Single pulse trigger lock/unlock logic protection circuit and its realization method

Abstract

The invention relates to the electronic circuit technology, and aims to provide a single pulse trigger locking / unlocking logic protection circuit and an implementation method. The single pulse triggerlocking / unlocking logic protection circuit comprises a signal path switch composed of a NAND gate, and a locking / unlocking logic circuit composed of four NAND gates, wherein the signal path switch isused for providing an input end and an output end of a trigger signal; the locking / unlocking logic circuit provides a path of locking signal input end and two paths of unlocking signal input ends; and each of the five NAND gates comprises three pins. The single pulse trigger locking / unlocking logic protection circuit can be kept in a certain state for a long time, or can be quickly switched between two states through logic level control, and is more flexible and convenient to use. Once the single pulse trigger locking / unlocking logic protection circuit is triggered by a signal, the same trigger signal immediately fails, and the circuit is going to be kept in the same state, thereby preventing the same kind of trigger signals from causing false triggering situation due to jitter, interference and the like. The control logic circuit is simple and reliable to implement, and the cost is low.

Description

technical field [0001] The invention belongs to electronic circuit technology, and specifically relates to a single-pulse trigger lock / unlock logic protection circuit and a realization method. Background technique [0002] Medical instruments are mainly used to diagnose and treat human diseases, and their objects are the human body with complex conditions, so medical instruments have their particularity compared with other instruments. The clinical application of commonly used diagnostic and therapeutic electronic instruments began at the beginning of the last century, and has developed greatly with the development of science and technology and electronic engineering. The diagnostic methods and levels of the medical field are also more dependent on medical electronic instruments. . The current medical instruments are becoming more and more intelligent, precise, and automated, with a wide variety and a wide range of applications. With the rapid development of computer techn...

AI Technical Summary

Problems solved by technology

In digital circuits, the triggering methods of various logic circuits are generally divided into two types: level triggering or pulse edge triggering, but either way is susceptible to false triggering by interference signals

When the logic protection circuit is used as timing control, this kind of false triggering is not allowed. Wrong timing control will cause irreversible damage to the actuator, or even wrong output

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