CN203775160U - Transient earth voltage pulse generating circuit - Google Patents
Transient earth voltage pulse generating circuit Download PDFInfo
- Publication number
- CN203775160U CN203775160U CN201420134498.6U CN201420134498U CN203775160U CN 203775160 U CN203775160 U CN 203775160U CN 201420134498 U CN201420134498 U CN 201420134498U CN 203775160 U CN203775160 U CN 203775160U
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- effect transistor
- pulse generating
- capacitor
- generating circuit
- circuit
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Abstract
The utility model discloses a transient earth voltage pulse generating circuit. The circuit comprises a field effect transistor driving chip IC1, a field effect transistor Q1, an external voltage filter circuit, a pulse generating circuit and an impedance matching circuit. A square wave signal provided by an external circuit controls an output state of the field effect transistor driving chip IC1. The output state of the field effect transistor driving chip IC1 controls on and off of the field effect transistor Q1. The on and off of the field effect transistor Q1 control the pulse generating circuit. The external voltage filter circuit carries out filtering on a power supply signal and provides to the pulse generating circuit. An output signal of the pulse generating circuit is output to a ground voltage pulse signal output terminal via the impedance matching circuit. By using the transient ground voltage pulse generating circuit provided in the utility model, the structure is simple; needed components are less and cost is low; rising edge time of an acquired transient ground voltage pulse signal is short and can reach 8ns.
Description
Technical field
The utility model relates to a kind of transient state ground voltage pulse generating circuit, relates to TEV detecting instrument collimation technique.
Background technology
When transient state ground voltage (TEV) refers to high voltage electric equipment generation partial discharge, the instantaneous voltage to earth producing on its metal-back.Transient state ground voltage measuring technique is a kind of novel high voltage electric equipment generation partial discharge online measuring technique, carries out Partial Discharge Detection by detecting TEV signal.In the production of TEV detecting instrument and calibration, need to there is equipment to be used for the TEV signal that simulated high-pressure electric partial discharge produces TEV detecting instrument is calibrated.
The rising time of transient state ground voltage pulse signal is very short, generally in nanosecond, and the less time requirement that can meet TEV signal rising edge of existing pulse generating circuit, and general structure complexity, cost is high.Simulating in addition the transient state ground voltage pulse signal producing is for TEV detecting instrument is calibrated, and therefore needs the amplitude of ground voltage pulse that pulse generating circuit produces and cycle all adjustable.Existing ground voltage pulse generating circuit needs more component units, implementation complexity, and also cost compare is high, and the portability of product is poor
Utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of transient state ground voltage pulse generating circuit, and it is simple in structure, can solve needs in prior art that components and parts are many, cost is high, baroque problem.
Technical scheme: for achieving the above object, the technical solution adopted in the utility model is:
A kind of transient state ground voltage pulse generating circuit, comprise that field-effect transistor drives chip IC 1, field-effect transistor Q1, external voltage filter circuit, pulse generating circuit and impedance matching circuit, the square-wave signal controlling filed effect transistor that external circuit provides drives the output state of chip IC 1, field-effect transistor drives the break-make of the output state controlling filed effect transistor Q1 of chip IC 1, the break-make control impuls circuit for generating of field-effect transistor Q1, external voltage filter circuit carries out filtering to power supply signal, and offer pulse generating circuit, the output signal of pulse generating circuit exports ground voltage pulse signal output end to through impedance matching circuit.
A kind of physical circuit is: described external voltage filter circuit comprises inductance L 1 and capacitor C 3, and described pulse generating circuit comprises diode D1, resistance R 1, capacitor C 1 and capacitor C 2, and described impedance matching circuit comprises resistance R 2, resistance R 3 and diode D2, described field-effect transistor drives between the output of chip IC 1 and the control end of field-effect transistor Q1 and is connected with resistance R 4, field-effect transistor Q1 one end ground connection, the negative pole of another terminating diode of field-effect transistor Q1 D1, power supply signal is connected to the positive pole of diode D1 successively after the inductance L 1 of series connection and resistance R 1, between inductance L 1 and resistance R 1, connect one end of capacitor C 3, the other end ground connection of capacitor C 3, the positive pole of diode D1 successively through series connection capacitor C 1 and capacitor C 2 after as ground voltage pulse signal output end, parallel resistance R2 between ground voltage pulse signal output end and ground end, resistance R 3 and diode D2, the output signal of described ground voltage pulse signal output end and ground end is transient state ground voltage pulse signal.
External voltage filter circuit carries out filtering to the power supply signal of input, ensures that the power supply signal of input is stable without clutter, and the voltage that changes power supply signal can change the amplitude of the transient state ground voltage pulse signal of output.The square-wave signal that external circuit provides drives chip IC 1 to realize the break-make control to field-effect transistor Q1 by field-effect transistor: when field-effect transistor Q1 is when off-state becomes conducting state, capacitor C 1 and capacitor C 2 are charged; When field-effect transistor Q1 is when conducting state becomes off-state, capacitor C 1 and capacitor C 2 are discharged.In the charge and discharge process of capacitor C 1 and capacitor C 2, ground voltage pulse signal output end has output of pulse signal; The size of adjusting capacitor C 1, capacitor C 2 and resistance R 1 can change the rising time of transient state ground voltage pulse signal.
Beneficial effect: the transient state ground voltage pulse generating circuit that the utility model provides, simple in structure, required components and parts are few, cost is low, and the rising time of the transient state ground voltage pulse signal obtaining is short, can reach 8ns.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
A kind of transient state ground voltage pulse generating circuit, comprise that field-effect transistor drives chip IC 1, field-effect transistor Q1, external voltage filter circuit, pulse generating circuit and impedance matching circuit, the square-wave signal controlling filed effect transistor that external circuit provides drives the output state of chip IC 1, field-effect transistor drives the break-make of the output state controlling filed effect transistor Q1 of chip IC 1, the break-make control impuls circuit for generating of field-effect transistor Q1, external voltage filter circuit carries out filtering to power supply signal, and offer pulse generating circuit, the output signal of pulse generating circuit exports ground voltage pulse signal output end to through impedance matching circuit.
As shown in Figure 1, this circuit is specially: described external voltage filter circuit comprises inductance L 1 and capacitor C 3, described pulse generating circuit comprises diode D1, resistance R 1, capacitor C 1 and capacitor C 2, and described impedance matching circuit comprises resistance R 2, resistance R 3 and diode D2, square-wave signal (Square Wave) the access field-effect transistor that external circuit provides drives an input INB of chip IC 1, described field-effect transistor drives between the output OUTB of chip IC 1 and the control end (gate pole) of field-effect transistor Q1 and is connected with resistance R 4, field-effect transistor Q1 one end ground connection, the negative pole of another terminating diode of field-effect transistor Q1 D1, power supply signal (Power Source) is connected to the positive pole of diode D1 successively after the inductance L 1 of series connection and resistance R 1, between inductance L 1 and resistance R 1, connect one end of capacitor C 3, the other end ground connection of capacitor C 3, the positive pole of diode D1 successively through series connection capacitor C 1 and capacitor C 2 after as ground voltage pulse signal output end, parallel resistance R2 between ground voltage pulse signal output end and ground end, resistance R 3 and diode D2, the output signal of described ground voltage pulse signal output end and ground end is transient state ground voltage pulse signal (PLUSE OUT).
External voltage filter circuit carries out filtering to the power supply signal of input, ensures that the power supply signal of input is stable without clutter, and the voltage that changes power supply signal can change the amplitude of the transient state ground voltage pulse signal of output.The square-wave signal that external circuit provides drives chip IC 1 to realize the break-make control to field-effect transistor Q1 by field-effect transistor: when field-effect transistor Q1 is when off-state becomes conducting state, capacitor C 1 and capacitor C 2 are charged; When field-effect transistor Q1 is when conducting state becomes off-state, capacitor C 1 and capacitor C 2 are discharged.In the charge and discharge process of capacitor C 1 and capacitor C 2, ground voltage pulse signal output end has output of pulse signal; The size of adjusting capacitor C 1, capacitor C 2 and resistance R 1 can change the rising time of transient state ground voltage pulse signal.Field-effect transistor drives the break-make of chip IC 1 controlling filed effect transistor Q1, and field-effect transistor Q1, diode D1, capacitor C 1 and capacitor C 2 connect into a capacitor charge and discharge circuit; Resistance R 2, resistance R 3 are connected with capacitor C 1, capacitor C 2 with diode D2 parallel connection again, adjust the size that capacitor C 1, capacitor C 2, resistance R 1 and resistance R 2 are worth, and can change the time that discharges and recharges of electric capacity, realize the time of pulse trailing edge and adjust;
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (2)
1. a transient state ground voltage pulse generating circuit, it is characterized in that: comprise that field-effect transistor drives chip IC 1, field-effect transistor Q1, external voltage filter circuit, pulse generating circuit and impedance matching circuit, the square-wave signal controlling filed effect transistor that external circuit provides drives the output state of chip IC 1, field-effect transistor drives the break-make of the output state controlling filed effect transistor Q1 of chip IC 1, the break-make control impuls circuit for generating of field-effect transistor Q1, external voltage filter circuit carries out filtering to power supply signal, and offer pulse generating circuit, the output signal of pulse generating circuit exports ground voltage pulse signal output end to through impedance matching circuit.
2. transient state ground voltage pulse generating circuit according to claim 1, it is characterized in that: described external voltage filter circuit comprises inductance L 1 and capacitor C 3, described pulse generating circuit comprises diode D1, resistance R 1, capacitor C 1 and capacitor C 2, and described impedance matching circuit comprises resistance R 2, resistance R 3 and diode D2, described field-effect transistor drives between the output of chip IC 1 and the control end of field-effect transistor Q1 and is connected with resistance R 4, field-effect transistor Q1 one end ground connection, the negative pole of another terminating diode of field-effect transistor Q1 D1, power supply signal is connected to the positive pole of diode D1 successively after the inductance L 1 of series connection and resistance R 1, between inductance L 1 and resistance R 1, connect one end of capacitor C 3, the other end ground connection of capacitor C 3, the positive pole of diode D1 successively through series connection capacitor C 1 and capacitor C 2 after as ground voltage pulse signal output end, parallel resistance R2 between ground voltage pulse signal output end and ground end, resistance R 3 and diode D2, the output signal of described ground voltage pulse signal output end and ground end is transient state ground voltage pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134498.6U CN203775160U (en) | 2014-03-24 | 2014-03-24 | Transient earth voltage pulse generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134498.6U CN203775160U (en) | 2014-03-24 | 2014-03-24 | Transient earth voltage pulse generating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203775160U true CN203775160U (en) | 2014-08-13 |
Family
ID=51292305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420134498.6U Expired - Fee Related CN203775160U (en) | 2014-03-24 | 2014-03-24 | Transient earth voltage pulse generating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203775160U (en) |
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2014
- 2014-03-24 CN CN201420134498.6U patent/CN203775160U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Corning road in Jiangning District of Nanjing City, Jiangsu province 211100 Dongshan Street Industrial Zone No. 789 Patentee after: SANTAI ELECTRIC POWER TECHNOLOGY (NANJING) CO.,LTD. Address before: Corning road in Jiangning District of Nanjing City, Jiangsu province 211100 Dongshan Street Industrial Zone No. 789 Patentee before: SUNTECH ELECTRIC (NANJING) CO.,LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 |