CN1674436A - Narrow pulse generating method and apparatus thereof - Google Patents
Narrow pulse generating method and apparatus thereof Download PDFInfo
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- CN1674436A CN1674436A CN 200510049634 CN200510049634A CN1674436A CN 1674436 A CN1674436 A CN 1674436A CN 200510049634 CN200510049634 CN 200510049634 CN 200510049634 A CN200510049634 A CN 200510049634A CN 1674436 A CN1674436 A CN 1674436A
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Abstract
The present invention relates to a narrow-pulse generation method and its device. Said device includes digital signal source and three differential amplifiers connected with said digital signal source and constant-current source. When it is worked, said three differential amplifiers can be utilized together to form the product of two hyperbolic tangential functions which can use the input signal voltage as variable quantity and can obtain the narrow pulse. Said narrow pulse can be used in the ultrawide-band system.
Description
Technical field
The present invention relates to a kind of method for generation and device thereof of burst pulse.
Background technology
Ultra broadband (UWB:Ultra Wideband) communication technology is a kind of novel wireless communication technology, and it all has potential and uses widely at aspects such as high-speed indoor wireless communication, target localization, range finding and WLAN (wireless local area network).
In the UWB communication system, a kind of common implementation is to adopt pulse wireless power technology (IR:ImpulseRadio), the pulse wireless power technology directly adopts extremely short burst pulse of duration to produce ultra-broadband signal, the width of burst pulse has only the hundreds of psec usually to several nanoseconds, so signal spectrum can be in the frequency band range of number GHz.The UWB communication system that adopts this burst pulse the to realize ultra-wideband pulse radio (UWBIR) that is otherwise known as.Compare with traditional communication technology, the UWB IR communication technology has significant advantage, and for example simple in structure, anti-multipath interference performance is strong, the signal power spectrum density is low, can be with other system's band sharing etc.
In UWB IR system, the generation of burst pulse is the key issue of system, and the requirement of UWB system paired pulses generation circuit is: circuit complexity is low, low in energy consumption, volume is little, it is integrated etc. to be easy to.Because pulse duration is very little usually, the generation of burst pulse has certain degree of difficulty, and this also is research focus and a key point in the UWB communication system.At present, the pulse implementation has usually: use metal-semiconductor field effect transistor (MESFET) technology, use the snap-off diode technology, use Schottky diode technologies, transmission line technology etc.Regrettably, the power consumption circuit that is unfavorable for that volume integrated, that have is bigger than normal, has too high, that the have cost too complicated, that have that has of above-mentioned method is too high.
Summary of the invention
The purpose of this invention is to provide a kind of be easy to method for generation and device thereof integrated, low in energy consumption, the simple burst pulse of circuit.
The method for generation of burst pulse provided by the invention is characterized in that adopting three differential amplifiers to constitute with the applied signal voltage product of two hyperbolic tangent functions that are variable jointly, obtains burst pulse.
The device that is used for above-mentioned burst pulse method for generation is characterized in that this device comprises:
-derived digital signal: its edge signal is as the pumping signal of subsequent conditioning circuit;
-the first differential amplifier: its input links to each other with derived digital signal, and it is the hyperbolic tangent function of variable that its output produces with the applied signal voltage;
-the second differential amplifier: its input links to each other with derived digital signal, and it is the hyperbolic tangent function of variable that its output produces with the applied signal voltage;
-the three differential amplifier: its input links to each other with derived digital signal, and its output links to each other with the common port of first differential amplifier and the common port of second differential amplifier respectively;
-constant-current source: link to each other with the common port of the 3rd differential amplifier, for the 3rd differential amplifier provides constant current.
The sub-T1 of-pulse output end, T2: link to each other with the output of first differential amplifier and the output of second differential amplifier respectively;
During work, it is the hyperbolic tangent function of variable that the first differential amplifier output produces with the applied signal voltage; It is the hyperbolic tangent function of variable that the second differential amplifier output produces with the applied signal voltage; It is the hyperbolic tangent function of variable that the 3rd differential amplifier output produces with the applied signal voltage; Three differential amplifiers constitute jointly with the applied signal voltage product form of two hyperbolic tangent functions that are variable, and the place obtains burst pulse at pulse output end.
Usually, in device, also be provided with voltage divider, it is connected between signal source output and the 3rd differential amplifier input, like this, by regulating the voltage ratio of voltage divider, the pulse shape that produces burst pulse can be changed, under certain voltage ratio, the burst pulse that is similar to Gaussian pulse can be produced.
Circuit of the present invention is simple, is easy to realize that with integrated circuit cost is low, does not need differentiator just can directly produce burst pulse, and the burst pulse of generation can be used for radio ultra wide band system.
Description of drawings
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is another theory diagram of the present invention;
Fig. 3 is a concrete circuit diagram of implementing of the present invention;
Fig. 4 is the narrow pulse signal time domain waveform figure that the present invention produces;
Fig. 5 is the narrow pulse signal time domain waveform figure that produces of the present invention and the time domain waveform comparison diagram of desirable Gaussian pulse.
Embodiment
With reference to Fig. 1, burst pulse generating means of the present invention comprises:
-derived digital signal 101: its edge signal is as the pumping signal of subsequent conditioning circuit;
-the first differential amplifier 102: its input links to each other with derived digital signal, and it is the hyperbolic tangent function of variable that its output produces with the applied signal voltage;
-the second differential amplifier 103: its input links to each other with derived digital signal, and it is the hyperbolic tangent function of variable that its output produces with the applied signal voltage;
-the three differential amplifier 104: its input links to each other with derived digital signal, and its output links to each other with the common port of first differential amplifier and the common port of second differential amplifier respectively;
-constant-current source 106: link to each other with the common port of the 3rd differential amplifier, for the 3rd differential amplifier provides constant current.
The sub-T1 of-pulse output end, T2: link to each other with the output of first differential amplifier 102 and the output of second differential amplifier 103 respectively;
Burst pulse generating means shown in Figure 2 also comprises voltage divider 105, and voltage divider 105 is connected between signal source 101 outputs and the 3rd differential amplifier 104 inputs.
Fig. 3 is a concrete circuit diagram of implementing of the present invention.The diagram instantiation in, derived digital signal is a digital signal generator, its rising edge from-need 1ns when 20mV rises to 20mV, this edge signal is as the pumping signal of subsequent conditioning circuit.First differential amplifier 102 is made up of triode Q1, Q2, and second differential amplifier 103 is made up of triode Q3, Q4, and the 3rd differential amplifier 104 is made up of triode Q5, Q6, and voltage divider 105 is made up of resistance R 3 and R4.
One end of the base stage of the output of derived digital signal and triode Q1 and Q4 and voltage divider resistance R 3 connects altogether; The collector electrode of the emitter of triode Q1 and Q2 and triode Q5 connects altogether; The collector electrode of the emitter of triode Q3 and Q4 and triode Q6 connects altogether; One end of the emitter of triode Q5 and Q6 and constant-current source connects altogether; The collector electrode of triode Q1 and Q3 and current-limiting resistance R1 and the sub-T1 of pulse output end connect altogether; The collector electrode of triode Q2 and Q4 and current-limiting resistance R2 and the sub-T2 of pulse output end connect altogether.
In conjunction with Fig. 3, operation principle of the present invention is as follows:
If the collector current of triode Q1 and Q2 is respectively I1 and I2, the collector current of triode Q3 and Q4 is respectively I3 and I4, the collector current of triode Q5 and Q6 is respectively I5 and I6, electric current by current-limiting resistance R1 is IA, electric current by current-limiting resistance R2 is IB, and the electric current of constant-current source is I, and the output voltage of voltage divider is V2, the input voltage of derived digital signal is V1, and Vt is a thermal voltage; According to the transmission characteristic of differential amplifier, the pass between them is:
I5-I6＝I*Tanh(V2/(2*Vt))；
I3-I4＝I6*Tanh(V1/(2*Vt))；
I1-I2＝I5*Tanh(V1/(2*Vt))；
In addition, from circuit as can be known, IA=I1+I3, IB=I2+I4, V2=V1*R4/ (R3+R4); Therefore can get:
IA-IB＝I*Tanh(V1/(2*Vt))*Tanh(V1*R4/(R3+R4)/(2*Vt))(1)
Then sub-T1 of pulse output end and T2 place will produce burst pulse as the formula (1), and its oscillogram as shown in Figure 4.Each rising edge of derived digital signal or trailing edge just produce a narrow pulse signal.
If the resistance of choose reasonable voltage divider R3 and R4, just can control the shape of the burst pulse of generation, for example get R4/ (R3+R4)=1.2, promptly can get R4=10 ohm, R3=2 ohm, burst pulse that produce this moment and Gaussian pulse are just very approaching, and the oscillogram of generation and the comparison diagram of desirable Gaussian pulse are as shown in Figure 5.
Claims (3)
1. the method for generation of a burst pulse is characterized in that adopting three differential amplifiers to constitute with the applied signal voltage product of two hyperbolic tangent functions that are variable jointly, obtains burst pulse.
2. the device that is used for the described burst pulse method for generation of claim 1 is characterized in that this device comprises:
-derived digital signal (101): its edge signal is as the pumping signal of subsequent conditioning circuit;
-the first differential amplifier (102): its input links to each other with derived digital signal, and it is the hyperbolic tangent function of variable that its output produces with the applied signal voltage;
-the second differential amplifier (103): its input links to each other with derived digital signal, and it is the hyperbolic tangent function of variable that its output produces with the applied signal voltage;
-the three differential amplifier (104): its input links to each other with derived digital signal, and its output links to each other with the common port of first differential amplifier and the common port of second differential amplifier respectively;
-constant-current source (106): link to each other with the common port of the 3rd differential amplifier, for the 3rd differential amplifier provides constant current.
The sub-T1 of-pulse output end, T2: link to each other with the output of first differential amplifier (102) and the output of second differential amplifier (103) respectively;
3. device according to claim 2 is characterized in that also being provided with in the device voltage divider (105), and it is connected between signal source output and the 3rd differential amplifier input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100496347A CN100550625C (en) | 2005-04-22 | 2005-04-22 | A kind of method for generation of burst pulse and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100496347A CN100550625C (en) | 2005-04-22 | 2005-04-22 | A kind of method for generation of burst pulse and device thereof |
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| CN1674436A true CN1674436A (en) | 2005-09-28 |
| CN100550625C CN100550625C (en) | 2009-10-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471014A (en) * | 2018-10-30 | 2019-03-15 | 江苏赛诺格兰医疗科技有限公司 | A kind of detectable signal simulation forming circuit and detector board test platform |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545840B (en) * | 2010-12-24 | 2016-12-21 | 北京普源精电科技有限公司 | A kind of waveform editing method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471014A (en) * | 2018-10-30 | 2019-03-15 | 江苏赛诺格兰医疗科技有限公司 | A kind of detectable signal simulation forming circuit and detector board test platform |
| CN109471014B (en) * | 2018-10-30 | 2021-01-19 | 江苏赛诺格兰医疗科技有限公司 | Detection signal simulation forming circuit and detector board card test platform |
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| CN100550625C (en) | 2009-10-14 |
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Granted publication date: 20091014 Termination date: 20120422 |