Capacitance detection circuit and input device

A capacitance detection circuit that is capable of reducing the influence of an environmental variation such as temperature. The capacitance detection circuit detects an electrostatic capacitance of a sensor electrode. A sense pin is connected to the sensor electrode. An analog front end circuit con...

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Bibliographic Details
Main Authors Shimada, Yuji, Harumi, Go
Format Patent
LanguageEnglish
Published 31.01.2023
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:A capacitance detection circuit that is capable of reducing the influence of an environmental variation such as temperature. The capacitance detection circuit detects an electrostatic capacitance of a sensor electrode. A sense pin is connected to the sensor electrode. An analog front end circuit converts the electrostatic capacitance of the sensor electrode to an electrical signal, wherein an input-output characteristic of the analog front end circuit is variable. A controller adjusts the input-output characteristic of the analog front end circuit according to the environmental variation.
Bibliography:Application Number: US202117211204