Front-end circuit performing analog-to-digital conversion and touch processing circuit including the same
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United States of America Patent
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Oct 3, 2023
Grant Date -
N/A
app pub date -
Mar 16, 2022
filing date -
May 21, 2019
priority date (Note) -
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Abstract
A touch processing circuit includes: a front-end circuit including an amplifier, a first capacitor, a second capacitor, a third capacitor, and a plurality of switches each having two ends that are selectively connected each other, the front-end circuit being configured to process an input signal varying according to a touch; and a controller controlling the plurality of switches so that the front-end circuit is configured as a first circuit that accumulates deviation of the input signal between a first phase and a second phase during an integration period and a second circuit that converts the accumulated deviation into a digital signal during a conversion period.
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