Switching circuit with zero standby power consumption

Abstract

The invention discloses a switching circuit with zero standby power consumption. The switching circuit comprises an on / off state locking circuit, a standby keystroke and a state reversing circuit; the output end of the on / off state locking circuit is coupled to the input end of the state reversing circuit; when the on / off state locking circuit is in an off state, the state reversing circuit outputs a level open signal at the moment of connecting the standby keystroke and delays until the pressing is finished to produce a level close signal; the on / off state locking circuit is triggered by thelevel open signal to enter an open state and be locked into a stable state; when the on / off state locking circuit is in an open state, the state reversing circuit outputs the level close signal when the standby keystroke is connected and delays until the pressing is finished to produce the level open signal; and the on / off state locking circuit is triggered by the level close signal to enter the close state and be locked into a stable state. The switching circuit can be used for realizing standby with single keystroke and zero power consumption.

Description

technical field [0001] The invention relates to battery-powered equipment, in particular to a switching circuit with zero standby power consumption. Background technique [0002] In common home appliances and devices, the standby button is usually processed by MCU (Micro Control Unit). In order to meet the requirements of low power consumption, most of the MCU will enter sleep or stop mode. The current of uA, the current of this value will still increase the power consumption of the circuit, especially the power consumption of the battery-powered system. [0003] If it is required to achieve zero power consumption, it can usually only be achieved by connecting a power switch in series in the power supply circuit and turning the circuit on or off through the power switch. However, in many applications, the size, life, and functional requirements of such switches and There are many restrictions on how to use it. Contents of the invention [0004] The main purpose of the pr...

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Problems solved by technology

[0002] The standby buttons of common home appliances and equipment are usually processed by MCU (Micro Control Unit). In order to meet the requirements of low power consumption, most of the MCU will enter sleep or stop mode. The current of uA, the current of this value will still increase the power consumption of the circuit, especially the power consumption of the battery-powered system

[0003] If it is required to achieve zero power consumption, it can usually only be achieved by connecting a power switch in series in the power supply circuit and turning the circuit on or off through the power switch. However, in many applications, the size, life, and functional requirements of such switches and There are many restrictions on how to use

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