CN106921364A - The filter of mobile data acquisition device - Google Patents
The filter of mobile data acquisition device Download PDFInfo
- Publication number
- CN106921364A CN106921364A CN201710140038.2A CN201710140038A CN106921364A CN 106921364 A CN106921364 A CN 106921364A CN 201710140038 A CN201710140038 A CN 201710140038A CN 106921364 A CN106921364 A CN 106921364A
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- Prior art keywords
- operational amplifier
- resistance
- electric capacity
- resistor
- filter
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/38—One-way transmission networks, i.e. unilines
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Abstract
The invention discloses the filter of mobile data acquisition device, including the first filter circuit, first filter circuit includes the first operational amplifier, first resistor R1, second resistance R2, the first electric capacity C1, the second electric capacity C2, the 4th electric capacity C4, first resistor R1 connects with second resistance R2, first resistor R1 is signal input part with the other end of second resistance R2 connection ends, and second resistance R2 is connected with the other end of first resistor R1 connection ends with the inverting input of the first operational amplifier；Second electric capacity C2 one end is connected on the circuit that first resistor R1 is connected with second resistance R2, and its other end is connected with the output end of the first operational amplifier.Electric capacity is connected with the line of power supply of the present invention and the first operational amplifier, makes wave filter without overshoot, the recovery time is short, and it is reasonable higher than each frequency decay of data rate；Not only amplitude-frequency characteristic is steady in passband, and the intermediate zone with appropriate length, does not easily cause distortion.
Description
Technical field
The present invention relates to the wave filter of harvester, and in particular to the filter of mobile data acquisition device.
Background technology
Wave filter, as the term suggests, it is the device filtered to ripple." ripple " is a physical concept widely,
Electronic technology field, the value that " ripple " is narrowly confined to refer in particular to describe various physical quantitys with time fluctuations process.
By the effect of various kinds of sensors, the function of time of voltage or electric current is converted into, the time waveform of referred to as various physical quantitys,
Or referred to as signal.The signal of mobile terminal data harvester it generation, conversion, transmission each link can
Can be distorted due to the presence of environment and interference, even in quite a number of cases, this distortion is also very serious, so that letter
Number and its entrained information be disturbed.Existing wave filter has stable amplitude-frequency characteristic in passband, but has mistake more long
Band is crossed, distortion is easily caused in intermediate zone；Wave filter intermediate zone is very narrow, but the amplitude versus frequency characte of inside is very unstable.
The content of the invention
The technical problems to be solved by the invention are the deficiencies of existing wave filter, it is therefore intended that provide mobile data collection dress
The filter put, solves each irrational problem of frequency decay.
The present invention is achieved through the following technical solutions：
The filter of mobile data acquisition device, including the first filter circuit, first filter circuit include first
Operational amplifier, first resistor, second resistance, the first electric capacity, the second electric capacity, the 4th electric capacity, the first resistor and the second electricity
Resistance series connection, the first resistor is signal input part, the second resistance and the first electricity with the other end of second resistance connection end
The other end for hindering connection end is connected with the inverting input of the first operational amplifier；Described second electric capacity one end is connected to the first electricity
On the circuit that resistance is connected with second resistance, its other end is connected with the output end of the first operational amplifier；First electric capacity one
End is connected on the circuit that second resistance is connected with the inverting input of the first operational amplifier, its other end ground connection；Described
The positive input of one operational amplifier is connected with the output end of the first operational amplifier；The negative electricity of first operational amplifier
Source termination power, described 4th electric capacity one end is connected to the negative power end of the first operational amplifier, its other end ground connection；Described
The output end of one operational amplifier is the output end of the first filter circuit.
Further, the filter of mobile data acquisition device, also including the second filter circuit, second filtered electrical
Road includes the second operational amplifier, 3rd resistor, the 4th resistance, the 7th electric capacity, the 5th electric capacity, the 6th electric capacity, the 3rd electricity
Resistance and the 4th resistant series, the 3rd resistor connect with the other end of the 4th resistance connection end and the output end of the first filter circuit
Connect, the 4th resistance is connected with the other end of 3rd resistor connection end with the inverting input of the second operational amplifier；It is described
5th electric capacity one end is connected on the circuit that 3rd resistor is connected with the 4th resistance, and its other end is defeated with the second operational amplifier
Go out end connection；Described 7th electric capacity one end is connected to the circuit that the 4th resistance is connected with the inverting input of the second operational amplifier
On, its other end ground connection；The positive input of second operational amplifier is connected with the output end of the second operational amplifier；Institute
The negative supply termination power of the second operational amplifier is stated, described 6th electric capacity one end is connected to the negative supply of the second operational amplifier
End, its other end ground connection；The output end of second operational amplifier is the output end of the second filter circuit.
Further, the first operational amplifier and the second operational amplifier use OPA333, its high accuracy, Micro Energy Lose and
Small volume.
Further, the output end of second filter circuit as whole wave filter output end.
The present invention compared with prior art, has the following advantages and advantages：Power supply of the present invention is put with the first computing
Electric capacity is connected with the line of big device, makes wave filter without overshoot, the recovery time is short, and closed higher than each frequency decay of data rate
Reason；Not only amplitude-frequency characteristic is steady in passband, and the intermediate zone with appropriate length, does not easily cause distortion.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention.
Mark and corresponding parts title in accompanying drawing：
R1- first resistors, R2- second resistances, R3- 3rd resistors, the resistance of R4- the 4th, the electric capacity of C1- first, the electricity of C2- second
Hold, the electric capacity of C4- the 4th, the electric capacity of C5- the 5th, the electric capacity of C6- the 6th, the electric capacity of C7- the 7th.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment
As shown in figure 1, the filter of mobile data acquisition device, including the first filter circuit, first filtered electrical
Road includes the first operational amplifier, first resistor R1, second resistance R2, the first electric capacity C1, the second electric capacity C2, the 4th electric capacity C4,
The first resistor R1 connects with second resistance R2, and the first resistor R1 is signal with the other end of second resistance R2 connection ends
Input, the second resistance R2 connects with the other end of first resistor R1 connection ends and the inverting input of the first operational amplifier
Connect；Described second electric capacity C2 one end is connected on the circuit that first resistor R1 is connected with second resistance R2, its other end and first
The output end connection of operational amplifier；It is anti-with the first operational amplifier that described first electric capacity C1 one end is connected to second resistance R2
On the circuit of phase input connection, its other end ground connection；The positive input of first operational amplifier is put with the first computing
The output end connection of big device；The negative supply termination power of first operational amplifier, described 4th electric capacity C4 one end is connected to
The negative power end of the first operational amplifier, its other end ground connection；The output end of first operational amplifier is the first filtered electrical
The output end on road.
The filter of mobile data acquisition device, also including the second filter circuit, second filter circuit includes the
Two operational amplifiers, 3rd resistor R3, the 4th resistance R4, the 7th electric capacity C7, the 5th electric capacity C5, the 6th electric capacity C6, the described 3rd
Resistance R3 connects with the 4th resistance R4, the other end and the first filter circuit of the 3rd resistor R3 and the 4th resistance R4 connection ends
Output end connection, the other end of the 4th resistance R4 and 3rd resistor R3 connection ends is anti-phase defeated with the second operational amplifier
Enter end connection；Described 5th electric capacity C5 one end is connected on the circuit that 3rd resistor R3 is connected with the 4th resistance R4, its other end
Output end with the second operational amplifier is connected；Described 7th electric capacity C7 one end is connected to the 4th resistance R4 and the second operation amplifier
On the circuit of the inverting input connection of device, its other end ground connection；The positive input and second of second operational amplifier
The output end connection of operational amplifier；The negative supply termination power of second operational amplifier, described 6th electric capacity C6 one end
The negative power end of the second operational amplifier is connected to, its other end ground connection；The output end of second operational amplifier is second
The output end of filter circuit.The output end of second filter circuit as whole wave filter output end.
First operational amplifier and the second operational amplifier use OPA333, and closely power supply is electric for its output amplitude
Pressure, its low-power consumption, the drift shift amplifier of small size, the positive power source terminal ground connection of OPA333, the purpose is to allow with phase and anti-phase two
The impedance that individual input is seen away is equal, so as to the pressure drop that the bias current of " predetermined " two inputs " equal " is produced at them
Also it is equal, play a part of to cancel out each other, the output end of the second filter circuit is the output end as whole wave filter.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (4)
1. the filter of mobile data acquisition device, it is characterised in that including the first filter circuit, first filter circuit
Including the first operational amplifier, first resistor (R1), second resistance (R2), the first electric capacity (C1), the second electric capacity (C2), the 4th electricity
Hold (C4), the first resistor (R1) is connected with second resistance (R2), and the first resistor (R1) is connected with second resistance (R2)
The other end at end is signal input part, the other end of the second resistance (R2) with first resistor (R1) connection end and the first computing
The inverting input connection of amplifier；Described second electric capacity (C2) one end is connected to first resistor (R1) with second resistance (R2) even
On the circuit for connecing, its other end is connected with the output end of the first operational amplifier；Described first electric capacity (C1) one end is connected to
On the circuit that two resistance (R2) are connected with the inverting input of the first operational amplifier, its other end ground connection；First computing
The positive input of amplifier is connected with the output end of the first operational amplifier；The negative supply termination of first operational amplifier
Power supply, described 4th electric capacity (C4) one end is connected to the negative power end of the first operational amplifier, its other end ground connection；Described first
The output end of operational amplifier is the output end of the first filter circuit.
2. the filter of mobile data acquisition device according to claim 1, it is characterised in that also including the second filtering
Circuit, second filter circuit includes the second operational amplifier, 3rd resistor (R3), the 4th resistance (R4), the 7th electric capacity
(C7), the 5th electric capacity (C5), the 6th electric capacity (C6), the 3rd resistor (R3) are connected with the 4th resistance (R4), the 3rd electricity
Resistance (R3) is connected with the other end of the 4th resistance (R4) connection end with the output end of the first filter circuit, the 4th resistance (R4)
The other end with 3rd resistor (R3) connection end is connected with the inverting input of the second operational amplifier；5th electric capacity (C5)
One end is connected on the circuit that 3rd resistor (R3) is connected with the 4th resistance (R4), and its other end is defeated with the second operational amplifier
Go out end connection；Described 7th electric capacity (C7) one end is connected to the 4th resistance (R4) and connects with the inverting input of the second operational amplifier
On the circuit for connecing, its other end ground connection；The output of the positive input and the second operational amplifier of second operational amplifier
End connection；The negative supply termination power of second operational amplifier, described 6th electric capacity (C6) one end is connected to the second computing
The negative power end of amplifier, its other end ground connection；The output end of second operational amplifier is the output of the second filter circuit
End.
3. the filter of mobile data acquisition device according to claim 1, it is characterised in that first computing is put
Big device and the second operational amplifier use OPA333.
4. the filter of mobile data acquisition device according to claim 2, it is characterised in that second filtered electrical
The output end on road as whole wave filter output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140038.2A CN106921364A (en) | 2017-03-10 | 2017-03-10 | The filter of mobile data acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140038.2A CN106921364A (en) | 2017-03-10 | 2017-03-10 | The filter of mobile data acquisition device |
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| Publication Number | Publication Date |
|---|---|
| CN106921364A true CN106921364A (en) | 2017-07-04 |
Family
ID=59460420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710140038.2A Pending CN106921364A (en) | 2017-03-10 | 2017-03-10 | The filter of mobile data acquisition device |
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| Country | Link |
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| CN (1) | CN106921364A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542778A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | Current analysis alarm device for CVT secondary voltage testing device |
| CN110542784A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT secondary side remote monitoring device |
| CN110542878A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT voltage live monitoring device with charging function |
| CN110542781A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | Current test analysis diagnosis device for CVT secondary voltage test device |
| CN110542873A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT secondary voltage analysis device based on electronic transmitter |
| CN110542785A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | remote real-time monitoring device for secondary side of CVT (continuously variable transmission) |
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| CN101425152A (en) * | 2008-12-12 | 2009-05-06 | 湖南大学 | Design method for FIR filter based on learning rate changing neural net |
| CN201878104U (en) * | 2010-12-13 | 2011-06-22 | 周艳 | Filter |
| CN203563026U (en) * | 2013-11-14 | 2014-04-23 | 四川省迪特尔电子有限公司 | Low-pass buffer filter circuit |
| CN104639094A (en) * | 2015-01-20 | 2015-05-20 | 国家电网公司 | Filtering circuit |
| CN105049070A (en) * | 2015-07-27 | 2015-11-11 | 北京理工大学 | Uplink near-field communication receiver for implantable medical instrument |
| CN206506503U (en) * | 2017-03-10 | 2017-09-19 | 成都金广通科技有限公司 | The wave filter of mobile terminal data harvester |
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2017
- 2017-03-10 CN CN201710140038.2A patent/CN106921364A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425152A (en) * | 2008-12-12 | 2009-05-06 | 湖南大学 | Design method for FIR filter based on learning rate changing neural net |
| CN201878104U (en) * | 2010-12-13 | 2011-06-22 | 周艳 | Filter |
| CN203563026U (en) * | 2013-11-14 | 2014-04-23 | 四川省迪特尔电子有限公司 | Low-pass buffer filter circuit |
| CN104639094A (en) * | 2015-01-20 | 2015-05-20 | 国家电网公司 | Filtering circuit |
| CN105049070A (en) * | 2015-07-27 | 2015-11-11 | 北京理工大学 | Uplink near-field communication receiver for implantable medical instrument |
| CN206506503U (en) * | 2017-03-10 | 2017-09-19 | 成都金广通科技有限公司 | The wave filter of mobile terminal data harvester |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542778A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | Current analysis alarm device for CVT secondary voltage testing device |
| CN110542784A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT secondary side remote monitoring device |
| CN110542878A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT voltage live monitoring device with charging function |
| CN110542781A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | Current test analysis diagnosis device for CVT secondary voltage test device |
| CN110542873A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT secondary voltage analysis device based on electronic transmitter |
| CN110542785A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | remote real-time monitoring device for secondary side of CVT (continuously variable transmission) |
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Application publication date: 20170704 |