Pulse signal processing circuit and power supply circuit

Abstract

A pulse signal processing circuit includes an input control circuit, an optocoupler circuit and an output circuit, which are sequentially connected, wherein the input control circuit comprises a firstswitch tube,a second switch tube and a first resistor, the output terminals of the first switch tube and the second switch tube are grounded through the first resistor, the control terminal of the first switch tube is used as an input terminal for accessing the input pulse signal, the control terminal of the second switch tube is connected with a reference voltage, and the on-off of the optical coupling circuit is controlled by the on-off of the second switch tube; The output circuit includes a second resistor, one end of the second resistor serves as an output end of the output circuit, andthe other end of the second resistor is connected to both the second power supply unit and the optical coupling circuit and is grounded through the optical coupling circuit. By setting the reference voltage, the noise in the input pulse signal can be suppressed, so that the output of the circuit is not affected by the noise, so that the stable and noise-free pulse signal can be output.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a pulse signal processing circuit and a power supply circuit. Background technique [0002] In electronic equipment or electronic systems, there are usually unwanted signals other than useful signals, that is, noise, which will interfere with useful signals, and the final signal obtained after system processing is the superposition of useful signals and noise. Especially when there is an operational amplifier in the system, small noise will be amplified, affecting the accuracy of the signal, and even causing signal distortion, more glitches, and difficulty in identifying useful signals. Moreover, most power supplies will generate noise and ripple when they are connected to the system. Without noise reduction processing, it is difficult to obtain ideal output results. At present, capacitors and inductors are usually used for filtering, and capacitors or inductors with different p...

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Problems solved by technology

[0003] Based on this, it is necessary to propose a new pulse signal processing circuit and power supply circuit for the problems in the prior art that the effect of filtering the power supply by using capacitors and inductors is not obvious and the versatility of the filter circuit is poor.

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