CN105391441B - Low-speed optical coupler accelerating circuit - Google Patents
Low-speed optical coupler accelerating circuit Download PDFInfo
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- CN105391441B CN105391441B CN201510819681.9A CN201510819681A CN105391441B CN 105391441 B CN105391441 B CN 105391441B CN 201510819681 A CN201510819681 A CN 201510819681A CN 105391441 B CN105391441 B CN 105391441B
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Abstract
The present invention provides a kind of low-speed optical coupler accelerating circuits, including low speed photoelectric coupled circuit, carrier release circuit and signal amplification output circuit.Low speed photoelectric coupled circuit is for receiving electric signal, and the on or off under the action of electric signal.Signal amplification output circuit acquires the corresponding voltage to be measured of output voltage of low speed photoelectric coupled circuit, and voltage to be measured is compared with predetermined comparison voltage, if voltage to be measured is greater than or equal to predetermined comparison voltage, high level is then exported, low level is otherwise exported, realization quickly judges high speed signal, it is no longer dependent on the consumption degree of base stage carrier, keep the rising edge of output high speed signal more precipitous, keep signal distortion lower, the signal of output is more stablized.Simultaneously design carrier release circuit, can quick release base stage carrier, make optocoupler rapid operation in NextState, further increase the precision of the high speed signal of output.
Description
Technical field
The invention belongs to photoelectric coupled circuit technical fields, are more particularly to a kind of low-speed optical coupler accelerating circuit.
Background technology
Stronger place is being interfered, is almost being required on high speed circuit plus high speed photo coupling, but the price of high speed photo coupling
Costliness causes the increase of hardware cost.It is come into being based on this some low-speed optical coupler accelerating circuit, is mostly in the prior art
By making triode operation in magnifying state and capacitance or diode being coordinated to form quick discharging circuit, the base stage of optocoupler is made to carry
Stream is rapidly depleting, to carrier depletion to a certain extent when turn off photo-coupler, to corresponding output high speed signal
Waveform.Accelerated release in vitro optocoupler base stage carrier judges although the mode of high speed signal waveform may determine that high speed signal in this
Waveform, but the conducting voltage of triode has range, and in the cut-off of triode, the base stage carrier of triode is also deposited
, although so high speed signal can be received by resulting in, the rising edge of the high speed signal of corresponding output is still relatively more slow,
To make the high speed signal of output generate distortion relative to the high speed signal of reception.
Invention content
The technical problem to be solved by the invention is how using low speed coupler accurately to receive and handle high speed signal.
In order to solve the above technical problem, the present invention provides a kind of low-speed optical coupler accelerating circuit, the circuit includes low speed
Photoelectric coupled circuit, carrier release circuit and signal amplification output circuit；
The low speed photoelectric coupled circuit is for receiving electric signal, and the on or off under the action of electric signal；
The signal amplification output circuit acquires the corresponding voltage to be measured of output voltage of the low speed photoelectric coupled circuit, and will
The voltage to be measured is compared with predetermined comparison voltage, if the voltage to be measured is greater than or equal to the predetermined comparison voltage,
Then the signal amplification output circuit exports high level, and otherwise the signal amplification output circuit exports low level；
The carrier release circuit is connect with the output end of the low speed photoelectric coupled circuit, for discharging the low speed optocoupler
The carrier of circuit.
Preferably, the low speed photoelectric coupled circuit includes low speed optocoupler, the first current-limiting resistance and the first power supply；
One end of first current-limiting resistance is connect with the collector of the low speed optocoupler, first current-limiting resistance it is another
One end is connect with first power supply.
Preferably, the output end of the low speed photoelectric coupled circuit is the emitter of the low speed optocoupler.
Preferably, the carrier release circuit includes absorbing electrostatic capacitor, pull down resistor and fast wink diode；
Described one end for absorbing electrostatic capacitor is connect with the output end of the low speed photoelectric coupled circuit, the absorption electrostatic capacitor
The other end connect with one end of the pull down resistor, the other end of pull down resistor ground connection；The sun of the fast wink diode
Pole is connect with described one end for absorbing electrostatic capacitor, the minus earth of the fast wink diode.
Preferably, the signal amplification output circuit includes the first divider resistance, the second divider resistance, the first signal pull-up
Resistance, the first reverse phase comparator, second source and third power supply；
One end of first divider resistance is connect with the second source, the other end of first divider resistance and institute
State one end connection of the second divider resistance signal, the other end ground connection of the second divider resistance signal；The reverse phase comparator
Inverting input connect with the other end of first divider resistance, the normal phase input end of the reverse phase comparator and the suction
Receive the other end connection of electrostatic capacitor；The output end of the reverse phase comparator exports the high level or low level；Described first
One end of signal pull-up resistor connects the third power supply, and the other end of the first signal pull-up resistor connects the reverse phase ratio
Compared with the output end of device；
The voltage to be measured is the level of the other end for absorbing electrostatic capacitor.
Preferably, the signal amplification output circuit further includes the second current-limiting resistance；
One end of second current-limiting resistance is connect with the other end for absorbing electrostatic capacitor, second current-limiting resistance
The other end connect with the normal phase input end of the first reverse phase comparator.
Preferably, the prevention of first divider resistance, the second divider resistance is arranged to make first divider resistance
The level of the other end is equal to or slightly less than the maximum level of described one end for absorbing electrostatic capacitor.
Preferably, the signal amplification output circuit includes third divider resistance, the 4th divider resistance, second signal pull-up
Resistance, the second reverse phase comparator, the 4th power supply and the 5th power supply；
One end of the third divider resistance is connect with the 4th power supply, the other end of the third divider resistance and institute
State one end connection of the 4th divider resistance signal, the other end ground connection of the 4th divider resistance signal；The second reverse phase ratio
It is connect with the other end of the third divider resistance compared with the inverting input of device, the normal phase input end of the second reverse phase comparator
It is connect with the output end of the low speed photoelectric coupled circuit；The output end of the second reverse phase comparator exports the high level or low electricity
It is flat；One end of the second signal pull-up resistor connects the 5th power supply, and the other end of the second signal pull-up resistor connects
Connect the output end of the second reverse phase comparator；
The voltage to be measured is the level of the output end of the low speed photoelectric coupled circuit.
Preferably, the signal amplification output circuit further includes third current-limiting resistance；
One end of the third current-limiting resistance is connect with the output end of the low speed photoelectric coupled circuit, the third current-limiting resistance
One end connect with the normal phase input end of the second reverse phase comparator.
Preferably, the third divider resistance, the 4th divider resistance resistance value be arranged to make the third divider resistance
The level of the other end is equal to or slightly less than the maximum level of the output end of the low speed photoelectric coupled circuit.
The present invention provides a kind of low-speed optical coupler accelerating circuit, the present invention utilizes signal amplification output circuit by voltage to be measured
It is compared with predetermined comparison voltage, and high level is exported when voltage to be measured is greater than or equal to the predetermined comparison voltage,
Voltage to be measured exports low level when being less than predetermined comparison voltage, realization quickly judges high speed signal, is no longer dependent on base stage load
The consumption degree for flowing son, keeps the rising edge of output high speed signal more precipitous, keeps signal distortion lower, the signal of output is more
Stablize.Design carrier release circuit simultaneously, can quick release base stage carrier, make optocoupler rapid operation in NextState,
Further increase the precision of output high speed signal.In addition, cost of implementation of the present invention is low, extend low speed optocoupler applies model
It encloses, wide market.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
The circuit diagram of the low-speed optical coupler accelerating circuit of the preferred embodiment of Fig. 1 present invention.
Specific implementation mode
Present invention is further described in detail with reference to the accompanying drawings and examples.Following embodiment is for illustrating this hair
It is bright, but cannot be used for limiting the scope of the invention.
A kind of low-speed optical coupler accelerating circuit, the circuit include low speed photoelectric coupled circuit, carrier release circuit and signal
Amplification output circuit；The low speed photoelectric coupled circuit is for receiving electric signal, and the on or off under the action of electric signal；
The signal amplification output circuit acquires the corresponding voltage to be measured of output voltage of the low speed photoelectric coupled circuit, and will be described to be measured
Voltage is compared with predetermined comparison voltage, if the voltage to be measured is greater than or equal to the predetermined comparison voltage, the letter
Number amplification output circuit exports high level, and otherwise the signal amplification output circuit exports low level；The carrier release electricity
Road is connect with the output end of the low speed photoelectric coupled circuit, for the carrier of low speed photoelectric coupled circuit described in quick release, makes optocoupler
Rapid operation is in NextState.
Above-mentioned signal amplification output circuit is by being arranged flexible perception of the predetermined comparison voltage realization to high speed signal, in turn
High level is exported, it is no longer related to the base stage carrier of low speed optocoupler, keep the rising edge of output high speed signal more precipitous, makes letter
Number distortion factor is lower, and the signal of output is more stablized.Carrier release circuit is designed simultaneously, it being capable of quick release base stage current-carrying
Son makes optocoupler rapid operation in NextState, further increases the precision of output high speed signal.
Further, as shown in Figure 1, the low speed photoelectric coupled circuit include low speed optocoupler OPT, the first current-limiting resistance R1 and
First power supply VCC；One end of the first current-limiting resistance R1 is connect with the collector of the low speed optocoupler OPT, first limit
The other end of leakage resistance R1 is connect with the first power supply VCC.The output end of the low speed photoelectric coupled circuit is the low speed optocoupler
Emitter.
Further, as shown in Figure 1, the carrier release circuit include absorb electrostatic capacitor C1, pull down resistor R2 with
And fast wink diode D1；Output end (the i.e. low speed optocoupler of described one end and the low speed photoelectric coupled circuit for absorbing electrostatic capacitor C1
Emitter) connection, the other end for absorbing electrostatic capacitor C1 connect with one end of the pull down resistor R2, and the drop-down is electric
Hinder the other end ground connection of R2；The anode of the fast wink diode D1 is connect with one end of the absorption electrostatic capacitor C1, described fast
The minus earth in wink diode D2.
Further, as shown in Figure 1, the signal amplification output circuit includes the first divider resistance R3, the second partial pressure electricity
Hinder R5, the first signal pull-up resistor R6, the first reverse phase comparator U3, second source VCC_A and third power supply VCC；Described
One end of one divider resistance R3 is connect with the second source VCC_A, the other end of the first divider resistance R3 and described the
One end of two divider resistance R5 signals connects, the other end ground connection of the second divider resistance R5；The first reverse phase comparator
The inverting input of U3 is connect with the other end of the first divider resistance R3, the positive input of the first reverse phase comparator U3
The other end with the absorption electrostatic capacitor C1 is held to connect；The output end of the first reverse phase comparator U3 exports the high level
Or low level；One end of the first signal pull-up resistor R6 connects the third power supply VCC, the first signal pull-up resistor
The other end of R6 connects the output end of the first reverse phase comparator U3；The voltage to be measured is the absorption electrostatic capacitor C1
The level of the other end, i.e. V2 in Fig. 1.Above-mentioned signal amplification output circuit realizes the judgement and amplification to certain high-speed signal,
Wherein amplification is realized by the first reverse phase comparator and the first signal pull-up resistor R6.
Further, as shown in Figure 1, the signal amplification output circuit further includes the second current-limiting resistance R4；Described second
One end of current-limiting resistance R4 connect with the other end of the absorption electrostatic capacitor C1, the other end of the second current-limiting resistance R4 and
The normal phase input end of the first reverse phase comparator U3 connects.
Preferably, the first divider resistance R3, the second divider resistance R5 resistance value be arranged to make the first partial pressure electricity
The level V1 for hindering the other end of R3 is equal to or slightly less than the level V3 of described one end for absorbing electrostatic capacitor C1.Adjust first point
Piezoresistance R3, the second divider resistance R5 resistance value so that V1 is equal to or slightly less than V3, wherein V3 is defeated for low speed photoelectric coupled circuit simultaneously
Go out terminal voltage (i.e. the voltage of the emitter of low speed optocoupler).Preferably, VCC_A is different from VCC.
The worked of the circuit of the present invention is known as：
When the high speed signal of high level is by optocoupler, the triode ON of optocoupler, in conducting moment, by capacitance voltage not
The principle that can be mutated, capacitance C1 are equivalent to short circuit at this time, and voltage V2=V3 ≈ VCC pass through regulation resistance R3, R5 so that first
The reversed pole voltage V1=V3 (V3 is the high level of high speed signal) of reversed comparator U3, when the voltage of high level appears in C1
The other end when, i.e. when V2 points, V2=V3, V1=V2 (or V2 is slightly above V1), the first reversed comparator can be in pull-up electricity at this time
Amplification output high level signal under the action of R6 is hindered, hereafter V2 points voltage is gradually reduced, and when V2 ＜ V1, the first reversed comparator is fast
Speed becomes output low level signal.After the first reverse phase comparator U3 has quickly judged high level, the base stage carrier of optocoupler can lead to
The part and diode (impedance is very low) quick release for crossing capacitive absorption, make optocoupler rapid operation in NextState.Due to
The release process of the single point voltage comparison principle of one reverse phase comparator, optocoupler base stage carrier will not be to the first reverse phase comparator
Judgement impacts so that the first reverse phase comparator output waveform rising edge distortion factor is relatively low, and output waveform stability is stronger.
Further, the signal amplification output circuit includes third divider resistance, the 4th divider resistance, in second signal
Pull-up resistor, the second reverse phase comparator, the 4th power supply and the 5th power supply；One end of the third divider resistance and the 4th electricity
Source connects, and the other end of the third divider resistance is connect with one end of the 4th divider resistance signal, the 4th partial pressure
The other end of resistance signal is grounded；The other end of the inverting input of the second reverse phase comparator and the third divider resistance
Connection, the normal phase input end of the second reverse phase comparator are connect with the output end of the low speed photoelectric coupled circuit；Described second is anti-
The output end of phase comparator exports the high level or low level；One end connection the described 5th of the second signal pull-up resistor
Power supply, the other end of the second signal pull-up resistor connect the output end of the second reverse phase comparator；The voltage to be measured
For the level of the output end (i.e. the emitter of low speed optocoupler) of the low speed photoelectric coupled circuit.
Preferably, above-mentioned first power supply and third power supply, the 5th power supply are identical power supply, second source and the 4th power supply
For identical power supply, the first power supply is different from second source.
Further, the signal amplification output circuit further includes third current-limiting resistance；The one of the third current-limiting resistance
End is connect with the output end of the low speed photoelectric coupled circuit, one end of the third current-limiting resistance and the second reverse phase comparator
Normal phase input end connects.
Preferably, the third divider resistance, the 4th divider resistance resistance value be arranged to make the third divider resistance
The level of the other end is equal to or slightly less than the level of the output end of the low speed photoelectric coupled circuit.Electricity is divided by adjusting third
It hinders, the resistance value of the 4th divider resistance makes the inverting input level of the second reverse phase comparator be equal to or slightly less than low speed photoelectric coupled circuit
Output end voltage (i.e. the voltage of the emitter of low speed optocoupler).
The circuit of the present invention can realize that low speed optocoupler receives high speed signal.The present invention is compared using the single-point of reverse phase comparator
Principle makes circuit quickly judge high speed signal, and the time that exhausts of base stage carrier is not considered further that, is put later by signal
Big output circuit is quickly released, and is kept the rising edge of output high speed signal more precipitous, is kept signal distortion lower, the signal of output
More stablize, the present invention realizes simply, and low speed optocoupler reception high speed signal is realized by being cleverly transformed.In addition, of the invention
Cost of implementation is low, extends the application range of low speed optocoupler, simple and practical, wide market.
Embodiment of above is merely to illustrate the present invention rather than limitation of the present invention.Although with reference to embodiment to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that, to technical scheme of the present invention carry out it is various combination,
Modification or equivalent replacement, without departure from the spirit and scope of technical solution of the present invention, the right that should all cover in the present invention is wanted
It asks in range.
Claims (7)
1. a kind of low-speed optical coupler accelerating circuit, which is characterized in that the circuit includes low speed photoelectric coupled circuit, carrier release circuit
And signal amplification output circuit；
The low speed photoelectric coupled circuit is for receiving electric signal, and the on or off under the action of electric signal；
The signal amplification output circuit acquires the corresponding voltage to be measured of output voltage of the low speed photoelectric coupled circuit, and will be described
Voltage to be measured is compared with predetermined comparison voltage, if the voltage to be measured is greater than or equal to the predetermined comparison voltage, institute
Signal amplification output circuit output high level is stated, otherwise the signal amplification output circuit exports low level；
The carrier release circuit is connect with the output end of the low speed photoelectric coupled circuit, for discharging the low speed photoelectric coupled circuit
Carrier；
The carrier release circuit includes absorbing electrostatic capacitor, pull down resistor and fast wink diode；
Described one end for absorbing electrostatic capacitor is connect with the output end of the low speed photoelectric coupled circuit, described to absorb the another of electrostatic capacitor
One end is connect with one end of the pull down resistor, the other end ground connection of the pull down resistor；The anode of the fast wink diode with
One end connection for absorbing electrostatic capacitor, the minus earth of the fast wink diode；
The signal amplification output circuit includes the first divider resistance, the second divider resistance, third divider resistance, the 4th partial pressure electricity
Resistance, the first signal pull-up resistor, second signal pull-up resistor, the first reverse phase comparator, the second reverse phase comparator, second source,
Third power supply, the 4th power supply and the 5th power supply；
One end of first divider resistance is connect with the second source, the other end of first divider resistance and described the
One end of two divider resistances connects, the other end ground connection of second divider resistance；The reverse phase of the first reverse phase comparator is defeated
Enter end to connect with the other end of first divider resistance, the normal phase input end of the first reverse phase comparator and absorption electricity
The other end of charged appearance connects；The output end of the first reverse phase comparator exports the high level or low level；Described first
One end of signal pull-up resistor connects the third power supply, and the other end connection described first of the first signal pull-up resistor is anti-
The output end of phase comparator；The voltage to be measured is the level of the other end for absorbing electrostatic capacitor；
One end of the third divider resistance is connect with the 4th power supply, the other end of the third divider resistance and described the
One end of four divider resistances connects, the other end ground connection of the 4th divider resistance；The reverse phase of the second reverse phase comparator is defeated
Enter end to connect with the other end of the third divider resistance, the normal phase input end of the second reverse phase comparator and the low speed light
The output end of coupling circuit connects；The output end of the second reverse phase comparator exports the high level or low level；Described second
One end of signal pull-up resistor connects the 5th power supply, and the other end connection described second of the second signal pull-up resistor is anti-
The output end of phase comparator；The voltage to be measured is the level of the output end of the low speed photoelectric coupled circuit.
2. low-speed optical coupler accelerating circuit according to claim 1, which is characterized in that the low speed photoelectric coupled circuit includes low speed
Optocoupler, the first current-limiting resistance and the first power supply；
One end of first current-limiting resistance is connect with the collector of the low speed optocoupler, the other end of first current-limiting resistance
It is connect with first power supply.
3. low-speed optical coupler accelerating circuit according to claim 2, which is characterized in that the output end of the low speed photoelectric coupled circuit
For the emitter of the low speed optocoupler.
4. low-speed optical coupler accelerating circuit according to claim 1, which is characterized in that the signal amplification output circuit also wraps
Include the second current-limiting resistance；
One end of second current-limiting resistance with it is described absorb electrostatic capacitor the other end connect, second current-limiting resistance it is another
One end is connect with the normal phase input end of the first reverse phase comparator.
5. low-speed optical coupler accelerating circuit according to claim 4, which is characterized in that first divider resistance, second point
The resistance value of piezoresistance is arranged to that the level of the other end of first divider resistance is made to be equal to or slightly less than absorption charge electricity
The maximum level of one end of appearance.
6. low-speed optical coupler accelerating circuit according to claim 1, which is characterized in that the signal amplification output circuit also wraps
Include third current-limiting resistance；
One end of the third current-limiting resistance is connect with the output end of the low speed photoelectric coupled circuit, and the one of the third current-limiting resistance
End is connect with the normal phase input end of the second reverse phase comparator.
7. low-speed optical coupler accelerating circuit according to claim 6, which is characterized in that the third divider resistance, the 4th point
The resistance value of piezoresistance is arranged to that the level of the other end of the third divider resistance is made to be equal to or slightly less than low speed optocoupler electricity
The maximum level of the output end on road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510819681.9A CN105391441B (en) | 2015-11-23 | 2015-11-23 | Low-speed optical coupler accelerating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510819681.9A CN105391441B (en) | 2015-11-23 | 2015-11-23 | Low-speed optical coupler accelerating circuit |
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| Publication Number | Publication Date |
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| CN105391441A CN105391441A (en) | 2016-03-09 |
| CN105391441B true CN105391441B (en) | 2018-09-11 |
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| CN201510819681.9A Expired - Fee Related CN105391441B (en) | 2015-11-23 | 2015-11-23 | Low-speed optical coupler accelerating circuit |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107947782B (en) * | 2017-11-28 | 2024-05-10 | 南京优倍电气技术有限公司 | Circuit for improving transmission characteristics of optocoupler |
| CN108444099A (en) * | 2018-03-19 | 2018-08-24 | 广东海信家电有限公司 | A kind of electric heater |
| CN110260499B (en) * | 2019-06-13 | 2020-12-25 | 珠海格力电器股份有限公司 | Alternating current signal acquisition device, air conditioner and alternating current signal acquisition method of air conditioner |
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| CN201419294Y (en) * | 2009-06-09 | 2010-03-10 | 上海威特力焊接设备制造股份有限公司 | Concentrated electrifying and protection alarm circuit for multihead integrated welding machines |
| CN101860185A (en) * | 2010-06-25 | 2010-10-13 | 深圳市四方电气技术有限公司 | Frequency converter drive protecting circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5757275A (en) * | 1995-12-29 | 1998-05-26 | Siemens Energy & Automation, Inc. | Fault monitoring technique for programmable logic controllers |
| CN201419294Y (en) * | 2009-06-09 | 2010-03-10 | 上海威特力焊接设备制造股份有限公司 | Concentrated electrifying and protection alarm circuit for multihead integrated welding machines |
| CN101860185A (en) * | 2010-06-25 | 2010-10-13 | 深圳市四方电气技术有限公司 | Frequency converter drive protecting circuit |
| CN102790528A (en) * | 2011-05-16 | 2012-11-21 | 上海华建电力设备股份有限公司 | Simple electric isolated DC analog transmitting output module |
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