CN206506503U - The wave filter of mobile terminal data harvester - Google Patents
The wave filter of mobile terminal data harvester Download PDFInfo
- Publication number
- CN206506503U CN206506503U CN201720229049.3U CN201720229049U CN206506503U CN 206506503 U CN206506503 U CN 206506503U CN 201720229049 U CN201720229049 U CN 201720229049U CN 206506503 U CN206506503 U CN 206506503U
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- Prior art keywords
- operational amplifier
- resistance
- electric capacity
- resistor
- circuit
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Abstract
The utility model discloses the wave filter of mobile terminal data harvester, 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, the other end of first resistor R1 and second resistance R2 connection ends is signal input part, 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 the utility model power supply 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 utility model is related to the wave filter of harvester, and in particular to the wave filter of mobile terminal data harvester.
Background technology
Wave filter, is the device filtered to ripple as its name suggests." 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 can in its generation, conversion, each link transmitted
It 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 longer mistake
Band is crossed, distortion is easily caused in intermediate zone；Wave filter intermediate zone is very narrow, but internal amplitude versus frequency characte is very unstable.
Utility model content
Technical problem to be solved in the utility model is the deficiency of existing wave filter, it is therefore intended that provide mobile terminal number
According to the wave filter of harvester, each irrational problem of frequency decay is solved.
The utility model is achieved through the following technical solutions：
The wave filter of mobile terminal data harvester, including the first filter circuit, first filter circuit include the
One operational amplifier, first resistor, second resistance, the first electric capacity, the second electric capacity, the 4th electric capacity, the first resistor and second
The other end of resistant series, the first resistor and second resistance connection end is signal input part, the second resistance and first
The other end of resistance connection end is connected with the inverting input of the first operational amplifier；Described second electric capacity one end is connected to first
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；It is described
The positive input of first operational amplifier is connected with the output end of the first operational amplifier；First operational amplifier it is negative
Power supply 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；It is described
The output end of first operational amplifier is the output end of the first filter circuit.
Further, the wave filter of mobile terminal data harvester, in addition to the second filter circuit, second filtering
Circuit includes the second operational amplifier, 3rd resistor, the 4th resistance, the 7th electric capacity, the 5th electric capacity, the 6th electric capacity, the described 3rd
Resistance and the 4th resistant series, the 3rd resistor and the other end and the output end of the first filter circuit of the 4th resistance connection end
Connection, the 4th resistance is connected with the other end of 3rd resistor connection end with the inverting input of the second operational amplifier；Institute
The 5th electric capacity one end is stated to be connected on the circuit that 3rd resistor is connected with the 4th resistance, its other end and the second operational amplifier
Output end is connected；Described 7th electric capacity one end is connected to the line that the 4th resistance is connected with the inverting input of the second operational amplifier
Lu Shang, its other end ground connection；The positive input of second operational amplifier is connected with the output end of the second operational amplifier；
The negative supply termination power of second operational amplifier, described 6th electric capacity one end is connected to the negative electricity of the second operational amplifier
Source, 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 utility model compared with prior art, has the following advantages and advantages：The utility model power supply and
Electric capacity is connected with the line of one operational amplifier, makes wave filter without overshoot, the recovery time is short, and higher than each frequency of data rate
Rate decay is reasonable；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 utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the utility model structural representation.
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.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as limiting of the present utility model.
Embodiment
As shown in figure 1, the wave filter of mobile terminal data harvester, including the first filter circuit, first filtering
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, the first resistor R1 connects with second resistance R2, and the other end of the first resistor R1 and second resistance R2 connection ends is
Signal input part, the second resistance R2 and the other end and the anti-phase input of the first operational amplifier of first resistor R1 connection ends
End connection；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 with
The output end connection of first operational amplifier；Described first electric capacity C1 one end is connected to second resistance R2 and the first operational amplifier
Inverting input connection circuit on, its other end ground connection；The positive input of first operational amplifier and the first fortune
Calculate the output end connection of amplifier；The negative supply termination power of first operational amplifier, described 4th electric capacity C4 one end connects
The negative power end of the first operational amplifier is connected on, its other end ground connection；The output end of first operational amplifier is the first filter
The output end of wave circuit.
The wave filter of mobile terminal data harvester, in addition to the second filter circuit, second filter circuit include
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, described
Three resistance R3 connect with the 4th resistance R4, the other end and the first filtered electrical of the 3rd resistor R3 and the 4th resistance R4 connection ends
The output end connection on road, the other end of the 4th resistance R4 and 3rd resistor R3 connection ends is anti-phase with the second operational amplifier
Input is connected；Described 5th electric capacity C5 one end is connected on the circuit that 3rd resistor R3 is connected with the 4th resistance R4, and its is another
End is connected with the output end of the second operational amplifier；Described 7th electric capacity C7 one end is connected to the 4th resistance R4 and put with the second computing
On the circuit of the inverting input connection of big device, its other end ground connection；The positive input of second operational amplifier and
The output end connection of two operational amplifiers；The negative supply termination power of second operational amplifier, the 6th electric capacity C6 mono-
End is connected to the negative power end of the second operational amplifier, its other end ground connection；The output end of second operational amplifier is the
The output end of two filter circuits.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, OPA333 positive power source terminal ground connection, the purpose is to allow with phase and anti-phase two
The impedance that individual input is seen away is equal, the pressure drop produced so as to the bias current of " predetermined " two inputs " equal " at them
Also it is equal, play a part of cancelling out each other, the output end of the second filter circuit is the output end as whole wave filter.
Above-described embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, be should be understood that and be the foregoing is only embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, is equally replaced
Change, improve, should be included within protection domain of the present utility model.
Claims (4)
1. the wave filter of mobile terminal data harvester, it is characterised in that 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) is connected with second resistance (R2), and the first resistor (R1) connects with second resistance (R2)
The other end for connecing end is signal input part, the second resistance (R2) and the other end of first resistor (R1) connection end and the first fortune
Calculate the inverting input connection of amplifier；Described second electric capacity (C2) one end is connected to first resistor (R1) and second resistance (R2)
On the circuit of connection, 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 second resistance (R2) is connected with the inverting input of the first operational amplifier, its other end ground connection；First fortune
The positive input for calculating amplifier is connected with the output end of the first operational amplifier；The negative power end of first operational amplifier
Power supply is connect, 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
The output end of one operational amplifier is the output end of the first filter circuit.
2. the wave filter of mobile terminal data harvester according to claim 1, it is characterised in that also including the second filter
Wave 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)
It is connected with the other end of 3rd resistor (R3) connection end 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；The inverting input that described 7th electric capacity (C7) one end is connected to the 4th resistance (R4) and the second operational amplifier connects
On the circuit connect, 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 wave filter of mobile terminal data harvester according to claim 1, it is characterised in that first computing
Amplifier and the second operational amplifier use OPA333.
4. the wave filter of mobile terminal data harvester according to claim 2, it is characterised in that second filtering
The output end of circuit as whole wave filter output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720229049.3U CN206506503U (en) | 2017-03-10 | 2017-03-10 | The wave filter of mobile terminal data harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720229049.3U CN206506503U (en) | 2017-03-10 | 2017-03-10 | The wave filter of mobile terminal data harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206506503U true CN206506503U (en) | 2017-09-19 |
Family
ID=59832826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720229049.3U Expired - Fee Related CN206506503U (en) | 2017-03-10 | 2017-03-10 | The wave filter of mobile terminal data harvester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206506503U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921364A (en) * | 2017-03-10 | 2017-07-04 | 成都金广通科技有限公司 | The filter of mobile data acquisition device |
-
2017
- 2017-03-10 CN CN201720229049.3U patent/CN206506503U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921364A (en) * | 2017-03-10 | 2017-07-04 | 成都金广通科技有限公司 | The filter of mobile data acquisition device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170919 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |