Capacitance detection circuit, chip, method and electronic equipment

The invention provides a capacitance detection circuit and method, a chip and electronic equipment, the capacitance detection circuit comprises a capacitance acquisition module, a switch module and a target acquisition port, and the capacitance acquisition module is electrically connected with the t...

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Bibliographic Details
Main Author YANG ZHIJUAN
Format Patent
LanguageChinese
English
Published 21.03.2023
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention provides a capacitance detection circuit and method, a chip and electronic equipment, the capacitance detection circuit comprises a capacitance acquisition module, a switch module and a target acquisition port, and the capacitance acquisition module is electrically connected with the target acquisition port through the switch module. A first capacitive sensing signal and a second capacitive sensing signal corresponding to a target acquisition port are obtained, the first capacitive sensing signal is a signal when the switch module is switched on, and the second capacitive sensing signal is a signal when the switch module is switched off; and the capacitance acquisition module also determines a target capacitance induction value according to the first capacitance induction signal and the second capacitance induction signal in a preset mode. Therefore, only one signal acquisition port is used for detecting the capacitance induction value of the single target detection port for avoiding temperature
Bibliography:Application Number: CN202211603960