CN207301151U - A kind of capacitive divider - Google Patents
A kind of capacitive divider Download PDFInfo
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- CN207301151U CN207301151U CN201721387937.4U CN201721387937U CN207301151U CN 207301151 U CN207301151 U CN 207301151U CN 201721387937 U CN201721387937 U CN 201721387937U CN 207301151 U CN207301151 U CN 207301151U
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- amplifier
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- voltage follower
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Abstract
This application discloses a kind of capacitive divider, including bleeder circuit, voltage follower, signal amplification circuit and filter circuit；The bleeder circuit includes power supply, the first capacitance and the second capacitance；Part between the in-phase input end of the voltage follower and first capacitance and the second capacitance is connected；The reverse input end of the voltage follower is connected with the output terminal of the voltage follower；The signal amplification circuit includes the first amplifier, first resistor, second resistance, 3rd resistor and the first swept resistance；The filter circuit includes the 4th resistance, the 5th resistance, the 3rd capacitance, the 4th capacitance, the second amplifier and the second swept resistance.The application have the advantages that it is simple in structure, cheap, cost-effective, due to it is simple in structure be not in damage of jolting, and be easy to transport.
Description
Technical field
This application involves electric device maintenance field, more particularly to a kind of capacitive divider.
Background technology
Divider for high voltage pulse measurement mainly has two kinds of structures of resistance-type and condenser type.Resitstance voltage divider is due to dividing
There are parasitic parameter, it measures frequency band and to be subject to increase limits the resistive element of pressure arm, during pulse front edge speed to be measured, response
Characteristic cannot meet measurement request, while there are certain shadow to examining system circuit for the limited input impedance of resitstance voltage divider
Ring.
At present, for the faster pulse of front rate, the general measurement method for using capacitive divider.But condenser type point
Depressor is complicated, damage of easily jolting, and is not easy to transport.Cost relative resistance formula divider is higher.
Utility model content
To solve the above-mentioned problems, this application provides a kind of capacitive divider, including bleeder circuit, voltage follower,
Signal amplification circuit and filter circuit；
The bleeder circuit includes power supply, the first capacitance and the second capacitance；
The power supply, the first capacitance and the second capacitance are sequentially connected in series；
Part between the in-phase input end of the voltage follower and first capacitance and the second capacitance is connected；
The reverse input end of the voltage follower is connected with the output terminal of the voltage follower；
The signal amplification circuit includes the first amplifier, first resistor, second resistance, 3rd resistor and first and slides electricity
Resistance；
The output terminal of the voltage follower is connected with one end of the first resistor；
The other end of the first resistor is connected with the in-phase input end of first amplifier；
The inverting input of first amplifier is grounded by the second resistance；
The reverse input end of first amplifier is also connected by 3rd resistor with the output terminal of first amplifier；
The power end of first amplifier is connected with working power；
The power end of first amplifier is also connected by the first swept resistance with working power；
The filter circuit includes the 4th resistance, the 5th resistance, the 3rd capacitance, the 4th capacitance, the second amplifier and second
Swept resistance；
The output terminal of first amplifier is same mutually defeated by the 4th resistance and the 5th resistance and second amplifier
Enter end connection；
Part connection between one end of 3rd capacitance and the 4th resistance and the 5th resistance；
The other end of 3rd capacitance is connected with the output terminal of second amplifier；
The in-phase input end of second amplifier also passes through the 4th capacity earth；
The power end of second amplifier is connected with working power VCC；
The power end of second amplifier is also connected by the second swept resistance with working power.
Further, the capacitive divider further includes oscillograph, the input terminal of the oscillograph and second capacitance
It is connected in parallel；
Output terminal of the input terminal of the oscillograph also with second amplifier is connected.
Further, the capacitive divider includes frequency-characteristic measuring-testing instrument, and the frequency-characteristic measuring-testing instrument shows with described
Ripple device connects；
The frequency-characteristic measuring-testing instrument is also in parallel with the second resistance.
From above technical scheme, the application provides a kind of capacitive divider, has simple in structure, cheap, property
Valency than it is high the advantages of, due to it is simple in structure be not in damage of jolting, and be easy to transport.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of circuit diagram for capacitive divider that the application provides.
Embodiment
Referring to Fig. 1, this application provides a kind of capacitive divider, including bleeder circuit, voltage follower, signal amplification electricity
Road and filter circuit；
The bleeder circuit includes power supply V1, the first capacitance C1 and the second capacitance C2；
The power supply V1, the first capacitance C1 and the second capacitance C2 are sequentially connected in series；
Part phase between the in-phase input end of the voltage follower U1 and the first capacitance C1 and the second capacitance C2
Connection；
The reverse input end of the voltage follower U1 is connected with the output terminal of the voltage follower U1；
The signal amplification circuit includes the first amplifier U2, first resistor R1, second resistance R2,3rd resistor R3 and the
One swept resistance R6；
The output terminal of the voltage follower U1 is connected with one end of the first resistor R1；
The other end of the first resistor R1 is connected with the in-phase input end of the first amplifier U2；
The inverting input of the first amplifier U2 is grounded by the second resistance R2；
The reverse input end of the first amplifier U2 also passes through the output of 3rd resistor R3 and the first amplifier U2
End connection；
The power end of the first amplifier U2 is connected with working power VCC；
The power end of the first amplifier U2 is also connected by the first swept resistance R6 with working power VCC；
The filter circuit includes the 4th resistance R4, the 5th resistance R5, the 3rd capacitance C3, the 4th capacitance C4, the second amplification
Device U2 and the second swept resistance R7；
The output terminal of the first amplifier U2 passes through the 4th resistance R4 and the 5th resistance R5 and the second amplifier U3
In-phase input end connection；
Part connection between one end of the 3rd capacitance C3 and the 4th resistance R4 and the 5th resistance R5；
The other end of the 3rd capacitance C3 is connected with the output terminal of the second amplifier U3；
The in-phase input end of the second amplifier U3 is also grounded by the 4th capacitance C4；
The power end of the second amplifier U3 is connected with working power VCC；
The power end of the second amplifier U3 is also connected by the second swept resistance R7 with working power VCC.
The operation principle of the present embodiment is：Supply voltage V1 is 110kV AC power frequency voltages, using the of 1pF and 100nF
One capacitance C1 and the second capacitance C2 capacitance partial pressure circuits in series, by its partial pressure propertiesIt can obtain, divider
The voltage peak-to-peak value of output is 3.11V, virtual value 1.1V.Voltage follower U1 plays signal isolation and raising in circuit
The effect of input impedance.Afterwards, signal is amplified suitable amplitude by voltage through amplifying circuit, then signal is filtered
Processing.
From above technical scheme, the application provides a kind of capacitive divider, has simple in structure, cheap, property
Valency than it is high the advantages of, due to it is simple in structure be not in damage of jolting, and be easy to transport.
Further, the capacitive divider further includes oscillograph, the input terminal of the oscillograph and second capacitance
C2 is connected in parallel；
Output terminal of the input terminal of the oscillograph also with the second amplifier U3 is connected.
Further, the capacitive divider includes frequency-characteristic measuring-testing instrument, and the frequency-characteristic measuring-testing instrument shows with described
Ripple device connects；
The frequency-characteristic measuring-testing instrument is also in parallel with the second resistance R2.
Output waveform and frequency characteristic of the above-described embodiment by oscillograph and frequency-characteristic measuring-testing instrument to capacitive divider
It is monitored, staff can be facilitated to be monitored the working status of capacitive divider.
From above technical scheme, the application provides a kind of capacitive divider, has simple in structure, cheap, property
Valency than it is high the advantages of, due to it is simple in structure be not in damage of jolting, and be easy to transport.
Claims (3)
1. a kind of capacitive divider, it is characterised in that including bleeder circuit, voltage follower, signal amplification circuit and filtered electrical
Road；
The bleeder circuit includes power supply, the first capacitance and the second capacitance；
The power supply, the first capacitance and the second capacitance are sequentially connected in series；
Part between the in-phase input end of the voltage follower and first capacitance and the second capacitance is connected；
The reverse input end of the voltage follower is connected with the output terminal of the voltage follower；
The signal amplification circuit includes the first amplifier, first resistor, second resistance, 3rd resistor and the first swept resistance；
The output terminal of the voltage follower is connected with one end of the first resistor；
The other end of the first resistor is connected with the in-phase input end of first amplifier；
The inverting input of first amplifier is grounded by the second resistance；
The reverse input end of first amplifier is also connected by 3rd resistor with the output terminal of the first amplifier U2；
The power end of first amplifier is connected with working power；
The power end of first amplifier is also connected by the first swept resistance with working power；
The filter circuit includes the 4th resistance, the 5th resistance, the 3rd capacitance, the 4th capacitance, the second amplifier and second and slides
Resistance；
The output terminal of first amplifier passes through the 4th resistance and the in-phase input end of the 5th resistance and second amplifier
Connection；
Part connection between one end of 3rd capacitance and the 4th resistance and the 5th resistance；
The other end of 3rd capacitance is connected with the output terminal of second amplifier；
The in-phase input end of second amplifier also passes through the 4th capacity earth；
The power end of second amplifier is connected with working power；
The power end of second amplifier is also connected by the second swept resistance with working power.
2. capacitive divider as claimed in claim 1, it is characterised in that the capacitive divider further includes oscillograph, described
The input terminal of oscillograph is connected in parallel with second capacitance；
Output terminal of the input terminal of the oscillograph also with second amplifier is connected.
3. capacitive divider as claimed in claim 2, it is characterised in that the capacitive divider includes frequency characteristic test
Instrument, the frequency-characteristic measuring-testing instrument are connected with the oscillograph；
The frequency-characteristic measuring-testing instrument is also in parallel with the second resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387937.4U CN207301151U (en) | 2017-10-25 | 2017-10-25 | A kind of capacitive divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387937.4U CN207301151U (en) | 2017-10-25 | 2017-10-25 | A kind of capacitive divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207301151U true CN207301151U (en) | 2018-05-01 |
Family
ID=62273999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721387937.4U Active CN207301151U (en) | 2017-10-25 | 2017-10-25 | A kind of capacitive divider |
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| Country | Link |
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| CN (1) | CN207301151U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611906A (en) * | 2020-12-31 | 2021-04-06 | 大连民族大学 | Portable handheld oscilloscope |
| CN113890148A (en) * | 2021-09-30 | 2022-01-04 | 中天宽带技术有限公司 | Battery short-circuit protection circuit and battery charging and discharging circuit |
-
2017
- 2017-10-25 CN CN201721387937.4U patent/CN207301151U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611906A (en) * | 2020-12-31 | 2021-04-06 | 大连民族大学 | Portable handheld oscilloscope |
| CN113890148A (en) * | 2021-09-30 | 2022-01-04 | 中天宽带技术有限公司 | Battery short-circuit protection circuit and battery charging and discharging circuit |
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