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Self-locking circuit and control method

A self-locking circuit and resistance technology, applied in electrical components, electronic switches, pulse technology, etc., can solve the problems of clearing, unsuitable application requirements, etc.

Pending Publication Date: 2019-04-05
SENSOR ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The state of the existing self-locking circuit can only be unlocked by cutting off the power supply, but the unlocking state will be cleared when the power is off, which is not suitable for some application requirements that cannot be unlocked by power off

Method used

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  • Self-locking circuit and control method

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Embodiment Construction

[0023] In order to make the implementation, technical solutions and advantages of this specification clearer, a solution of this specification will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments in this specification, but not all of them. The protection scope of the technical solution shall be determined by the claims.

[0024] Such as figure 1 Shown is the principle diagram of the self-locking circuit of the present invention.

[0025] A self-locking circuit, comprising: a first signal input terminal IN1, a voltage input terminal Vcc, a signal output terminal OUT, a second signal input terminal IN2, a first resistor R1, a second resistor R2, a PNP transistor Q1, and an NPN transistor Q2, regulator tube ZD;

[0026] The first signal input terminal IN1 is connected between the first resistor R1 and the c-pole of the NPN transistor Q2, and the other end of the first res...

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Abstract

The invention discloses a self-locking circuit, which comprises a first signal input terminal, a voltage input terminal, a signal output terminal, a second signal input terminal, a first resistor, a second resistor, a PNP triode, an NPN triode and a voltage-regulator tube. Signals are triggered through the first signal input terminal to conduct the PNP triode, the NPN triode is further conducted to enable the first signal input terminal to be parallelly grounded, and the state of the signal output end is thus kept. Signals are triggered through the second signal input terminal to lower the voltage of the negative electrode of the voltage-regulator tube, the second resistor and the PNP triode are thus disconnected, the NPN triode is thus disconnected, and keeping of the state of the signaloutput end fails. In the scheme, self locking can be realized to enable the state of the output end to be kept, state keeping can also be unlocked, and the self-locking circuit is applicable to a situation in which state keeping is needed but unlocking can not be performed in a power cutoff mode.

Description

technical field [0001] The invention relates to the technical field of instantaneous signal state maintenance, in particular to a self-locking circuit and a control method. Background technique [0002] The state of the existing self-locking circuit can only be unlocked by cutting off the power supply, but the unlocked state will be cleared when the power is off, which is not suitable for some application requirements that cannot be unlocked by power off. Contents of the invention [0003] In order to solve the above-mentioned problems, the present invention has been proposed. [0004] According to a first aspect of the present invention, a self-locking circuit is provided. [0005] A self-locking circuit, comprising: a first signal input terminal, a voltage input terminal, a signal output terminal, a second signal input terminal, a first resistor, a second resistor, a PNP transistor, an NPN transistor, and a voltage regulator; [0006] The first signal input terminal is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/567
CPCH03K17/567
Inventor 万信超方斌原
Owner SENSOR ELECTRONICS CO LTD
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