CN104104365B

CN104104365B - A kind of duplication generation circuit of driving pulse

Info

Publication number: CN104104365B
Application number: CN201410369282.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-07-30
Filing date: 2014-07-30
Publication date: 2019-01-25
Anticipated expiration: 2034-07-30
Also published as: CN104104365A

Abstract

The present invention is a kind of duplication generation circuit of driving pulse, as shown in Figure 1.Pass through the network of resistance R, capacitor C and diode D composition in figure, driving pulse is inputted using source, output driving pulse can be directly generated at the both ends diode D in circuit 2, this newly generated driving pulse is identical with the voltage waveform of source driving pulse, as being replicated out；Circuit 2 is characterized in that the current potential of its potential minimum point K point is just higher by the voltage value of fixed DC voltage source E than the current potential of the cathode of source driving pulse (B point), fixed DC voltage source E is also possible to the slowly varying DC voltage source of voltage, and this slow criterion is: its frequency changed is much smaller than the frequency of source driving pulse.

Description

A kind of duplication generation circuit of driving pulse

Technical field

The present invention relates to circuit structure, specifically a kind of circuit that driving pulse can be generated with replication form.

Background technique

In electronic circuit, people usually need to use the identical driving pulse of multichannel, the identical driving arteries and veins of these multichannels Punching, requirement be mutually isolation on current potential, some then needs to keep to have a fixed potential difference each other, this is obtained These driving pulses needed, the common method of people have: 1, it is driven using transformer isolation；2, light-coupled isolation driving.And light Coupling isolation drive also needs in addition to increase isolation control power supply；Although can be realized required function, circuit complexity will cause, Component increases, thus cost is caused to increase the problem of increasing with failure rate.

Summary of the invention

Technical problems to be solved:

The technical problem to be solved in the present invention is that: how according to the feature of physical circuit, solve to exist with simple method Identical driving pulse is led to the problem of in the circuit of different reference potentials.

Solution:

The present invention provides the circuits that one kind can move up together driving pulse overall level, thus in required circuit The driving pulse needed is directly obtained.Physical circuit is as shown in Figure 1, the part wherein worked is: by resistance R, capacitor C and RCD network composed by diode D.

Invention the utility model has the advantages that

The present invention greatlies simplify driving circuit, and the cost of circuit is reduced, and reliability is improved.

Detailed description of the invention

Fig. 1, source input the duplication generation circuit schematic diagram of driving pulse

Fig. 2, source input driving pulse voltage V_ABWaveform diagram

Fig. 3, output driving pulse voltage V_DWaveform diagram

The potential waveform figure of Fig. 4, H point

Specific embodiment

Circuit forms substantially and structure

As shown in Figure 1, driving pulse duplication generation circuit of the present invention is made of following three parts:

(1), driving pulse input circuit, also referred to as circuit 1, the drive pulse signal V of input_AB, also referred to as source inputs driving arteries and veins Punching.

(2), the DC voltage source E that voltage is fixed or voltage is slowly varying.The slowly varying criterion of voltage is: E Change frequency is much smaller than the frequency of source driving pulse, that is to say, that the voltage value of E slowly can get higher or be lower.

(3), the RCD network for being connected in series and being formed with capacitor C again after resistance R is in parallel with diode D.In this RCD network In, cathode one end of D must be connected with capacitor C.Newly generated driving pulse is exported from the both ends of diode D, diode D's Cathode one end is the anode of newly generated driving pulse, and anode one end of diode D is cathode.The parallel circuit of R and D and new production Circuit where raw output pulse is also referred to as circuit 2.

The circuit structure feature of Fig. 1: being successively to be joined end to end to constitute serial loop by above three part.

Two, the course of work

In Fig. 1, if the Zero potential reference of entire circuit is B point, i.e. V_B=0；Reference potential minimum point in circuit 2 For K point, due to there is the presence of fixed DC power supply (or gradual DC power supply) E, the current potential of K point is higher by E than B point current potential always, So having V always in analysis below_K=E.For easy analysis, assume that the forward conduction voltage drop of diode D can neglect always Slightly disregard.

In the following description, above-mentioned B point zero potential is also referred to as ground potential, the potential minimum point K point in circuit 2 Current potential is referred to as reference potential, and circuit 2 therefore referred to as reference potential are higher by the circuit of ground potential E numerical value.

Source inputs driving pulse V_ABIt is inputted from AB two o'clock, V_ABWaveform it is as shown in Figure 2.

Within the 0-t1 time, voltage V_ABIt is 0, i.e. source driving voltage is zero, because B point is Zero potential reference, V_A =0；The anode of DC power supply E charges to capacitor C by diode D, the electricity quickly filled with voltage E on capacitor C, i.e. on capacitor C Press V_C=E, for polarity to be upper just lower negative, the current potential ratio A point current potential of H point is higher by the voltage on capacitor C, i.e. V_H=V_A+V_C=0+E= E。

At this moment the outputting drive voltage V obtained from the both ends diode D_HK=V_H_V_K=E_E=0, the number of this driving voltage Value and the numerical value of the source pulsed driving voltage of input are completely the same, are zero volt.

Within the t1-t2 time, V_ABFor V_O, i.e. source driving voltage is V_O, the current potential of A point current potential ratio B point is higher by V_O, V_A=V_O, Since the voltage on capacitor C cannot be mutated, still there is V_CThe current potential of=E, H point just becomes: V_H=V_A+V_C=V_O+E；From diode D The outputting drive voltage V that both ends obtain_HK=V_H_V_K=V_O+ E-E=V_O, the numerical value of this driving voltage and the source pulse of input are driven The numerical value of dynamic voltage is completely the same, is V_O。

Within the t2-t3 time, voltage V_ABIt is 0, identical as the course of work in the 0-t1 time, circuit starts new work week Phase.

In Fig. 1, the effect of resistance R is: when DC voltage source E is gradual DC voltage source, when supply voltage E is slow When decline, the fixed voltage E originally kept on capacitor C is high by the virtual voltage numerical value than new DC power supply E, and voltage is higher by Part will be discharged by R, it is almost the same with the voltage value for reaching the voltage value on capacitor and DC power supply E, really Circuit is protected to work normally.

Three, conclusion

It is concluded that according to the above analysis

(1), the diode D two by the RCD network of resistance R, capacitor C and diode D composition in Fig. 1, in circuit 2 End produces new drive pulse signal, this new drive pulse signal V_DVoltage waveform and source drive pulse signal electricity Corrugating is completely the same, as shown in Figure 3.The cathode of this newly generated drive pulse signal is the potential minimum point K in circuit 2 Point, K point current potential are higher by the voltage value of fixed voltage source E than cathode (B point) current potential of source drive pulse signal.This means that: The function that circuit of the present invention has is: through above-mentioned RCD network, in the circuit that reference potential is higher by E value than ground potential The drive pulse signal as the driving pulse of source can directly be generated.

(2), the H point in Fig. 1 has obtained moving up the pulse potential V after E value by input source driving pulse entirety current potential_H(B Point current potential is defined as zero potential), as shown in Figure 4.

Claims

1. a kind of driving pulse replicates generation circuit, consist of three parts: source drive pulse signal input circuit；Voltage fix or The slowly varying DC voltage source E of voltage；The RCD network for being connected in series and being formed with capacitor C again after resistance R is in parallel with diode D, In this RCD network, cathode one end of D is connected with one end of capacitor C；Above three part mutually is serially connected to be formed Serial loop, the sun of the anode and the diode D of RCD network of the DC voltage source E that wherein voltage is fixed or voltage is slowly varying Pole one end is connected, the cathode for the DC voltage source E that voltage is fixed or voltage is slowly varying and the cathode of source drive pulse signal It is connected, the anode of source drive pulse signal is connected with the other end of capacitor C；The feature of driving pulse duplication generation circuit It is: by above-mentioned RCD network, has obtained newly generated driving pulse, the cathode one of diode D at the both ends of diode D End is the anode of newly generated driving pulse, and anode one end is cathode；The driving pulse newly produced is close compared with the driving pulse of source It is seemingly identical, only there are minute differences in impulse amplitude, the representative value of this minute differences is exactly the forward voltage drop of diode D 0.7V, the minute differences in this impulse amplitude do not influence to actually use completely；The whole current potential ratio of newly generated driving pulse The whole current potential of source driving pulse is just higher by the voltage value of DC voltage source E.

2. a kind of driving pulse replicates generation circuit, consist of three parts: source drive pulse signal input circuit；What voltage was fixed DC voltage source E；Diode D and capacitor C are connected in series and the CD network that is formed, in this CD network, cathode one end of D and electricity The one end for holding C is connected；Above three part is mutually serially connected to form serial loop, wherein the fixed DC voltage of voltage The anode of source E is connected with anode one end of the diode D of CD network, and the cathode of the fixed DC voltage source E of voltage and source are driven The cathode of moving pulse signal is connected, and the anode of source drive pulse signal is connected with the other end of capacitor C；The driving pulse is multiple Generation circuit processed is characterized by above-mentioned CD network, has obtained newly generated driving pulse at the both ends diode D, and two Cathode one end of pole pipe D is the anode of newly generated driving pulse, and anode one end is cathode；The driving pulse newly produced and source drive Pulsion phase ratio, be it is approximately uniform, only have minute differences in impulse amplitude, the representative value of this minute differences is exactly diode The forward voltage drop 0.7V of D, the minute differences in this impulse amplitude do not influence to actually use completely；Newly generated driving pulse Whole current potential is just higher by the voltage value of DC voltage source E than the whole current potential of source driving pulse.