Control circuit for one-way switch of embedded portable device

Abstract

The invention discloses a control circuit for a one-way switch of an embedded portable device. The control circuit comprises a battery voltage comparison module, a delay module, an AND gate module, a phase inverter module and a trigger module. The control circuit is characterized in that by use of small-scale integrated circuits, a few capacitors, a few resistors and diodes, a switch circuit which has reliable performance and powerful functions and is applied to an embedded portable system is formed is formed; the control circuit comprises a power button, the voltage comparer IC1, the phase inverter module IC2, the AND gate module IC3, the trigger module IC4 and the delay module consisting of resistors R5-R7, a capacitor C1 and a diode D1; and an inverted output end pin 3 of the trigger module IC4 is connected with a pin 1 of the capacitor C1 through the diode D1 and the resistor R7, thereby forming a circuit capable of rapidly starting up after electrification and forced close-down.

Description

technical field [0001] The invention relates to the field of a switch of an electrified device, in particular to a control circuit of a single-key switch. Background technique [0002] The traditional switch circuit generally uses a mechanical hard switch, and the switch is realized by controlling the on-off of the power supply through the mechanical hard switch. Or it is composed of discrete components such as transistors, resistors and capacitors, and the switch circuit composed of mechanical hard switches is rarely used in current portable devices because the function is too simple to meet the needs of users. The switching circuit composed of discrete components has complex structure, simple function, low reliability, and high power consumption, which is difficult to meet the needs of modern users for switching circuits. Contents of the invention [0003] The present invention is a control circuit for a single-key switch of an embedded portable device. The control circ...

AI Technical Summary

Problems solved by technology

Or it is composed of discrete components such as transistors, resistors and capacitors. The switch circuit composed of mechanical hard switches is too simple to meet the needs of users, so it is rarely used in current portable devices.

The switching circuit composed of discrete components has complex structure, simple function, low reliability, and high power consumption, which is difficult to meet the needs of modern users for switching circuits.

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