Isolated and anti-interference comparison output circuit

Abstract

The invention provides an isolated and anti-interference comparison output circuit. The circuit comprises a sensor interface J1, a first grade amplifier, a linear optical coupler integration circuit IC1, a threshold potentiometer POT2, an output triode Q2 and an output interface socket J2. An output terminal of the sensor interface J1 is connected to an input terminal of the first grade amplifier. An output terminal of the first grade amplifier is connected to an input terminal of the linear optical coupler integration circuit IC1. An output terminal of the linear optical coupler integration circuit IC1 is connected to an input terminal of the threshold potentiometer POT2 and a pin 3 of the output interface socket J2. An output terminal of the threshold potentiometer POT2 is connected to a base electrode of the output triode Q2. The circuit has advantages that a clutter signal in a signal source can be well filtered; simultaneously a signal source is amplified; through linear optical coupler isolation, common-mode interference is restrained; and after the signal source passes through a comparison circuit, a stable voltage value is acquired.

Description

technical field [0001] The invention relates to a comparison output circuit, in particular to a comparison output circuit with isolation and anti-interference. Background technique [0002] In the workplace of automation equipment, because the signal voltage collected on-site cannot be directly used by the computer, the signal collected on-site is an analog signal, such as pressure sensor, temperature sensor and other signals, which are greatly disturbed and have many stray signals. Contents of the invention [0003] In order to solve the problems in the prior art, the invention provides a comparison output circuit with isolation and anti-interference. [0004] The present invention provides a comparison output circuit with isolation and anti-interference, including a sensor interface J1, a first-stage amplifier, a linear optocoupler integrated circuit IC1, a threshold potentiometer POT2, an output transistor Q2, and an output interface socket J2, wherein the The output e...

AI Technical Summary

Problems solved by technology

[0002] In the workplace of automation equipment, because the signal voltage collected on-site cannot be directly used by the computer, the signal collected on-site is an analog signal, such as pressure sensor, temperature sensor and other signals, which are greatly disturbed and have many stray signals.

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