阅读说明：本技术 一种信号速率放大隔离传输电路 (A kind of signal rate Amplification and insulation transmission circuit ) 是由 张金亮 于 2019-07-16 设计创作，主要内容包括：本发明属于信号隔离电路技术领域,具体涉及一种信号速率放大隔离传输电路,主体结构包括电阻R1、R2和R3、光耦U1以及三极管Q1,输入信号input输出低电平时,电阻R1对光耦U1的正极进行限流限流,光耦U1导通,光耦U1的发射极导通,电阻R2对输出信号output进行限流,三极管Q1的发射极为低电平,光耦U1的发射极与地平面压差大于等于0.7V时,三极管Q1导通,三极Q1的集电极与发射极导通,输出信号output输出为低电平；输入信号input输出高电平时,光耦U1不导通,三极管Q1截止,光耦U1的发射极有残余电源,电阻R4释放残余电源；其原理科学,用于不同电路的隔离或较远距离信号的传输。(The invention belongs to signal isolation circuit technical fields, more particularly to a kind of signal rate Amplification and insulation transmission circuit, main structure includes resistance R1, R2 and R3, optocoupler U1 and triode Q1, when input signal input exports low level, resistance R1 carries out current limliting current limliting to the anode of optocoupler U1, optocoupler U1 conducting, the emitter of optocoupler U1 is connected, resistance R2 carries out current limliting to output signal output, the transmitting of triode Q1 extremely low level, when the emitter and ground level pressure difference of optocoupler U1 are more than or equal to 0.7V, triode Q1 conducting, the collector of three pole Q1 is connected with emitter, output signal output output is low level；When input signal input exports high level, optocoupler U1 is not turned on, and triode Q1 cut-off, the emitter of optocoupler U1 has remaining mains, and resistance R4 discharges remaining mains；Its scientific in principle, the isolation for different circuits or the transmission compared with distant signal.)

1. a kind of signal rate Amplification and insulation transmission circuit, it is characterised in that main structure includes resistance R1, R2 and R3, optocoupler U1 And triode Q1；Resistance R1, input signal input, resistance R2, resistance R3 and resistance R4 are connect with optocoupler U1 respectively, resistance R2 is connect with output signal output, and resistance R3 and resistance R4 are connect with triode Q1 respectively, and resistance R2 is connect with triode Q1, Resistance R4 and triode Q1 are connected with ground wire.

2. signal rate Amplification and insulation transmission circuit according to claim 1, it is characterised in that power supply DVDD is optocoupler U1 Positive driving power；The working condition of input signal input control optocoupler U1；The height electricity of power supply DVCC control output electronics Ordinary mail number；Resistance R1, resistance R2 and resistance R3 are current-limiting resistance；Resistance R4 is release resistance, and optocoupler U1 passes through isolation 4KV exchange Pressure test has protective effect.

3. signal rate Amplification and insulation transmission circuit according to claim 1 to 2, it is characterised in that in use process, input When signal input exports low level, resistance R1 carries out current limliting current limliting, optocoupler U1 conducting, the hair of optocoupler U1 to the anode of optocoupler U1 Emitter-base bandgap grading conducting, resistance R2 carry out current limliting, the transmitting of triode Q1 extremely low level, the transmitting of optocoupler U1 to output signal output When pole and ground level pressure difference are more than or equal to 0.7V, triode Q1 conducting, the collector of three pole Q1 is connected with emitter, output signal Output output is low level；When input signal input exports high level, optocoupler U1 is not turned on, triode Q1 cut-off, optocoupler U1 Emitter have a remaining mains, resistance R4 discharges remaining mains, protects circuit.

Technical field:

The invention belongs to signal isolation circuit technical fields, and in particular to a kind of signal rate Amplification and insulation transmission circuit, Isolation for different circuits or the transmission compared with distant signal.

Background technique:

The mode that traditional electronic signal transmission uses PCB trace direct-connected, in the case where room temperature and closer distance, electricity The transmission of subsignal will not be problematic, but high and low temperature or at a distance under the influence of optocoupler transfer ratio have biggish change Change, electronic signal will appear rate attenuation and signal receives bad phenomenon；Under external influence factors, anti-external influence factors Ability is weaker, will lead to data corruption in data transmission procedure, influences normal signal transmission.Enhance signal by secondary circuit The rate intensity of transmission when so that signal being received again, does not generate distortion, does not influence the normal transmitting-receiving of data, while can be into One step enhances higher communication signal rate requirement.Such as: Chinese patent 201821257195.8 is disclosed to be used for signal isolation The circuit of transmission includes transformer T1, capacitor C1, voltage-stabiliser tube D1, first resistor R1, second resistance R2,3rd resistor R3, first Switch S1, second switch S2, third switch S3, the 4th switch S4, the 5th switch S5 and switching tube Q1, the first resistor R1's One termination VCC level, the other end of the first resistor R1 are connect with the collector of the switching tube Q1, the switching tube Q1's Base stage is connect with one end of second resistance R2, and the emitter of the switching tube Q1 is grounded with the other end of second resistance R2, institute State third switch S3, one end of the 4th switch S4 is connect with one end of second resistance R2, the other end of the third switch S3 It is connect with one end of first switch S1, one end of the 4th switch S4 is connect with one end of second switch S2, and described first opens The other end of the other end and second switch S2 that close S1 is all connected with VDD level, and the both ends of the transformer T1 primary side are respectively with the One end of one switch S1 is connected with one end of second switch S2, and one end of the capacitor C1 is connect with the one end the voltage-stabiliser tube D1, The both ends on the transformer T1 pair side are connect with the other end of the voltage-stabiliser tube D1 other end and the capacitor C1 respectively, and described It is jointly in parallel with the capacitor C1 after three resistance R3 and the 5th switch S5 series connection, the other end ground connection of the capacitor C1；It is Chinese special A kind of signal circuit disclosed in benefit 201820868361.1 includes multichannel switching switch, TV master chip and first resistor； The multichannel switching switch is single supply power supply chip, and multiple input terminals of the multichannel switching switch are for being separately connected Multiple signal sources, the multiple signal source include alternating message source；The output end of the multichannel switching switch connects the TV The signal source connection of master chip；The signal source connection of the TV master chip connects one end of the first resistor, and described The other end of one resistance connects DC power supply；Only at this between the input terminal and the DC power supply of the multichannel switching switch There is connection path when input terminal is connected with output end；A kind of signal circuit disclosed in Chinese patent 201710601544.7 It include: common interface, first switch, second switch and anti-interference branch；Wherein, the common interface, for described first When closing the switch, digital signal is received by the first switch；Or in second switch closure, pass through described second Switch receives analog signal；The anti-interference branch, for eliminating interference of the second switch to digital signal；It is described anti-dry The signal input part for disturbing branch, for receiving the digital signal, the signal output end connection of the anti-interference branch described the The signal input part of one switch；And/or the signal input part of the anti-interference branch connects the signal output of the second switch End, the signal output end of the anti-interference branch connect the signal input part of the common interface；Chinese patent The 201810885767.5 disclosed circuits for signal-isolated transmission include transformer T1, capacitor C1, voltage-stabiliser tube D1, the first electricity Resistance R1, second resistance R2,3rd resistor R3, first switch S1, second switch S2, third switch S3, the 4th switch S4, the 5th open Close a termination VCC level of S5 and switching tube Q1, the first resistor R1, the other end and the switch of the first resistor R1 The collector of pipe Q1 connects, and the base stage of the switching tube Q1 is connect with one end of second resistance R2, the transmitting of the switching tube Q1 Pole and the other end of second resistance R2 are grounded, the third switch S3, the 4th switch S4 one end with second resistance R2's One end connection, the other end of the third switch S3 connect with one end of first switch S1, one end of the 4th switch S4 and One end of second switch S2 connects, and the other end of the first switch S1 and the other end of second switch S2 are all connected with VDD level, The both ends of the transformer T1 primary side are connect with one end of one end of first switch S1 and second switch S2 respectively, the capacitor C1 One end connect with the one end the voltage-stabiliser tube D1, the both ends on the transformer T1 pair side respectively with the voltage-stabiliser tube D1 other end and It is jointly in parallel with the capacitor C1 after the other end connection of the capacitor C1, the 3rd resistor R3 and the 5th switch S5 series connection, The other end of the capacitor C1 is grounded；A kind of signal circuit disclosed in Chinese patent 201680072283.8 is first by insulation Part transmits the signal for indicating provisioning information between the sending device and reception device by insulation, the sending device packet Include: the first transmission unit, first transmission unit send the first signal that the first information is indicated by the number of pulse, the arteries and veins Punching is continuously exported with the defined period, has the first waveform relative to the duty ratio in the period less than 100%；And second Transmission unit, second transmission unit send the second letter that the second information is indicated by the wavelength pulse longer than the first waveform Number, by the shared insulation component, first transmission unit sends first signal to the reception device, and described the Two transmission units send the second signal to the reception device.

Summary of the invention:

It is an object of the invention to overcome defect of the existing technology, a kind of signal rate Amplification and insulation transmission electricity is researched and developed Road solves the problems, such as that electrical isolation signal generation rate waveform attenuating in transmission process is distorted.

To achieve the goals above, signal rate Amplification and insulation transmission circuit main structure of the present invention includes resistance R1, R2 and R3, optocoupler U1 and triode Q1；Resistance R1, input signal input, resistance R2, resistance R3 and resistance R4 respectively with Optocoupler U1 connection, resistance R2 are connect with output signal output, and resistance R3 and resistance R4 are connect with triode Q1 respectively, resistance R2 It is connect with triode Q1, resistance R4 and triode Q1 are connected with ground wire.

Compared with prior art, the present invention input signal input export low level when, resistance R1 to optocoupler U1 anode into Row current limliting current limliting, optocoupler U1 conducting, the emitter conducting of optocoupler U1, resistance R2 carry out current limliting, three poles to output signal output The transmitting of pipe Q1 extremely low level, when the emitter and ground level pressure difference of optocoupler U1 are more than or equal to 0.7V, triode Q1 conducting, three The collector of pole Q1 is connected with emitter, and output signal output output is low level；Input signal input exports high level When, optocoupler U1 is not turned on, triode Q1 cut-off, and the emitter of optocoupler U1 has remaining mains, and resistance R4 discharges remaining mains, protection Circuit；Its structure is simple, scientific in principle, is able to solve electrical isolation signal generation rate waveform attenuating in transmission process and is distorted The problem of, the isolation for different circuits or the transmission compared with distant signal.

Detailed description of the invention:

Fig. 1 is main structure schematic illustration of the invention.

Specific embodiment:

Invention is further described in detail with reference to the accompanying drawing and by embodiment.