CN101101308A - Microstrip transmission line high speed sample taker - Google Patents
Microstrip transmission line high speed sample taker Download PDFInfo
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- CN101101308A CN101101308A CNA2007100494302A CN200710049430A CN101101308A CN 101101308 A CN101101308 A CN 101101308A CN A2007100494302 A CNA2007100494302 A CN A2007100494302A CN 200710049430 A CN200710049430 A CN 200710049430A CN 101101308 A CN101101308 A CN 101101308A
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Abstract
The invention discloses a microstrip line high speed sampler for measuring high speed pulse signal waveform, comprising: signal transmission line, strobe transmission line, sampling circuit, and power supply circuit, where the sampling circuit comprises: sampling gate, sample hold capacitor, sampled signal hold circuit, multichannel scan circuit and output amplifier circuit; the tested pulse waveform is connected with the sampling gate via tap of the signal transmission line and connected with the sample hold capacitor via the sampling gate, and then connected in turn with the sampled signal hold circuit and the multichannel scan circuit and finally connected with the output amplifier circuit and outputs the sampled waveform; strobe pulse is connected with the sampling gate via the strobe transmission line and the power supply circuit is connected with the sampling gate, sampled signal hold circuit, multichannel scan circuit and output amplifier circuit. And the invention has features of good sampling effect, high sampling speed, small volume, low manufacturing cost, able to measuring single and repeated high speed pulse waveforms, applied to multichannel large-scale engineering test.
Description
Technical field
The invention belongs to the device field that shows electric variable or waveform, be specifically related to a kind of microstrip transmission line high speed sample taker that is used to measure the high-speed pulse signal waveform, it can be used for high-speed figure oscillograph and transient state digital sample system.
Background technology
At present, the method that shows the high-speed pulse waveform generally adopts sampling oscilloscope and high-speed sampler etc.The sampling oscilloscope method is the speed of the trace of waveform with nanosecond or psec, inswept display screen, very fast then disappearance; When human eye is watched waveform traces, need multiple scanning that waveform traces is manifested with stable visible brightness usually, therefore require the input signal that repeats.High-speed sampler can real time record pulse transient process, so as thereafter with slowly many speed, promptly in " equivalent time ", read and observe waveform and need not repeat input signal.
Existing high-speed sampler mainly contains two kinds of versions on the market, and is a kind of based on the cathode ray tube (CRT) technology, another kind of analog-digital converter (ADC) based on continuous operation.The CRT high-speed sampler, adopt the twin-cathode ray beam passage, an electron beam real time execution, and waveform traces write display screen, a charge-storage diode array is arranged in this display screen, diode array is caught the electric charge under " writing " electron beam deposition, " reads " electron beam thereafter and with slower equivalent time speed electric charge is read.The CRT high-speed sampler costs an arm and a leg, and volume is excessive, and has limited analog bandwidth.The ADC high-speed sampler, adopt the analog to digital converter of operation continuously that signal is taken a sample, and at a terrific speed sample signal is converted to binary number, deposit number storage in real time in, but it must carry out complicated real-time operation, being about to conversion of signals is binary data, and before the sampling result is deposited in the large-scale data-carrier store next time, has limited sample rate.
Summary of the invention
The deficiency that prior art high speed sampler costs an arm and a leg, volume is excessive in order to overcome, sample rate is slow, be unwell to the test of multichannel through engineering approaches the invention provides a kind of microstrip transmission line high speed sample taker.
Microstrip transmission line high speed sample taker of the present invention comprises: a signal transmssion line that is used to transmit measured pulse, two gating transmission lines that are used to transmit positive and negative strobe pulse are along the sample circuit and the power circuit of signal transmssion line tap setting.Sample circuit comprises, the sampling gate that is used for the measured pulse waveform sampling, the first order sample that is used for the sample signal quick storage keeps capacitor, the sample signal holding circuit that is used for sample signal maintenance and buffer deceleration, be used for sample signal being used to amplify the output amplifier of sample waveform by the multiplex circuit that sampling calls over.Its annexation is, the measured pulse waveform is connected with sampling gate by the tap of signal transmssion line, sampling gate keeps capacitor to be connected with first order sample, and then be connected successively with sample signal holding circuit, multiplex circuit and output amplifier, at last by output amplifier output sample waveform; Positive and negative strobe pulse is connected to sampling gate by positive and negative gating transmission line respectively, and power circuit is connected with output amplifier with sampling gate, sample signal holding circuit, multiplex circuit respectively.
Described signal transmssion line is a U type band tap compensation pit microstrip transmission line, adopts curve form to connect a plurality of sampling gates.
Described gating transmission line is the microstrip transmission line that the transmission line width successively decreases with the strobe loads end, and linearly is distributed between a plurality of sampling gates.
Described sampling gate is made of the high speed Schottky switching diode of four high conformities, and a plurality of sampling gates constitute the sampling gate array.
Described first order sample keep capacitor to adopt directly being produced on the pcb substrate, have good consistance and the appearance value is the triangle capacitor of pF magnitude.
Described sample signal holding circuit is the secondary sample signal holding circuit that radio frequency field effect transistor and high frequency field effect transistor constitute.
Described being used for is made of by the multiplex circuit that sampling calls over sample signal synchronous binary counter and multiway analog switch.
Microstrip transmission line high speed sample taker of the present invention, adopt the U type and compensate the signal transmssion line of pit and the gating transmission line of stepping characteristic impedance with tap, employing is based on the symmetric sampling gate of four schottky diodes, the triangle first order sample that directly is produced on the pcb substrate keeps capacitor, the sample signal holding circuit that radio frequency field effect transistor and high frequency field effect transistor constitute, the multiplex circuit that synchronous counter and multiway analog switch constitute.
Microstrip transmission line high speed sample taker sampling of the present invention is effective, and sample rate is fast, and volume is little, and cost is low, can measure the high-speed pulse waveform of single and repetition, is applicable to the test of multichannel large-scale engineering.
Description of drawings
Fig. 1 is a microstrip transmission line high speed sample taker structured flowchart of the present invention
Fig. 2 is the local object construction figure of microstrip transmission line high speed sample taker of the present invention
Fig. 3 is the signal transmssion line structural representation of microstrip transmission line high speed sample taker of the present invention
Fig. 4 is the gating transmission line structure synoptic diagram of microstrip transmission line high speed sample taker of the present invention
Fig. 5 is the sampling door circuit schematic diagram of microstrip transmission line high speed sample taker of the present invention
Fig. 6 is the sample signal holding circuit schematic diagram of microstrip transmission line high speed sample taker of the present invention
Fig. 7 is the multiplex circuit schematic diagram of microstrip transmission line high speed sample taker of the present invention
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is a microstrip transmission line high speed sample taker structured flowchart of the present invention.Among Fig. 1, measured pulse 101 postpones through signal transmssion line and is connected to the sampling gate array, and strobe pulse 102 is connected to the sampling gate array by the gating transmission line, is taken out sample signal and be stored in first order sample by the sampling gate array to keep on the capacitor C1.It is the pF magnitude that sample keeps capacitor C1, to guarantee the demand of high-speed sampling, sample signal keeps and buffer deceleration through the sample signal holding circuit, being stored in second level sample keeps on the capacitor C2, C2 is a μ F magnitude, carry out order by multiplex circuit then and read, and provide final output sample waveform 103 by output amplifier.Therefore export sample waveform 103 interval greater than measured pulse 101 several magnitude, promptly in equivalent time, reappeared measured pulse than measured pulse 101 slow several magnitude, this has just been avoided taking expensive broad band amplifier and high-speed ADC, and the low speed Sampling techniques of the standard of employing are exported the sample waveform data and read and handle.
Among Fig. 1, power circuit is connected respectively to sampling gate, sample signal holding circuit, multiplex circuit and output amplifier, power circuit is input as ± the 12V DC voltage, pass through respectively+5V ,+3V ,-the 5V three terminal integrated voltage stabilizer, output+5V ,+3V ,-three groups of burning voltages of 5V.Output amplifier is to be the adjustable gain amplifying circuit of core composition with instrument operational amplifier A D622.
Fig. 2 is the local object construction figure of microstrip transmission line high speed sample taker of the present invention, has shown the structure of three sampling gates.Sampler of the present invention has 12 sampling gates, sample interval 100ps, and each sampling gate has identical structure.Among Fig. 2, signal transmssion line 104 is cranky between 3 sampling gates, four schottky diode symmetric sampling gates 106 are made of four the good high speed Schottky of consistance switching diodes, the pit 105 of signal transmssion line 104 taps place is used to compensate the capacitive load that sampling capacitor device C1 is loaded into signal transmssion line, so the sample waveform on the signal transmssion line can distortion.Positive and negative strobe pulse is loaded into sampling gate 106 by gating resistor R 1 and R2 respectively, the sample output waveform of sampling gate 106 is stored in first order sample and keeps on the capacitor C1, capacitor C1 is for directly being produced on the triangle sampling capacitor device on the pcb substrate, can keep good consistance, what capacitor appearance value can be done simultaneously is very little, and is connected to the sample signal holding circuit by line segment 107.
Fig. 3 is the signal transmssion line structural representation of microstrip transmission line high speed sample taker of the present invention.Signal transmssion line 104 is used to transmit measured pulse, is a U type microstrip transmission line, and the terminal of signal transmssion line 104 meets build-out resistor R
L, have the little band tap compensation of local coupling pit 105 in each sampling tap place, be used to compensate the transmission line waveform distortion that tap place first order sample keeps capacitor C1 to cause.
Fig. 4 is the gating transmission line structure synoptic diagram of microstrip transmission line high speed sample taker of the present invention.The gating transmission line is made of two microstrip transmission lines, positive gating transmission line 110 is used to transmit positive strobe pulse, negative gating transmission line 111 is used to transmit negative strobe pulse, and positive and negative strobe pulse is loaded into sampling gate 106 by positive loading end 108 and negative loading end 109 respectively.Gating transmission line between two loading ends has the characteristic impedance of stepping (increasing progressively), and promptly the transmission line width successively decreases, and is used for impedance matching, thereby guarantees the amplitude unanimity along each loading end strobe pulse of gating transmission line.
Fig. 5 is the sampling door circuit schematic diagram of microstrip transmission line high speed sample taker of the present invention.Measured pulse transmits on signal transmssion line 104, and pulsewidth is that the positive and negative strobe pulse of 100ps transmits on gating transmission line separately respectively.High speed Schottky switching diode D1, D2, D3, D4 constitute four schottky diode symmetric sampling gates 106.112 of sampling gate 106 terminates to the sampling tap pit 105 of signal transmssion line 104,114 ends are received positive strobe pulse loading end 108 by the logical resistor R1 of key player on a team, 115 ends are connected to negative strobe pulse loading end 109 by negative gating resistor R 2,113 ends are connected to first order sample and keep capacitor C1, and the storage sample signal.Under the peacetime state, diode D1, D2, D3, D4 all are in the disconnected state in anti-Pianguan County, when positive and negative strobe pulse arrives positive and negative strobe loads end 108 and 109 respectively, four diodes are opened simultaneously and are in conducting state, sample signal takes out from tap pit 105, and is stored on the first order sample maintenance capacitor C1.
Fig. 6 is the sample signal holding circuit schematic diagram of microstrip transmission line high speed sample taker of the present invention, and the sample signal holding circuit has the secondary sample signal and keeps and the buffer deceleration function.Input signal 116 is that first order sample keeps the sample signal on the capacitor C1, and output signal 117 is sent to the order that multiplex circuit carries out sample signal and reads, and drive signal 118 is used to control the opening and closing of field effect transistor J2.Input signal 116 at first is connected to radio frequency GaAs field effect transistor J1 by a resistor network, and promptly input signal 116 links to each other with resistor R 3, and resistor R 3 links to each other with resistor R 4 and ground connection, and is connected to the grid of field effect transistor J1 by resistor R 5.The drain electrode of field effect transistor J1 meets positive supply V by resistor R 6
D1(+3V), source electrode meets negative supply V by resistor R 7
S(-5V), source electrode is exported the source electrode that is connected to high frequency field effect transistor J2 by capacitor C3 simultaneously, and the source electrode of field effect transistor J2 is by resistor R 8 ground connection.Drive signal 118 is connected to the grid of field effect transistor J2 by resistor R 9, and the drain electrode of field effect transistor J2 is connected to second level sample and keeps on the capacitor C2.Generally speaking, second level sample keeps capacitor C2 to keep capacitor C1 big four more than the order of magnitude than first order sample, so sample signal speed four orders of magnitude that just can slow down, thereby has reached the function of front end quick sample signal damping deceleration.
Fig. 7 is the multiplex circuit schematic diagram of microstrip transmission line high speed sample taker of the present invention.Multiplex circuit is made up of synchronous binary counter U1 and multiway analog switch U2, the reset terminal of counter U1 (7 pin) ground connection, and Enable Pin (2 pin) is connected to power supply V
D2(+5V) read the clock control end (1 pin) that gating pulse CK is connected to U1.The Enable Pin of multiway analog switch U2 (18 pin) is connected to power supply V
D2, 17～14 pin of address wire A0-A3 are connected respectively to 3～6 pin of the output Q0-Q3 of counter U1.Begin scale-of-two increment when counting when reading gating pulse CK flip-flop number U1, the output of multiway analog switch U2 (28 pin) exports the 1st, 2 by the certain hour intervening sequences ... 12 sample waveforms.
Claims (7)
1. microstrip transmission line high speed sample taker is characterized in that: described sampler contains a signal transmssion line that is used to transmit measured pulse, two gating transmission lines that are used to transmit positive and negative strobe pulse, along the sample circuit and the power circuit of signal transmssion line tap setting; The first order sample that sample circuit comprises the sampling gate that is used for the measured pulse waveform sampling, be used for the sample signal quick storage keeps capacitor, be used for that sample signal keeps and the sample signal holding circuit of buffer deceleration, be used for multiplex circuit that sample signal is called over by sampling and the output amplifier that is used to amplify the sample waveform; Its annexation is, the measured pulse waveform is connected with sampling gate by the tap of signal transmssion line, sampling gate keeps capacitor to be connected with first order sample, and then be connected successively with sample signal holding circuit, multiplex circuit and output amplifier, at last by output amplifier output sample waveform; Positive and negative strobe pulse is connected to sampling gate by positive and negative gating transmission line respectively; Power circuit is connected with output amplifier with sampling gate, sample signal holding circuit, multiplex circuit respectively.
2. microstrip transmission line high speed sample taker according to claim 1 is characterized in that: described signal transmssion line is a U type band tap compensation pit microstrip transmission line, adopts curve form to connect a plurality of sampling gates.
3. microstrip transmission line high speed sample taker according to claim 1 is characterized in that: described gating transmission line is the microstrip transmission line that the transmission line width successively decreases with the strobe loads end, and linearly is distributed between a plurality of sampling gates.
4. microstrip transmission line high speed sample taker according to claim 1 is characterized in that: described sampling gate is made of four high speed Schottky switching diodes.
5. microstrip transmission line high speed sample taker according to claim 1 is characterized in that: described first order sample keep capacitor to adopt directly being produced on the pcb substrate, the appearance value is the triangle capacitor of pF magnitude.
6. microstrip transmission line high speed sample taker according to claim 1 is characterized in that: described sample signal holding circuit is the secondary sample signal holding circuit that radio frequency field effect transistor and high frequency field effect transistor constitute.
7. microstrip transmission line high speed sample taker according to claim 1 is characterized in that: described being used for is made of by the multiplex circuit that sampling calls over sample signal synchronous binary counter and multiway analog switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100494302A CN101101308A (en) | 2007-06-28 | 2007-06-28 | Microstrip transmission line high speed sample taker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100494302A CN101101308A (en) | 2007-06-28 | 2007-06-28 | Microstrip transmission line high speed sample taker |
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| CN101101308A true CN101101308A (en) | 2008-01-09 |
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| CNA2007100494302A Pending CN101101308A (en) | 2007-06-28 | 2007-06-28 | Microstrip transmission line high speed sample taker |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065652A (en) * | 2017-03-09 | 2017-08-18 | 伊玛精密电子（苏州）有限公司 | Multi-path synchronous is inputted and correspondence output control system and speed monitor |
| CN107196637A (en) * | 2017-04-25 | 2017-09-22 | 西安电子科技大学 | High sampling rate Wide band track holding circuit |
| CN112462255A (en) * | 2019-09-06 | 2021-03-09 | 深圳市睿德龙智能电气有限公司 | Device for monitoring electric equipment |
-
2007
- 2007-06-28 CN CNA2007100494302A patent/CN101101308A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065652A (en) * | 2017-03-09 | 2017-08-18 | 伊玛精密电子（苏州）有限公司 | Multi-path synchronous is inputted and correspondence output control system and speed monitor |
| CN107196637A (en) * | 2017-04-25 | 2017-09-22 | 西安电子科技大学 | High sampling rate Wide band track holding circuit |
| CN107196637B (en) * | 2017-04-25 | 2019-11-26 | 西安电子科技大学 | High sampling rate Wide band track holding circuit |
| CN112462255A (en) * | 2019-09-06 | 2021-03-09 | 深圳市睿德龙智能电气有限公司 | Device for monitoring electric equipment |
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