A Discrete Quantity Acquisition Circuit with Self-detection Function

Abstract

The invention discloses a discrete magnitude collecting circuit with a self test function. The discrete magnitude collecting circuit with the self test function is mainly composed of a bleeder circuit unit A1, a comparison circuit unit A2, a reference voltage output circuit unit A3, a reference voltage control circuit unit A4 and a protective circuit unit A5. The discrete magnitude collecting circuit with the self test function has the advantages that the discrete magnitude collecting circuit is simple in structure and capable of effectively collecting discrete signals, has the circuit self test function, is capable of quickly locating problems occurring in the circuit and has high testability and maintainability.

Description

technical field [0001] The invention relates to a discrete quantity acquisition circuit, in particular to a discrete quantity acquisition circuit with self-detection function. Background technique [0002] Discrete acquisition mainly realizes the acquisition of discrete signals such as low / open, high / open, and ground / high. In the existing discrete acquisition circuit, devices such as inverters, comparators, optocouplers, and discrete-to-digital chips are used to acquire discrete signals. Only the discrete acquisition function is realized, and the circuit has no self-test function. It cannot quickly locate the problems in the discrete quantity acquisition circuit, and the testability and maintainability are low. Contents of the invention [0003] The object of the present invention is to provide a discrete quantity acquisition circuit with a self-detection function aiming at the deficiencies in the prior art. [0004] In order to achieve the above object, the technical so...

AI Technical Summary

Problems solved by technology

It is not possible to quickly locate problems in the discrete quantity acquisition circuit, and the testability and maintainability are low

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