CN100571034C - Pulse fast edge conversion device - Google Patents
Pulse fast edge conversion device Download PDFInfo
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- CN100571034C CN100571034C CNB200710050214XA CN200710050214A CN100571034C CN 100571034 C CN100571034 C CN 100571034C CN B200710050214X A CNB200710050214X A CN B200710050214XA CN 200710050214 A CN200710050214 A CN 200710050214A CN 100571034 C CN100571034 C CN 100571034C
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- pulse
- shaping
- step recovery
- constant
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Abstract
The invention provides a kind of pulse fast edge conversion device, comprise forward and reverse step recovery diode pulse fast edge shaping circuit that constitutes in parallel, forward and reverse step recovery diode one end in parallel along the pulse towards signal output part, and is received the pulse signal of shaping for fast by a resistance; The other end is received pulse direct current bias supply end.When step recovery diode enters reverse ending by forward conduction, because few sub-effect has very big reverse current in the step recovery diode, when reverse current disperses the few son in the diode when clean, time is tq, and the electric current in the diode tends to reverse saturation current rapidly, and the time is t
t, the voltage in the load is constant during tq like this, at t
tTime is with interior rapid decline or rising.Utilize the step recovery characteristics of step recovery diode, greatly rising/the fall time of acceleration pulse, its time equals the reverse recovery time of step recovery diode, thereby realizes that paired pulses is fast along the purpose of shaping.
Description
Technical field
The invention belongs to the high-speed pulse technical field of signal generation, specifically relate to a kind of pulse fast edge conversion device.
Background technology
The high-speed pulse signal is the key factor that constitutes test macro, all is widely used in the industry of each and electronic correlation such as communication, radar, semiconductor manufacturing, integrated circuit testing, tests microprocessor and geology detecting.Simultaneously, in ultra-wideband communications, radar, guidance and Oscilloscope Calibration, the high-speed pulse signal source there is very big demand.
Along with being extensive use of of microelectric technique develop rapidly and radio circuit, the performance index of the pulse signal source that its system testing is required also improve constantly, and the high-speed pulse generation technique progressively becomes the basis of many high speed circuits and high-performance equipment development and test.Along switch technology important effect is arranged in the high-speed pulse signal generation apparatus fast,, be requisite in ultrahigh speed system testing, semiconductor detection and ULTRA-WIDEBAND RADAR, the ultra-wideband communications fast along the indispensable feature that is high repetitive frequency pulsed, ultra-narrow pulse and ultra-wideband communications pulse signal.
Along the pulse towards the generation of signal, mainly be directly to produce the ultra-narrow pulse signal fast, and utilize its special nature to obtain the minimum pulse rising/trailing edge time by tunnel diode, step recovery diode, trapped plasma avalanche triggered transit time diode, avalanche transistor.Traditional is quick along the pulse towards the application of signal, is limited by the programmability and the controllability of pulse signal greatly.The numeral synthesis type produces the programmable pulse signal because it is controlled conveniently, adjusts resolution height, precision advantages of higher, and is widely used.But,, still lack concrete pulse fast edge conversion device at present for the method for generating pulse of synthesis type.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency of the prior art, a kind of pulse fast edge conversion device of providing convenience for the generation of high-speed pulse signal is provided.
For achieving the above object, pulse fast edge conversion device of the present invention, comprise forward and reverse step recovery diode pulse fast edge shaping circuit that constitutes in parallel, forward and reverse step recovery diode one end in parallel along the pulse towards signal output part, and is received the pulse signal of shaping for fast by a resistance; The other end is received pulse direct current bias supply end.
Step recovery diode is a kind of special variable capacitance diode, is used in pulse-shaping stage device in pectination spectrum generator, frequency multiplier and the pulse generator usually.Then utilize step recovery diode to have the shaping on short characteristics realization paired pulses rising/trailing edge edge reverse recovery time in the present invention:
When step recovery diode by forward conduction enter oppositely by the time because few sub-effect has very big reverse current in the step recovery diode in a period of time, when reverse current disperses the few son in the diode when clean, the time is t
q, t
qFor few son disperses and recombination time, the electric current in the diode tends to reverse saturation current-I rapidly
0, the time is t
t, t
tFor the PN junction barrier capacitance time of discharging and recharging is that step recovery diode is by the big reverse current trend reverse saturation current time.This process shows in the load that is attached thereto: the voltage in the load is constant during tq, at t
tTime is with interior rapid decline or rising.Utilize this step recovery characteristics of step recovery diode, greatly rising/the fall time of acceleration pulse, its time equals the reverse recovery time of step recovery diode, thereby realizes that paired pulses is fast along the purpose of shaping.
As improvement, pulse fast edge conversion device of the present invention also comprises the difference channel that two high-frequency triodes or speed-sensitive switch triode are formed, the pulse signal for the treatment of shaping carries out shaping and amplifies, and preliminary adjustment is rising/fall time together, outputs to described pulse fast edge shaping circuit then.
As further improvement, two high-frequency triodes of described difference channel or the emitter of speed-sensitive switch triode are by a constant-current source, receive negative supply, collector electrode is connected to a constant pressure source by collector resistance separately, treat that the pulse signal of shaping imports from base stage, shaping outputs to described pulse fast edge shaping circuit from collector electrode after amplifying again.
The high level of the output pulse signal of constant pressure source control difference channel, can control the voltage stabilizing level of constant pressure source output by peripheral circuit setting, this adjustment will help being adapted to forward and reverse step recovery diode pulse fast edge shaping circuit that constitutes in parallel of rear end different parameters.
The amplitude of the output pulse signal of constant-current source control difference channel can be controlled the constant current that constant-current source is exported by peripheral circuit setting, and this adjustment will guarantee effectively that output amplitude satisfies the step recovery condition of the step recovery diode of different parameters.
Like this can be by nonlinear mode, the amplitude and the level of independent control difference channel output pulse signal recover condition with the step that satisfies step recovery diode in the pulse fast edge shaping circuit.
Pulse fast edge conversion device of the present invention utilizes differential amplification principle of constant-current source and step recovery diode fast along producing principle, realize treating the pulse signal of shaping by difference channel, shaping as the pulse signal of digital level is amplified, finish the conversion on the edge, front and back of pulse by the step recovery diode of forward and reverse parallel connection, reach 80pS minimum rising/fall time.
Simultaneously, if change the step recovery diode of different index parameters, by adjusting constant source voltage, constant-current source electric current, pulse fast edge conversion device of the present invention can be finished multiple level mode digital pulse signal, even level amplitude range input pulse signal more widely, promptly treat the pulse signal rising/trailing edge conversion of shaping, obtain same magnitude, different rising/fall times fast along the pulse towards signal.
In addition, treating the generation of the pulse signal of shaping, generally is to select according to the output pulse signal index of pulse signal generation systems.Present alternative method for generating pulse has data type programmable pulse generating technique, Waveform Synthesis Technology able to programme, oscillating circuit technology, and, be the pulse generation technique of core as avalanche transistor, tunnel diode and step recovery diode etc. with discrete component.The designer need select suitable pulse signal production method according to the pulse signal demand of reality.
Description of drawings
Fig. 1 is a kind of embodiment theory diagram of pulse fast edge conversion device of the present invention;
Fig. 2 is interior part, the i.e. circuit diagram of pulse fast edge conversion device of frame of broken lines among Fig. 1;
Fig. 3 is V in Fig. 2 circuit diagram
IN+, V
XAnd V
OUTOscillogram.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention is described.What need point out is that although similar parts appear in the different accompanying drawings, they are endowed similar reference numerals.In addition, in the following description, when perhaps the detailed description of known function that adopts and design can desalinate subject content of the present invention, these were described in here and will be left in the basket.
Fig. 1 is a kind of embodiment theory diagram of pulse fast edge conversion device of the present invention, and wherein frame of broken lines inside is divided into pulse fast edge conversion device of the present invention.
In the present embodiment, pulse fast edge conversion device produces the programmable pulse signal to digital synthesis type and carries out the pulse fast edge conversion, constitutes a programmable high-speed pulse generator with peripheral circuit.Wherein, digit driver 1 produces the programmable pulse signal as the pulse signal for the treatment of shaping according to input IN, IN*, and its rising/decline is all long.Constant pressure source is connected on the programmable high-speed pulse generator control data bus 3 by a D/A (D/A1) 2, and constant-current source is connected on the programmable high-speed pulse generator control data bus 3 by another D/A (D/A2) 4.By control data bus 3, D/ A 2,4 control constant pressure sources 5 voltages, constant-current source 6 electric currents, make difference channel 7 different amplitudes of output and level pulse signals, recover condition with the step that satisfies step recovery diode in the pulse fast edge shaping circuit 8.
In the present embodiment, digital to analog converter 2,4 and digit driver 1 are the conversion equipment external circuit.
The programmable pulse signal that digit driver 1 produces is with the corresponding input of the mode input difference circuit 7 of difference, if this programmable pulse signal is a single-ended signal, and then can be with another input end grounding of differential input.
The high level of the output pulse signal of constant pressure source 5 control difference channels 7, under the control of D/A 2, the voltage stabilizing level of constant pressure source output, this adjustment will help being adapted to forward and reverse step recovery diode pulse fast edge shaping circuit 8 that constitutes in parallel of rear end different parameters.
The amplitude of the output pulse signal of constant-current source 6 control difference channels 7, under the control of D/A 3, the output amplitude that will effectively guarantee the constant current of constant-current source output, this adjustment satisfies forward and reverse step recovery diode pulse fast edge shaping circuit 8 that constitutes in parallel of different parameters.
The output pulse signal of constant-current source 6 control difference channels 7 is adjusted pulse rising/trailing edge by forward and reverse step recovery diode pulse fast edge shaping circuit that constitutes 8 in parallel, and its high-low level equals the conducting voltage of step recovery diode respectively.
Utilize differential amplification principle of constant-current source and step recovery diode fast along producing principle, realize the shaping amplification of programmable pulse signal by difference channel 7, finish the conversion on the edge, front and back of pulse by the step recovery diode of forward and reverse parallel connection, reach 80pS minimum rising/fall time.
Simultaneously by adjusting constant pressure source 5 voltages, constant-current source 6 electric currents, programming produces the different pulse signals for the treatment of shaping, the pulse fast edge conversion device of present embodiment can be finished multiple level mode digital pulse signal, even the level amplitude range rising of input pulse signal more widely/trailing edge conversion.If change the step recovery diode of different index parameters, with obtain same magnitude, different rising/fall times fast along the pulse towards signal.
In the present embodiment, pulse fast edge conversion device can be divided into two parts: the shaping pulse that difference channel 7, constant pressure source 5, constant-current source 6 constitute and the adjustment on the pulse fast edge shaping circuit 8 paired pulses edges of amplification and forward and reverse step recovery diode formation in parallel.
Fig. 2 is interior part, the i.e. circuit diagram of pulse fast edge conversion device of frame of broken lines among Fig. 1.Among the figure, treat the pulse signal V of shaping
INReceive the forward and reverse input V of difference channel
IN+, V
IN-, i.e. difference triode Q
1With Q
2Base stage, in the present embodiment, by base resistance R
1, R
2Receive difference triode Q
1With Q
2Base stage.
Fig. 3 is V in Fig. 2 circuit diagram
IN+, V
XAnd V
OUTOscillogram.Referring to Fig. 3 (a), treat the pulse signal V of shaping
IN+High-low level be V
H1And V
L1, t
r, t
fIt is its rising/fall time.
Difference triode Q
1With Q
2By emitter resistance R separately
3, R
4Receive constant-current source I
AMP, be connected on the negative supply VEE of difference channel.Difference triode Q
1With Q
2By emitter resistance R separately
5, R
6Receive constant pressure source VIH, be connected on the positive supply VCC of difference channel.
Difference triode that shaping is amplified and constant-current source, constant voltage power supply circuit can be according to the pulse signal V that treats shaping of front end generation
INParameter request select the design.This differential configuration is isolated for impedance and is provided big electric current that bigger benefit is all arranged.Input signal treats that promptly the pulse amplitude of shaping requires greater than 200mV, and difference channel works in nonlinear state.
In the work, difference triode Q
1With Q
2Base stage two point voltages compare, a high triode conducting, low triode ends, the constant-current source electric current is approximately equal to the collector current of turn-on transistor.Referring to Fig. 3 (b), like this because the acting in conjunction of constant-current source and constant pressure source, the output pulse V of difference channel
X, i.e. triode Q
2Collector electrode output, high level V
H2Equal voltage stabilizing level, the high level V of constant pressure source
H2With low level V
L2Poor, promptly output amplitude equals the product of constant-current source electric current and collector electrode output impedance.
Referring to Fig. 3 (b), difference channel is treated the pulse signal V of shaping
IN+Carry out shaping and amplify, preliminary adjustment is rising/fall time together.Among the figure, the output pulse of difference channel is with the pulse signal V that treats shaping
IN+Compare, pulse amplitude increases, and shorten rising/fall time, and transfers neat; Wherein, t
DBe the signal delay time of difference channel generation.
Forward and reverse step recovery diode D
1, D
2Form with the double limiting circuit in parallel, an end passes through resistance R
7With triode Q
2Collector electrode output pulse link to each other with the load (not shown), the other end is received direct current biasing power vd D.Referring to Fig. 3, as triode Q
2The rising edge of collector electrode output pulse when arriving, diode D
1State by positively biased enter into anti-partially because few sub-effect, at time t
qHave very big reverse current in the interior step recovery diode, at t
qDuring this period of time, because the existence of reverse current, fast along the pulse towards signal V
OUTAttitude was constant before voltage was kept, as diode D
1After interior few son is dispersed, V
OUTVoltage is at t
tHop in time is as diode D
2Last voltage surpasses diode D
2Conducting voltage the time, diode D
2The positively biased conducting, the output voltage in the load rises to D
2Conducting voltage VD
2The time by clamped; In like manner, when the trailing edge of pulse arrives, diode D
2State enter into by positively biased that anti-tq disperses and recombination time for few son partially, during tq, V
OUTLast voltage is constant for this reason, as diode D
2After interior few son is dispersed, fast along the pulse towards signal V
OUTVoltage is at t
tHop is to D in time
1Conducting voltage VD
1So just utilize this step recovery characteristics of step recovery diode, greatly rising/the fall time of acceleration pulse, its time equals the reverse recovery time of step recovery diode, thereby realizes that paired pulses is fast along the purpose of shaping.
By selecting suitable step recovery diode, about the pulse amplitude 1.5V after the shaping, high level V
OH: VDD+750mV, low level V
OL: VDD-750mV, rising, fall time can reach in the 100pS.In addition, can adjust the value of direct current biasing power vd D as required, change direct current biasing thereby add.But change the amplification output of checking the mark that VDD then must change front end, to satisfy output amplitude greater than 1000mV, high level is greater than VDD+1000mV, and low level is less than VDD-1000mV.
Although above the illustrative embodiment of the present invention is described; but should be understood that; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and the spirit and scope of the present invention determined in; these variations are conspicuous, and all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (1)
1. pulse fast edge conversion device, comprise forward and reverse step recovery diode pulse fast edge shaping circuit that constitutes in parallel, forward and reverse step recovery diode one end in parallel along the pulse towards signal output part, and is received the pulse signal of shaping for fast by a resistance; The other end is received pulse direct current bias supply end, it is characterized in that, also comprise the difference channel that two high-frequency triodes or speed-sensitive switch triode are formed, the pulse signal for the treatment of shaping carries out shaping and amplifies, preliminary adjustment is rising/fall time together, outputs to described pulse fast edge shaping circuit then;
Two high-frequency triodes of described difference channel or the emitter of speed-sensitive switch triode are by a constant-current source, receive negative supply, collector electrode is connected to a constant pressure source by collector resistance separately, treat that the pulse signal of shaping imports from base stage, shaping outputs to described pulse fast edge shaping circuit from collector electrode after amplifying again;
Described constant pressure source is connected on the programmable high-speed pulse generator control data bus by the constant pressure source D/A, and constant-current source is connected on the programmable high-speed pulse generator control data bus by the constant-current source D/A;
By described control data bus, constant pressure source D/A, constant-current source D/A control constant source voltage, constant-current source electric current, make difference channel export different amplitudes and level pulse signal, recover condition with the step that satisfies step recovery diode in the pulse fast edge shaping circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710050214XA CN100571034C (en) | 2007-10-11 | 2007-10-11 | Pulse fast edge conversion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710050214XA CN100571034C (en) | 2007-10-11 | 2007-10-11 | Pulse fast edge conversion device |
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| CN101141122A CN101141122A (en) | 2008-03-12 |
| CN100571034C true CN100571034C (en) | 2009-12-16 |
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| CN101729045B (en) * | 2009-09-27 | 2011-10-26 | 上海大学 | Signal detecting and shaping circuit, and thunder light triggered timer and self-clocking runway thereof |
| CN103178809B (en) * | 2013-02-04 | 2016-02-17 | 深圳市鼎阳科技有限公司 | A kind of DDS porch control method, module and pulse signal generator |
| CN103929156B (en) * | 2014-04-01 | 2015-06-03 | 温州大学 | System for preventing reverse recovered charges in DUT |
| CN104155590B (en) * | 2014-08-14 | 2015-09-02 | 温州大学 | Diode forward recovers parametric synthesis test analysis platform |
| CN110391799A (en) * | 2019-08-29 | 2019-10-29 | 电子科技大学 | A kind of picosecond pulse generating unit |
| CN112255662A (en) * | 2020-10-14 | 2021-01-22 | 南昌华亮光电有限责任公司 | Gamma camera based on intelligent time sampling and detection method |
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| 简单有效的阶跃管脉冲整形器. 郭卓梁.电子技术，第5期. 1980 |
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| 高性能脉冲发生器脉冲输出通道设计. 李松.中国优秀硕士学位论文全文数据库 信息科技辑，第3期. 2007 |
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