CN103475345B - High-speed pulse bonder - Google Patents
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- CN103475345B CN103475345B CN201310381193.5A CN201310381193A CN103475345B CN 103475345 B CN103475345 B CN 103475345B CN 201310381193 A CN201310381193 A CN 201310381193A CN 103475345 B CN103475345 B CN 103475345B
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- 229910052732 germanium Inorganic materials 0.000 description 2
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Abstract
High-speed pulse bonder, belongs to digital signal transmission technique field.Realize multiple switches in capacitive source and be respectively provided with different potentials and open circuit pressure reduction when controlling simultaneously, each switch drive the different pressure reduction problems existed between signal and main control circuit.It is divided into four parts: part A is to adapt to the different pressure reduction of existence between input and output with emitter-base bandgap grading constant-current source；Part B prevents the improper electric current of emitter-base bandgap grading constant-current source；The effect of C portion electric current concurrent g realizes drive signal current transmission；Realize the output of control signal with the electric current of electric current concurrent g in D part.Can be as digital signal isolation transmission or replacement optocoupler application under certain condition etc..
Description
Technical field
This technology belongs to digital signal transmission technique field.
Background technology
In the capacitance matrix of capacitive source, the mode of switching tube is driven to need to use isolation drive mode.Requirement be speed fast,
The rise and fall of switching waveform want consistent, further, since the switching tube of capacitive source is multiple works together along the most precipitous, time delay
Making, the drive circuit of each switching tube is required to independent input pulse, so driving electric current the least, is exactly preferably permissible
Directly driving with digit chip, one is that the general power consumed is little, and two is to simplify driving structure.Existing isolation drive mode
There are optocoupler and transformator.The speed of passive optocoupler cannot meet the capacitive source requirement to switching waveform, and switching waveform is the most precipitous,
Time delay is inconsistent, and during test, due to the overlap of switching waveform, to often result in the efficiency of capacitive source the lowest；Active high speed photo coupling is permissible
Accomplishing that switching waveform is precipitous, time delay is consistent, but in the switching tube of capacitance matrix drives, be at the drive part of each switching tube
Introducing one drives power supply extremely difficult；Another feature of active and passive optocoupler is that the diode current of transmitting terminal all will not
Less than 6 milliamperes, when driving a switch matrix, driving total current is a no small challenge to the power supply of control system.Become
Depressor drives can accomplish isolation, but when the time of capacitive source light load switching waveform is oversize, causes in switching waveform
Between fractional distortion, drive bad, two is that the volume of transformator is bigger, in addition it is also necessary to doing magnetic field shielding, the switching waveform of transformator is also
The most precipitous.The present invention is exactly to be loaded into asking of drive circuit for the control data of the switching tube of master controller in solution capacitive source
Topic.
Summary of the invention
The schematic diagram of high-speed pulse bonder such as Fig. 1, it is divided into tetra-parts of A, B, C, D, and A is constant-current source, and B is counnter attack
Pressure, C is electric current concurrent, and D is to drive output.Application conditions is: V1 point current potential is higher than V2 point current potential, and V3 point current potential is higher than V4 point electricity
Position.Explanation each several part operation principle separately below.
Part A.Connection figure such as Fig. 2 in the entire system during application.In the presence of there is no electric current I5, the most whole system
System does not has Article 3 branch road, and when meeting potential condition V1 > V2 and E1 > E2, the state of constant-current source determines that: I1=I2, I3 simultaneously
=I4, the most also there is no need to use the constant current structure of part A.But during actual application, either what system all exist common ground or
The situation in common-battery source, the current potential of four points in input/output port in Fig. 1: V1, V2, V3, V4, any one point is all probably
The highest being also likely to be is minimum.Additionally in the driving of capacitive source, the switching circuitry of capacitance matrix is more than one, so
At this moment situation becomes complicated, and in Fig. 2, the electric current of I5 can be positive current, it is also possible to be negative current, meanwhile, I1=I2 and I3=I4
No longer set up.After adding water conservancy diversion diode D1, the D2 shown in Fig. 1, I3, I4 negative current in Fig. 2 can be respectively by D1, D2
Limiting, the state of the most whole constant-current source is: in Fig. 2, I1, I2, I3, I4 are only positive current, and I5 can just can bear.When I1 is at R1
On the pressure drop conducting voltage more than Q3 time, Q3 begins to turn on, and the voltage of c point is raised by the colelctor electrode of Q3, the pressure of ac point-to-point transmission
Fall reduces, and the base current of Q1 reduces, and makes to flow through the electric current of R7 and electric current I3 reduces simultaneously, plays the work of suppression maximum current
With.In like manner flowing through the base current of Q2 when being controlled by Q4, the electric current and the electric current I4 that flow through R7 can reduce equally.Flow through the electric current of R7
Pressure reduction and resistance R1, R2, R7 by V1-V2 point together decide on.Because the existence of Q3 and Q4, the base current of Q1 and Q2 is not
Equal, this also makes the tube voltage drop of Q1 and Q2 can be inconsistent, makes constant-current source structure be adapted to V1 to E1 point and E2 arrives
The requirement of the different pressure drops of V2 point, such as any saturation conduction in Q1 and Q2 and the weak conducting of another.Constant-current source structure
Limit the electric current being input to V1, V2 point, adapt to the different differential pressure requirements between control system from switches set simultaneously.Due to Q1
Being common base electric current (base stage current-limiting resistance is R7) with Q2, the voltage difference of only V1 Yu V2 is more than two base-emitter voltages
Time, Q1 and Q2 just can be the most open-minded, and the base current of Q1 and Q2 just can exist.C1 and C2 is the rising edge in order to switch and decline
Along more precipitous setting: electric current is loaded directly into the emitter stage of Q1 and Q2 by moment C1, C2 meeting short-circuit resistance R1, R2 of holding,
Make it the most open-minded；The voltage of moment C1, C2 storage closed becomes back-pressure makes switching tube Q1, Q2 between V1 to V2 close rapidly
Close.
Part B is to prevent back-pressure, i.e. limits the effect of constant-current source negative current.Back-pressure is due to the physics of audion itself
Structure causes, because audion is equivalent to the PN junction of two differential concatenations.In Fig. 2, when V1 point voltage is higher than E2 point voltage
I4 is negative current, is negative current when V1 point voltage is less than E1 point voltage I1, I3；When V2 point voltage is less than E1 point voltage, I3 is negative
Electric current, is negative current when V2 point voltage is higher than E2 point voltage I2, I4.So needing to add diode D1, the D2 in Fig. 1, prevent
Back-pressure causes abnormal electric current, makes constant-current source work abnormal.V4 point in i.e. Fig. 1 meets V4 > V1 time, D1 is reverse-biased cut-off
, < during V2, D2 is reverse-biased cut-off to V4.So I1, I2, I3, I4 is just only positive current.
Two parts of C and D to complete the driving function in the case of three kinds.Low electricity can only be flowed to by high potential point according to electric current
Site, so being known by application conditions V1 > V2 and V3 > V4, three kinds of situations of 4 point voltages are: when V2 is minimum voltage point
Time；When V4 is minimum voltage point；When the system at V1, V2 place does not has electrical communication with the system at V3, V4 place.
The first situation be the V2 in Fig. 1 be voltage minimum point, 4 point voltages meet V1 > V3 > V4 > V2 or V3 > V1 > V4 >
V2 or V3 > V4 > V1 > V2, the sense of current such as Fig. 3, control current direction V2.Because concurrent g is at V4 point, so V4 point and V1, V2
Voltage relationship just can affect driving current direction.When V4 < during V1, drive electric current I2=I1+I3, at this moment Q5 conducting make Q7 turn on,
Q6 conducting makes Q8 turn on, and output electric current is determined by the internal resistance parallel value of Q7 and Q8, and output pressure drop is by the parallel transistor pressure drop of Q7 and Q8
Determine.As V4 > V1 time, the electric current I1 in Fig. 3 is because the D1 in Fig. 1 is reverse-biased and be zero.Do not have reverse-biased while that Q5 being not turned on yet, because of
For resistance R3, reverse leakage current is bypassed.Q7 ends because of Q5 cut-off, drives electric current only to be flowed to f point by V4.Now I2=I3,
Q6 conducting makes Q8 turn on, and output electric current is determined by Q8 internal resistance, and output pressure drop is determined by Q8 tube voltage drop.
The second situation be the V4 in Fig. 1 be voltage minimum point, 4 point voltages meet V1 > V2 > V3 > V4 or V1 > V3 > V2 >
V4 or V3 > V1 > V2 > V4, the sense of current such as Fig. 4, control current direction V4.Fig. 1 that electric current I2 in Fig. 4 causes because of V2 > V4
In D2 reverse-biased and be zero, Q6 is not turned on also not having reverse-biased, because reverse leakage current is bypassed by resistance R4 simultaneously.Q8 is because Q6 cuts
Only end, drive electric current only to be flowed to V4 by e point.Now I1=I3, Q5 conducting makes Q7 turn on, and output electric current is determined by Q7 internal resistance
Fixed, output pressure drop is determined by Q7 tube voltage drop.
The third situation is actual is exactly the situation of two mutually isolated systems, i.e. the system at V1, V2 place and V3, V4 institute
System be fully current isolation, 4 point voltages only need to meet application conditions V1 > V2 and V3 > V4, controls electric current only by V1
Flow to V2, such as Fig. 5.Owing to two systems do not have electrical communication, diode D1 and D2 the most to there is not reverse-biased problem, so now
Electric current I1=I2, Q5, Q6 all because of forward bias turn on, drive Q7, Q8 turn ons respectively, export electric current by the internal resistance of Q7, Q8 also
Connection value determines, output pressure drop is determined by Q7, Q8 parallel transistor pressure drop.
Application parameter is analyzed
Minimum input voltage, maximum input current
Such as Fig. 6, input current has two loops: Article 1 is the base loop of emitter-base bandgap grading constant-current source: V1-a-c-d-b-V2；
Article 2 is the collector loop of emitter-base bandgap grading constant-current source: V1-a-e-g-f-b-V2.Q1, Q2 are in magnifying state, and Q3, Q4 are places
In closing on saturation, Q5, Q6 are on off state, and D1, D2 are on off state.Minimum pressure drop, maximum current are i.e. three poles
The saturation of pipe, uses germanium tube average pressure drop to take 0.3V, and minimum input voltage is 8 tube voltage drops 2.4V altogether；Article two, branch road
Electric current all take 0.2 milliampere (this electric current be enough to make germanium triode saturated), input current is 0.4 milliampere to the maximum.Input voltage
All can drive with the digit chip of input current 5V.
Output pulse build-up time
Such as Fig. 1, when V1-V2 exist pressure reduction make Q1, Q2 begin to turn on time, emitter resistance R1, R2 begin to produce pressure drop,
Owing to R1, R2 are the emitter-base bandgap gradings being connected on Q1, Q2, so its restriction is the electric current inputting whole circuit.When the pressure on R1, R2
When fall makes Q3, Q4 turn on, Q3 makes the base stage c point voltage of Q1 rise close to V1, then the base-emitter voltage Vac of Q1 declines, and makes
The base current of Q1 reduces, and the electric current controlling to flow into Q1 emitter-base bandgap grading increases further, reaches the purpose of constant current；In like manner, in symmetry
In the constant current structure of Q2, Q4 composition, operation principle is the same.Two emitter-base bandgap grading constant-current sources are only limiting maximum input current not
It is real constant-current source, so they do not interfere with switch while achieving the goal sets up the time.Q1, Q2 colelctor electrode and Q5,
Q6 base stage is connected respectively, and when Q5, Q6 base stage is by electric current, Q7, Q8 just can begin to turn on, and only reach the full of Q7, Q8
The output that just can make whole pulse coupler with electric current enters opening state.When the most only Q5, Q6 are completely switched off, outlet tube
Q7, Q8 just can be completely switched off.So switch time is completely by determining the switch time of Q5, Q6.
Isolation voltage when opening and do not open
Such as Fig. 1, find out from the loop V1-a-e-g-f-b-V2 of input V1, V2 to outfan V3, V4, be input to output
Pressure reduction mainly determined by the pressure reduction of a point to e point and b point to f point.When Q1, Q2 do not open, the colelctor electrode of Q1, Q2 is pressure and
The back-pressure of D1, D2 determines to be input to the isolation voltage value of output；When Q1, Q2 open, the colelctor electrode peak power of Q1, Q2 determine every
Ionization voltage value.
Outfan open-circuit voltage
Such as Fig. 7, a total of three of the voltage circuit from V3 to V4: L1, L2, L3.L1 loop pressure by the colelctor electrode of Q7-
Decision that emitter-base bandgap grading is pressure, L2 loop pressure by the pressure decision of colelctor electrode-emitter-base bandgap grading of Q6, L3 loop pressure by the colelctor electrode of Q8-
Decision that emitter-base bandgap grading is pressure.I.e. outfan open-circuit voltage is by the pressure decision of colelctor electrode-emitter-base bandgap grading minimum in tri-pipes of Q6, Q7, Q8.Q5 because of
Its pressure voltage of existence for concurrent g does not affect the open-circuit voltage values of V3 to V4.
Accompanying drawing explanation
Fig. 1 high-speed pulse coupler circuit schematic diagram
Fig. 2 emitter-base bandgap grading constant-current source loop current figure when system is applied
Fig. 3 V2 is driving sense of current figure during minimum voltage point
Driving sense of current figure during Fig. 4 V4 minimum voltage point
Sense of current figure when two shielding systems of Fig. 5 drive
The voltage drop loop of Fig. 6 emitter-base bandgap grading constant-current source and loop current figure
Voltage circuit figure during Fig. 7 outfan open circuit
The application in capacitive source of Fig. 8 pulse coupler connects figure
Fig. 9 pulse coupler replaces optocoupler to use between two systems and connects figure
Detailed description of the invention
It is applied to the drive system of capacitive source, as the isolation of control circuit Loading Control pulse to switch tube driving circuit
Pulse coupler.
As described in " background technology " part, in the control of capacitive source, it is desirable that multiple switching tubes complete electric capacity square
The transformation of electrical energy of battle array, uses pulse coupler that the control pulse of control circuit just can be loaded into switching tube easily and drives electricity
Road.
Such as Fig. 8, the power supply of one end parallel connection connected control system of the input of pulse coupler or ground, another terminates digit chip
Output, the outfan of pulse coupler can directly be attempted by switching tube drive circuit input on.From switching tube to numeral
The pressure reduction of chip is adapted to by the emitter-base bandgap grading constant-current source of pulse coupler, and emitter-base bandgap grading constant-current source is only by the maximum current allowed, with numeral
Chip is unrelated to the pressure reduction of switch tube driving circuit, unrelated with the positive-negative polarity of pressure reduction.Whether pulse coupler has output, only takes
Certainly whether the input in pulse coupler has pressure reduction and meets application conditions V1 > V2, V3 > V4, defeated with pulse coupler
Enter end be common ground or common-battery source unrelated.
Apply as pulse optocoupler
The premise of application is: the leakage current of pulse coupler to meet the leakage current requirement of applied system, because arteries and veins
Rush coupler input (V1, V2) and time outfan (V3, V4) there is concurrent loop, between inputting and exporting, having electric leakage circulation
Cross.Pulse coupler uses only as pulse transmission, it is impossible to uses as linear optical coupling, is suitable only for transmitting digital signals.
As optocoupler, need also exist for meeting application conditions input, the forward voltage drop condition of outfan and relevant pressure and driving
Current requirements.
When transmission data exist pressure reduction between two systems, cannot directly transmit one group of data, need with optocoupler complete
Cheng Shi, pulse coupler just can replace easily.Its driving electric current is little, it is not necessary to the accessory power supply of high speed photo coupling, and
Response speed does not has the conversion time of electrical-optical-optical-electronic, it be solely dependent upon 4 of outfan series connection switching tubes (Q5, Q6,
Q7, Q8) response time.Such as Fig. 9, digital display circuit 1 is data sending terminal, and digital display circuit 2 is data receiver.In system 2,
The input of pulse coupler has one end to connect together, and can supply with the power supply (V1 is in parallel) of welding system 1 or ground (V2 is in parallel)
System 1 provides and drives electric current to use, and the other end sends data as the single ended inputs of data for system 1.Pulse coupler
Outfan also have one end to connect together, as the common port received, can be with the power supply of welding system 2 (V3 is in parallel) or ground (V4
In parallel), it is provided that an electric current is for detecting whether there are data to be input to pulse coupler, and the other end is used for receiving data to controlling
System.
Claims (1)
1. the pulse coupling circuit structure being made up of crystal triode, diode, resistance, electric capacity, its three spies comprised
Levy for:
1), one end of resistance one (R1), one end of electric capacity one (C1), the emitter stage of audion three (Q3) are all connected with one end of input
(V1), the other end of resistance one (R1), the other end of electric capacity one (C1), the base stage of audion three (Q3) are all connected with audion one
(Q1) emitter stage, the base stage of audion one (Q1), the colelctor electrode of audion three (Q3) be all connected with one end of resistance seven (R7), and three
The base stage of pole pipe two (Q2), the colelctor electrode of audion four (Q4) are all connected with the other end of resistance seven (R7), the one of resistance two (R2)
End, one end of electric capacity two (C2), the base stage of audion four (Q4) are all connected with the emitter stage of audion two (Q2), resistance two (R2)
The other end, the other end of electric capacity two (C2), the emitter stage of audion four (Q4) are all connected with the other end (V2) of input；
2), the colelctor electrode of the positive pole connecting triode one (Q1) of diode one (D1), one end of resistance three (R3), audion five
(Q5) emitter stage is all connected with the negative pole of diode one (D1), the other end of resistance three (R3), the base stage of audion five (Q5), electricity
Resistance one end of four (R4), the base stage of audion six (Q6) are all connected with the other end (V4) of output, the other end of resistance four (R4), three
The emitter stage of pole pipe six (Q6) is all connected with the positive pole of diode two (D2), the negative pole connecting triode two (Q2) of diode two (D2)
Colelctor electrode；
3), the colelctor electrode of audion seven (Q7), one end of resistance six (R6), the emitter stage of audion eight (Q8) are all connected with output
One end (V3), the base stage of audion eight (Q8), the other end of resistance six (R6) are all connected with the colelctor electrode of audion six (Q6), three poles
The base stage of pipe seven (Q7), one end of resistance five (R5) are all connected with the colelctor electrode of audion five (Q5), the current collection of audion eight (Q8)
Pole, the other end of resistance five (R5), the emitter stage of audion seven (Q7) are all connected with the other end (V4) of output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310381193.5A CN103475345B (en) | 2013-07-21 | 2013-08-20 | High-speed pulse bonder |
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| CN201310321248 | 2013-07-21 | ||
| CN2013103212483 | 2013-07-21 | ||
| CN201310321248.3 | 2013-07-21 | ||
| CN201310381193.5A CN103475345B (en) | 2013-07-21 | 2013-08-20 | High-speed pulse bonder |
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| CN103475345A CN103475345A (en) | 2013-12-25 |
| CN103475345B true CN103475345B (en) | 2016-08-17 |
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| IL240571A (en) * | 2015-08-13 | 2016-12-29 | Grauer Yoav | Pulsed light illuminator for various uses |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201536357U (en) * | 2009-11-13 | 2010-07-28 | 美的集团有限公司 | Driving device of IGBT |
| CN103066967A (en) * | 2012-12-10 | 2013-04-24 | 广州金升阳科技有限公司 | Drive circuit |
-
2013
- 2013-08-20 CN CN201310381193.5A patent/CN103475345B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201536357U (en) * | 2009-11-13 | 2010-07-28 | 美的集团有限公司 | Driving device of IGBT |
| CN103066967A (en) * | 2012-12-10 | 2013-04-24 | 广州金升阳科技有限公司 | Drive circuit |
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