CN106533389A - Multi-order filtering circuit - Google Patents
Multi-order filtering circuit Download PDFInfo
- Publication number
- CN106533389A CN106533389A CN201611170719.5A CN201611170719A CN106533389A CN 106533389 A CN106533389 A CN 106533389A CN 201611170719 A CN201611170719 A CN 201611170719A CN 106533389 A CN106533389 A CN 106533389A
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- electric capacity
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- passive
- filter circuit
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- 238000001914 filtration Methods 0.000 title claims abstract description 30
- 238000002955 isolation Methods 0.000 claims abstract description 13
- 230000003321 amplification Effects 0.000 claims abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
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- Amplifiers (AREA)
- Networks Using Active Elements (AREA)
Abstract
The invention discloses a multi-order filtering circuit. The multi-order filtering circuit comprises a passive second-order filtering circuit and an active voltage-controlled band-pass filtering circuit; the passive second-order filtering circuit comprises a passive RC filtering circuit and a RC alternating current isolation filtering circuit; the active voltage-controlled band-pass filtering circuit comprises a frequency and frequency band selection network and a filtering signal amplification circuit; the multi-order filtering circuit further comprises a voltage follower*2D; and input signals pass through the passive RC filtering circuit, the RC alternating current isolation filtering circuit, the frequency and frequency band selection network, the filtering signal amplification circuit and the voltage follower*2D in sequence. Compared with the prior art, the multi-order filtering circuit can remove interference caused by different frequency band signals in time and can suppress noise interference outside the frequency band efficiently.
Description
Technical field
The present invention relates to data signal processing technology field, specifically a kind of multistage filter circuit.
Background technology
Data collecting system is the process for collecting, recognize and choose data from data source, in Based Intelligent Control, data acquisition
System directly influences whole system as the indispensable part of TT＆C system, the performance characteristics of data acquisition.
In ready-made application, being affected by factors such as external voltage fluctuation, power supply clutter, load changes for feeder ear affects
Sampling precision.Therefore the performance of wave filter is put forward higher requirement.
The content of the invention
For overcoming the shortcomings of that above-mentioned prior art is present, it is an object of the invention to provide one kind can eliminate collection letter in time
Number interference multistage filter circuit.
The technical solution adopted for the present invention to solve the technical problems is：A kind of multistage filter circuit, is characterized in that：Including
Passive second-order filter circuit and active voltage-controlled bandwidth-limited circuit, the passive second-order filter circuit include passive RC filter circuits
Isolation filter circuit is exchanged with RC, and the active voltage-controlled bandwidth-limited circuit includes that frequency band selects network and filtering signal to put
Big circuit, the multistage filter circuit also include voltage follower * 2D, and input signal sequentially passes through passive RC filter circuits, RC
Exchange isolation filter circuit, frequency band select network, filtering signal amplifying circuit and voltage follower * 2D.
Preferably, the voltage follower * 2D are LM324.
Preferably, the passive RC filter circuits include that resistance R60 and electric capacity C53, RC exchange isolation filter circuit include
Electric capacity C50 and resistance R61, the frequency band select network to include resistance R55, R63 and electric capacity C51, C54, the filtering letter
Number amplifying circuit includes amplifier U19A and resistance R54, R57, and filtering signal amplifying circuit also includes input filter capacitor C55,
Output filter capacitor C52 and power filtering capacitor C49.
Preferably, the amplifier U19A is LM6172.
Preferably, one end of electric capacity C54, C51 and resistance R55 is connect, the other end of electric capacity R51 connects resistance R63, electricity respectively
The other end for holding one end of C55 and 3 pins of amplifier U19A, electric capacity C54, C55 and resistance R63 is grounded, amplifier U19A
2 pins connect one end of resistance R57 and R53 respectively, the other end ground connection of R57, the pin of amplifier U19A connect electricity respectively
13 pins of the other end of resistance R55, R53, one end of electric capacity C52 and voltage follower * 2D, the other end ground connection of electric capacity C52, put
4 pins of big device U19A connect -5V voltages, and 8 pins connect+5V voltages, and the two ends of electric capacity C49 connect 8 pins and ground of U19A, electricity respectively
The 12/14 pin connection of pressure follower * 2D output signal.
The invention has the beneficial effects as follows：Compared with prior art, passive second-order filter circuit of the invention and active voltage-controlled
Bandwidth-limited circuit, timely can be filtered for the interference that different frequency bands signal brings, making an uproar outside effective rejection band
Sound interference；Amplifier strengthens to filtered signal, and signal isolation is exported by voltage follower, while intensifier circuit load energy
Power.
Description of the drawings
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the circuit diagram of the present invention.
Specific embodiment
For can clearly illustrate the technical characterstic of this programme, below by specific embodiment, and its accompanying drawing is combined, to this
It is bright to be described in detail.
As depicted in figs. 1 and 2, a kind of multistage filter circuit of the invention, including passive second-order filter circuit and active pressure
Control bandwidth-limited circuit, the passive second-order filter circuit include that passive RC filter circuits exchange isolation filter circuit, institute with RC
Stating active voltage-controlled bandwidth-limited circuit includes that frequency band selects network and filtering signal amplifying circuit, the multistage filter circuit
Also include voltage follower * 2D, input signal sequentially passes through passive RC filter circuits, RC exchange isolation filter circuits, frequency frequency
Band selects network, filtering signal amplifying circuit and voltage follower * 2D.The voltage follower * 2D are LM324.
Preferably, the passive RC filter circuits include resistance R60 and electric capacity C53, eliminate common mode disturbances, RC exchange isolation
Filter circuit includes electric capacity C50 and resistance R61.The frequency band select network include resistance R55, R63 and electric capacity C51,
C54, by changing the parameter of resistance R55, R63 and electric capacity C52, C54, adjustable center frequency.The filtering signal amplifies electricity
Road includes amplifier U19A and resistance R54, R57, and filtered signal is strengthened, also including input filter capacitor C55, output
Filter capacitor C52 and power filtering capacitor C49, is further filtered to signal, eliminates interference, and the signal after amplification is through electricity
Pressure follower * 2D isolation and amplifiers, while enhance circuit load.
Preferably, the amplifier U19A is LM6172.The resistance value of resistance R53, R55, R57, R60, R61 and R63 point
Not Wei 68K Ω, 10K Ω, 20K Ω, 1K Ω, 10K Ω and 10K Ω, the capacitance of electric capacity C49, C50, C52～C55 is 0.1 μ
F, electric capacity C51 are 470PF.
Preferably, input signal is accessed in one end of the resistance R60, and the other end connects the one of electric capacity C53 and C50 respectively
End, the other end ground connection of electric capacity C53, other end connection resistance R61 one end of electric capacity C50, the other end of resistance R61 connect respectively
One end of electric capacity C54, C51 and resistance R55, the other end of electric capacity R51 connect resistance R63, one end of electric capacity C55 and amplification respectively
The other end of 3 pins of device U19A, electric capacity C54, C55 and resistance R63 is grounded, and 2 pins of amplifier U19A connect electricity respectively
One end of resistance R57 and R53, the other end ground connection of R57, the pin of amplifier U19A connect the other end of resistance R55, R53 respectively,
One end of electric capacity C52 and 13 pins of voltage follower * 2D, the other end ground connection of electric capacity C52,4 pins of amplifier U19A connect-
5V voltages, 8 pins connect+5V voltages, and the two ends of electric capacity C49 connect 8 pins and ground of U19A respectively, and 12, the 14 of voltage follower * 2D
Pin connection output signal.
The above is the preferred embodiment of the present invention, for those skilled in the art,
Without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also regarded as this
Bright protection domain.
Claims (5)
1. a kind of multistage filter circuit, is characterized in that：Including passive second-order filter circuit and active voltage-controlled bandwidth-limited circuit, institute
Stating passive second-order filter circuit includes that passive RC filter circuits exchange isolation filter circuit, the active voltage-controlled bandpass filtering with RC
Circuit includes that frequency band selects network and filtering signal amplifying circuit, the multistage filter circuit also to include voltage follower *
2D, input signal sequentially pass through passive RC filter circuits, RC exchange isolation filter circuits, frequency band and select network, filtering letter
Number amplifying circuit and voltage follower * 2D.
2. a kind of multistage filter circuit according to claim 1, is characterized in that：The voltage follower * 2D are LM324.
3. a kind of multistage filter circuit according to claim 2, is characterized in that：The passive RC filter circuits include resistance
R60 and electric capacity C53, RC exchange isolation filter circuit include electric capacity C50 and resistance R61, and the frequency band selects network to include
Resistance R55, R63 and electric capacity C51, C54, the filtering signal amplifying circuit include amplifier U19A and resistance R54, R57, filtering
Signal amplification circuit also includes input filter capacitor C55, output filter capacitor C52 and power filtering capacitor C49.
4. a kind of multistage filter circuit according to claim 3, is characterized in that：The amplifier U19A is LM6172.
5. a kind of multistage filter circuit according to claim 4, is characterized in that：Access input in one end of the resistance R60
Signal, the other end connect one end of electric capacity C53 and C50, the other end ground connection of electric capacity C53, the other end connection of electric capacity C50 respectively
Resistance R61 one end, the other end of resistance R61 connect one end of electric capacity C54, C51 and resistance R55, the other end of electric capacity R51 respectively
Connect the other end of 3 pins of resistance R63, one end of electric capacity C55 and amplifier U19A, electric capacity C54, C55 and resistance R63 respectively
It is grounded, 2 pins of amplifier U19A connect one end of resistance R57 and R53, the other end ground connection of R57, amplifier U19A respectively
Pin connect 13 pins of the other end of resistance R55, R53, one end of electric capacity C52 and voltage follower * 2D, electric capacity respectively
The other end ground connection of C52,4 pins of amplifier U19A connect -5V voltages, and 8 pins connect+5V voltages, and the two ends of electric capacity C49 connect respectively
8 pins and ground of U19A, the 12/14 pin connection of voltage follower * 2D output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170719.5A CN106533389A (en) | 2016-12-16 | 2016-12-16 | Multi-order filtering circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170719.5A CN106533389A (en) | 2016-12-16 | 2016-12-16 | Multi-order filtering circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106533389A true CN106533389A (en) | 2017-03-22 |
Family
ID=58340332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611170719.5A Withdrawn CN106533389A (en) | 2016-12-16 | 2016-12-16 | Multi-order filtering circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106533389A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167714A (en) * | 2017-06-13 | 2017-09-15 | 珠海市脉迅科技有限公司 | A kind of low current synchronous signal sensor device |
| CN110086447A (en) * | 2019-03-18 | 2019-08-02 | 哈尔滨工程大学 | A kind of speed signal conditioning circuit of classification filtering |
-
2016
- 2016-12-16 CN CN201611170719.5A patent/CN106533389A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167714A (en) * | 2017-06-13 | 2017-09-15 | 珠海市脉迅科技有限公司 | A kind of low current synchronous signal sensor device |
| CN110086447A (en) * | 2019-03-18 | 2019-08-02 | 哈尔滨工程大学 | A kind of speed signal conditioning circuit of classification filtering |
| CN110086447B (en) * | 2019-03-18 | 2023-09-29 | 哈尔滨工程大学 | Graded filtering rotational speed signal conditioning circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170309 Address after: 250021 Ji'nan, Central District, Shandong City Road, the southern part of the shop No. 18 Applicant after: Shandong Jinzhou Kerui Energy Technology Co. Ltd. Address before: 250021 Shandong, Ji'nan, Central District, No. seven Shanxi Road, No. 42 Applicant before: Dou Shengtang |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170322 |