |
| CN107425819B (en) * | 2017-05-17 | 2020-10-27 | 山东建筑大学 | Amplifying circuit with respectively adjustable positive and negative gains and positive output |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105182061B (en) | A kind of AC current collecting circuit that ceramic machinery equipment uses | |
| CN103884445A (en) | Circuit for detecting temperature of power module of driver | |
| CN104639094A (en) | Filtering circuit | |
| CN101702584A (en) | Precise amplification, rectification and filtering circuit | |
| CN201608654U (en) | Precision amplifying, rectifying and filtering circuit | |
| CN205037982U (en) | Utilize constant current source temperature detection circuit of operational amplifier characteristic | |
| CN105553453B (en) | A kind of automatically controlled temperature switch circuit | |
| CN102012475A (en) | Leakage current detection circuit of circuit | |
| CN201078757Y (en) | Electric leakage and electric larceny recognition indicating circuit for single phase AC power supply circuitry | |
| CN203422416U (en) | High-end current detection circuit | |
| CN101776932B (en) | Precision voltage adjusting circuit | |
| CN101719761B (en) | Precise frequency tracking circuit | |
| CN104270108A (en) | Charge amplifier | |
| CN204349936U (en) | A kind of filter circuit | |
| CN201608649U (en) | Pulse width modulation signal conversion voltage circuit | |
| CN101764511B (en) | Pulse width modulation signal voltage converting circuit | |
| CN206281870U (en) | Acceleration transducer | |
| CN204188694U (en) | A kind of current detection circuit of Electric Machine Control | |
| CN201726320U (en) | Precision rectifier circuit | |
| CN208458665U (en) | A kind of Precision positioning circuit | |
| CN102722202A (en) | Voltage-current conversion circuit | |
| CN201876512U (en) | Circuit leakage current detecting circuit | |
| CN201571029U (en) | Precise frequency tracking circuit | |
| CN102655431A (en) | High-sensitive multimode fiber receiving circuit | |
| CN112290916A (en) | Anti-electromagnetic interference wavelet analog signal conversion system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN NUOERHADUN ELECTRICAL APPLIANCE MANUFACTUR Free format text: FORMER OWNER: NUOER ELECTRIC CO., LTD., TIANJIN CITY Effective date: 20100825 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 300381 NO.20, HONGZE ROAD, DASI INDUSTRIAL PARK, XIQING ECONOMIC DEVELOPMENT ZONE, TIANJIN CITY TO: 300381 NO.20, HONGZE ROAD, DASI INDUSTRIAL PARK, XIQING ECONOMIC DEVELOPMENT ZONE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20100825 Address after: The 300381 Xiqing Economic Development Zone Industrial Park Ze Road No. 20 Hung Temple Applicant after: Tianjin Nole Electricity Co., Ltd. Address before: 300381 Tianjin City, Xiqing Economic Development Zone Industrial Park Ze Road No. 20 Hung Temple Applicant before: Nuoer Electric Co., Ltd., Tianjin City |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100505 |