High-speed low-power-consumption capacitive touch detection circuit, method and chip

A technology of capacitive touch and detection circuit, applied in capacitance measurement, measurement of resistance/reactance/impedance, electronic switches, etc., can solve the problems of increasing chip cost and power consumption, small touch difference, and high chip power consumption, so as to improve detection Speed ​​and detection accuracy, and the effect of reducing detection power consumption
CN114465613APending Publication Date: 2022-05-10深圳市敏锐微电子有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市敏锐微电子有限公司
Publication Date
2022-05-10

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Abstract

The invention discloses a high-speed low-power-consumption capacitive touch detection circuit, method and chip, the circuit comprises a touch module and a successive approximation module, the touch module comprises a charging power supply module and a comparison trigger module, the charging power supply module is connected with the input side of the comparison trigger module and an external touch PAD, and the comparison trigger module is connected with the external touch PAD. And the output side of the comparison trigger module is connected with the successive approximation module. Capacitive touch detection is carried out in a successive approximation mode, the detection speed and the detection precision are improved, the detection power consumption is reduced, meanwhile, rapid multi-channel and multi-time detection is achieved, touch intensity detection can be carried out by configuring different touch threshold values, and the touch sliding detection function is further achieved.
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Description

technical field

[0001] The invention relates to the technical field of integrated circuits, in particular to a high-speed and low-power capacitive touch detection circuit, method and chip. Background technique

[0002] Button is the simplest, direct and fast method of human-computer interaction. At present, mechanical buttons are commonly used, but the mechanical buttons have the problems of short service life and slow speed. With the development of electronic technology, technicians have been looking for substitutes for mechanical buttons.

[0003] Because the touch button has the advantages of simplicity and exquisiteness, which makes the product look more fashionable and is easier to win the favor of today's customers, so more and more products use touch buttons instead of mechanical buttons. Capacitive touch has the advantages of sensitive response, low cost, and strong anti-interference, and its technology is becoming more and more mature. Its application has become ve...

Claims

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