Signal isolation control circuit
A control circuit and signal isolation technology, applied in the direction of logic circuits using optoelectronic equipment, logic circuits using specific components, etc., to achieve simple circuit structure and solve the effect of not working
Active Publication Date: 2014-10-15
SHANGHAI JUNYUAN COMM EQUIP
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Problems solved by technology
[0003] The purpose of the present invention is to provide a signal isolation control circuit with a simple structure in order to overcome the above-mentioned defects in the prior art and solve the problem that the entire system cannot work due to a terminal failure.
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[0012] Such as figure 1 As shown, the signal isolation control circuit includes a signal input point, a signal output point, a power supply access point, a first resistor R1, a second resistor R2, a third resistor R3, a first triode Q1, a second triode Tube Q2, terminal U1. Terminal U1 includes an optocoupler including an input terminal and an output terminal. One end of the first resistor R1 is connected to the signal input point, and the other end of the first resistor R1 is connected to the base of the first transistor Q1. The emitter of the first triode Q1 is connected to the positive pole of the power access point, and the collector of the first triode Q1 is connected in series with the second resistor R2 and the third resistor R3 in sequence and then connected to the negative pole of the power access point. The base of the second transistor Q2 is connected to the second resistor R2 and the third resistor R3, the emitter of the second transistor Q2 is connected to the n...
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The present invention relates to a signal isolation control circuit. An end of a first resistor is connected with a signal input point. The other end of the first resistor is connected with a base electrode of a first triode. An emitter of the first triode is connected with an anode of a power supply access point. A collector electrode of the first triode is orderly connected with a second resistor and a third resistor in series and then is connected with a cathode of the power supply access point. A base electrode of a second triode is connected between the second resistor and the third resistor. An emitter of the second triode is connected with the cathode of the power supply access point. A collector electrode of the second triode is connected with an input point of a terminal. Another input point of the terminal is connected with the anode of the power supply access point. Compared with the prior art, the signal isolation control circuit has a simple structure, and a condition that a whole system can not work due to a fault of a terminal is solved.
Description
technical field [0001] The invention relates to a signal control circuit, in particular to a signal isolation control circuit. Background technique [0002] In the control system, it is often encountered that one control signal needs to control many terminals. Due to the unreasonable design of the traditional control circuit, it often happens that the whole system cannot work due to the failure of a certain terminal. Therefore, the technology of realizing the isolation control of one signal to multiple terminals has emerged as the times require. Contents of the invention [0003] The object of the present invention is to provide a signal isolation control circuit with a simple structure and which solves the situation that the whole system cannot work due to a terminal failure in order to overcome the above-mentioned defects in the prior art. [0004] The purpose of the present invention can be achieved through the following technical solutions: a signal isolation control ...
Claims
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IPC IPC(8): H03K19/14
Inventor 蔡超蓝哲祥吕华江苏军
Owner SHANGHAI JUNYUAN COMM EQUIP