Microampere stage ultra-low power consumption finger-simulated inductive switch circuit

Abstract

The invention relates to an induction switching circuit, in particular to a microampere level super lower power-consumption simulated finger induction switching circuit which comprises a single-tube oscillating unit, a rectifying unit and a voltage comparing unit, wherein, the oscillating unit generates oscillation waves and outputs DC voltage through rectification by the rectifying unit, and then outputs a judging signal after the DC voltage is compared with the voltage of the voltage comparing unit. By changing LC oscillation form from the original capacitive feedback mode into capacitor three-point type, oscillation starting is easier and the oscillation is stable, a resistance with large resistance value is used at the emitter instead, and a base electrode is regulated to be offset, therefore, low power consumption is realized.

Description

technical field [0001] The invention relates to an inductive switch circuit, in particular to a microampere ultra-low power consumption analog finger inductive switch circuit. Background technique [0002] As an induction switch, it has been around for a long time, and there are many varieties, including photoelectric, electromagnetic, force-sensitive, etc., contact type, induction type, frequency change caused by induction, and oscillation caused by induction. There are also those that are sensitive to AC electric fields...but for a battery-powered electronic device or instrument that requires several years of use, there is a problem of too much power consumption. Most of those switches require several milliamps or tens of milliamperes of operating current. [0003] In recent years, with the development of computer technology, touch chip ICs such as ATA2508 of ATLAB Company have appeared. The performance is very good, but when the power consumption is low, it still needs 6...

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the development of computer technology, touch chip ICs such as ATA2508 of ATLAB Company have appeared.

[0004] Recently, there is also a capacitive sensing switch. After adding induction, the change of its frequency is measured with a single-chip microcomputer. The analog circuit and the programming of the single-chip microcomputer are both troublesome and costly.

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