CN103618520B - High pressure fast-rising pulse generator and pulse generation and method - Google Patents
High pressure fast-rising pulse generator and pulse generation and method Download PDFInfo
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- CN103618520B CN103618520B CN201310642058.1A CN201310642058A CN103618520B CN 103618520 B CN103618520 B CN 103618520B CN 201310642058 A CN201310642058 A CN 201310642058A CN 103618520 B CN103618520 B CN 103618520B
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Abstract
The invention provides a kind of high pressure fast-rising pulse generator and pulse generation, including control unit, high voltage power supply and pulse shaping loop, control circuit controls high voltage power supply provides running voltage to pulse shaping loop, it is characterized in that: pulse shaping loop includes high-voltage capacitance, current-limiting resistance is sequentially connected in series time delay cable that characteristic impedance is R1, switch and load after be serially connected in the two ends of high-voltage capacitance, load or connect load in being or for external load, its coupling impedance is R2, R2=R1, the impedance of current-limiting resistance is far longer than the characteristic impedance R1 of time delay cable.Another technical scheme of the present invention there is provided a kind of rectangular pulse method for generation using above-mentioned pulse generator.Rectangle wave energy produced by the present invention realizes the detection to probe performance, in order to provide a preferable signal source to probe, attenuator or other detection instruments, can be analyzed the technical parameter of probe and performance.
Description
Technical field
The present invention relates to a kind of forward position quickly (picosecond), voltage higher (4kv), the squarer of energy continuous trigger and method, belong to electronic technology, electromagnetic compatibility technology.
Background technology
Probe, attenuator are widely used in electronic technology and electromagnetic compatibility technology, are the electronic units connecting circuit-under-test with oscillograph input, and therefore whether accurate the and probe of measured signal has great relation；Probe is often affected by the probe bandwidth of self, frequency and attenuation quotient, and distortion or inaccurate waveform have significant effect researching and analysing waveform, even bringing the biggest loss, therefore bandwidth is suitable, the accurate probe of conversion is very important.
When measuring circuit-under-test, we often ignore the probe impact on actual waveform.But in actual applications, especially in high-frequency circuit, inappropriate probe often makes output waveform be distorted；In EMC, standard has strict requirements to the forward position pulsewidth of output waveform especially, and therefore suitable probe and oscillograph accurately are even more important.
Summary of the invention
The technical problem to be solved in the present invention provides a preferable signal source to probe, attenuator or other detection instruments.
In order to solve above-mentioned technical problem, the technical scheme is that and provide a kind of high pressure fast-rising pulse generator and pulse generation, including control unit, high voltage power supply and pulse shaping loop, control circuit controls high voltage power supply provides running voltage to pulse shaping loop, it is characterized in that: pulse shaping loop includes high-voltage capacitance, current-limiting resistance is sequentially connected in series the time delay cable that characteristic impedance is R1, the two ends of high-voltage capacitance it are serially connected in after switch and load, load or connect load in being or for external load, its coupling impedance is R2, R2=R1, the impedance of current-limiting resistance is far longer than the characteristic impedance R1 of time delay cable.
Preferably, Switching Power Supply running voltage is provided for described high voltage power supply and described control circuit.
Preferably, described control unit includes single-chip microcomputer, and single-chip microcomputer connects liquid crystal display, key operation unit, relay action unit and DA respectively to cell, wherein:
Relay action unit includes optical coupling isolation circuit and Darlington transistor circuit, and each road of single-chip microcomputer controls the output pin optical coupling isolation circuit by concatenation and the Darlington transistor circuit rear drive actuating of relay；
The serial signal outfan of single-chip microcomputer connects DA and produces certain analog voltage amount to high voltage power supply to the outfan of cell via operation amplifier unit to cell, DA.
nullAnother technical scheme of the present invention there is provided a kind of rectangular pulse method for generation using above-mentioned pulse generator，It is characterized in that，Step is: controlled high voltage power supply to high-voltage capacitor charging by control circuit，After charging，The output high pressure of high voltage power supply after current-limiting resistance on the time delay cable that characteristic impedance is R1，Therefore on the distribution capacity of time delay cable, also form the high pressure that value is U0，When the switch is closed，Owing to the coupling impedance of load is identical with the characteristic impedance of time delay cable，Therefore in the moment of switch Guan Bi，Obtain in load be amplitude be the high pressure of 1/2U0，Owing to the adhesive of switch causes the impedance in loop to be undergone mutation，Remainder amplitude is that the high pressure of 1/2U0 to reflect to high voltage power supply direction through time delay cable，When reflexing to current-limiting resistance，The characteristic impedance being far longer than due to the impedance of this current-limiting resistance，The second time causing waveform reflects，Substantially open-circuit reflection，The waveform of reflection is anti-phase，And reflect to load direction with the amplitude of-1/2U0，When arriving load，Just offset with the high pressure phase that original amplitude is 1/2U0，Then defining an amplitude in load is the high pressure of 1/2U0，Width is that electromagnetic wave uploads a rectangle arteries and veins of the time passing 2 times at time delay cable.
Rectangle wave energy produced by the present invention realizes the detection to probe performance, in order to provide a preferable signal source to probe, attenuator or other detection instruments, can be analyzed the technical parameter of probe and performance.
Accompanying drawing explanation
The circuit block diagram of a kind of high pressure fast-rising pulse generator and pulse generation that Fig. 1 provides for the present invention；
Fig. 2 is relay action unit circuit diagram；
Fig. 3 is that DA gives element circuit figure；
Fig. 4 is pulse shaping loop circuit figure.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
As shown in Figure 1, a kind of high pressure fast-rising pulse generator and pulse generation that the present invention provides, including control unit, high voltage power supply and pulse shaping loop, control circuit controls high voltage power supply provides running voltage to pulse shaping loop, Switching Power Supply provide running voltage for described high voltage power supply and described control circuit.The most each main circuit part is further spread out description:
Control circuit:
The control circuit of the present invention is that control unit major control liquid crystal display, key operation unit, relay action unit and DA are to parts such as cell as core and peripheral circuit with the control unit of single-chip microcomputer SM89516A composition.
Liquid crystal display is the instruction and data information different according to single-chip microcomputer, produces development liquid crystal driving signal, controls the display function of liquid crystal panel in liquid crystal display.Liquid crystal display uses T6963C driving chip and the liquid crystal panel of 240 × 128 dot matrix.
As shown in Figure 2, in relay action unit, single-chip microcomputer SM89516A, through 8255 ECP Extended Capabilities Ports, is then passed through optical coupling isolation circuit, the impulsive disturbance preventing relay adhesive from disconnecting and to bring, eventually passes the Darlington transistor in chip ULN2003 and amplifies rear drive relay.
As shown in Figure 3, at DA in cell, single-chip microcomputer SM89516A is to mono-12 Bits Serial signal of chip MAX531, then the output of chip MAX531 is after being formed operation amplifier unit by operational amplifier and associated components, certain analog voltage amount is produced again to high voltage power supply, for controlling the High voltage output of high voltage power supply after a voltage follower circuit being made up of operational amplifier.
Pulse shaping circuit:
Pulse shaping circuit be then by Cable delay formed square wave last or directly output be followed by 50 ohm attenuator or in connect the load of 50 ohm after export.The second situation is applicable to the attenuator of general probe or high input impedance.Its physical circuit is as shown in Figure 4, including high-voltage capacitance C, current-limiting resistance R is serially connected in the two ends of high-voltage capacitance C after being sequentially connected in series time delay cable 1, switch K and the load that characteristic impedance is R1, load or connect load in being or for external load, its coupling impedance is R2, R2=R1=50 ohm, the impedance of current-limiting resistance R is the characteristic impedance R1 that 200K ohm is far longer than time delay cable 1.In the present embodiment, switch K selects mercoid switch.
nullControlled high voltage power supply by control circuit to charge to high-voltage capacitance C，After charging，The output high pressure of high voltage power supply after current-limiting resistance R on the time delay cable 1 that characteristic impedance is R1，Therefore on the distribution capacity of time delay cable 1, also form the high pressure that value is U0，When switching K Guan Bi，Owing to the coupling impedance of load is identical with the characteristic impedance of time delay cable 1，Therefore in the moment of switch K Guan Bi，Obtain in load be amplitude be the high pressure of 1/2U0，Owing to the adhesive of switch K causes the impedance in loop to be undergone mutation，Remainder amplitude is that the high pressure of 1/2U0 to reflect to high voltage power supply direction through time delay cable 1，When reflexing to current-limiting resistance R，The characteristic impedance being far longer than due to the impedance of this current-limiting resistance R，The second time causing waveform reflects，Substantially open-circuit reflection，The waveform of reflection is anti-phase，And reflect to load direction with the amplitude of-1/2U0，When arriving load，Just offset with the high pressure phase that original amplitude is 1/2U0，Then defining an amplitude in load is the high pressure of 1/2U0，Width is that electromagnetic wave uploads a rectangle arteries and veins of the time passing 2 times at time delay cable.
Although present invention discloses as above with preferred embodiments, any those skilled in the art, without departing from spirit and scope of the present utility model, when making a little amendment and perfect, therefore protection scope of the present invention is when with being as the criterion that claims are defined.
Claims (1)
- null1. the rectangular pulse method for generation using pulse generator，This pulse generator includes control unit、High voltage power supply and pulse shaping loop，Control circuit controls high voltage power supply provides running voltage to pulse shaping loop，Pulse shaping loop includes high-voltage capacitance (C)，Current-limiting resistance (R) is sequentially connected in series time delay cable (1) that characteristic impedance is R1、The two ends of high-voltage capacitance (C) it are serially connected in after switch (K) and load，Load or connect load in being or for external load，Its coupling impedance is R2，R2=R1，The impedance of current-limiting resistance (R) is more than the characteristic impedance R1 of time delay cable (1)，It is characterized in that，Step is: is controlled high voltage power supply by control circuit and charges to high-voltage capacitance (C)，After charging，The output high pressure of high voltage power supply after current-limiting resistance (R) in time delay cable (1) that characteristic impedance is R1，Therefore on the distribution capacity of time delay cable (1), also form the high pressure that value is U0，When switching (K) Guan Bi，The coupling impedance of load is identical with the characteristic impedance of time delay cable (1)，In the moment that switch (K) closes，Obtain in load be amplitude be the high pressure of 1/2U0，The adhesive of switch (K) causes the impedance in loop to be undergone mutation，Remainder amplitude is that the high pressure of 1/2U0 to reflect to high voltage power supply direction through time delay cable (1)，When reflexing to current-limiting resistance (R)，The impedance of this current-limiting resistance (R) is more than characteristic impedance，The second time causing waveform reflects，It it is open-circuit reflection，The waveform of reflection is anti-phase，And reflect to load direction with the amplitude of-1/2U0，When arriving load，Just offset with the high pressure phase that original amplitude is 1/2U0，Defining an amplitude in load is the high pressure of 1/2U0，Width is that electromagnetic wave uploads a rectangle arteries and veins of the time passing 2 times at time delay cable；Described control unit includes single-chip microcomputer, single-chip microcomputer connects liquid crystal display, key operation unit, relay action unit and DA respectively to cell, wherein: relay action unit includes optical coupling isolation circuit and Darlington transistor circuit, each road of single-chip microcomputer controls the output pin optical coupling isolation circuit by concatenation and the Darlington transistor circuit rear drive actuating of relay；The serial signal outfan of single-chip microcomputer connects DA and produces certain analog voltage amount to high voltage power supply to the outfan of cell via operation amplifier unit to cell, DA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310642058.1A CN103618520B (en) | 2013-12-03 | 2013-12-03 | High pressure fast-rising pulse generator and pulse generation and method |
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| CN201310642058.1A CN103618520B (en) | 2013-12-03 | 2013-12-03 | High pressure fast-rising pulse generator and pulse generation and method |
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| CN103618520A CN103618520A (en) | 2014-03-05 |
| CN103618520B true CN103618520B (en) | 2016-09-21 |
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| CN106093734A (en) * | 2016-08-02 | 2016-11-09 | 上海三基电子工业有限公司 | Partial discharge pulse based on GIS signal detection generator and method thereof |
| CN107797085A (en) * | 2016-08-31 | 2018-03-13 | 北京普源精电科技有限公司 | Soon along signal control circuit and its Active Front End, test system |
| CN111416543B (en) * | 2020-03-13 | 2021-11-19 | 华中科技大学 | Square wave pulse power supply for positioning cable intermediate joint |
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| US7240248B2 (en) * | 2003-11-10 | 2007-07-03 | Dell Products L.P. | Apparatus and method for reducing false triggering of a signal due to an electrostatic discharge event |
| CN201984091U (en) * | 2011-01-12 | 2011-09-21 | 上海三基电子工业有限公司 | High-frequency noise simulator |
| CN201985826U (en) * | 2011-01-12 | 2011-09-21 | 上海三基电子工业有限公司 | Intelligent grouped pulse generator |
| CN102608369A (en) * | 2012-04-09 | 2012-07-25 | 上海三基电子工业有限公司 | Touch-control and intelligent type pulse train and lightning stroke surge generator |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7240248B2 (en) * | 2003-11-10 | 2007-07-03 | Dell Products L.P. | Apparatus and method for reducing false triggering of a signal due to an electrostatic discharge event |
| CN201984091U (en) * | 2011-01-12 | 2011-09-21 | 上海三基电子工业有限公司 | High-frequency noise simulator |
| CN201985826U (en) * | 2011-01-12 | 2011-09-21 | 上海三基电子工业有限公司 | Intelligent grouped pulse generator |
| CN102608369A (en) * | 2012-04-09 | 2012-07-25 | 上海三基电子工业有限公司 | Touch-control and intelligent type pulse train and lightning stroke surge generator |
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