Light sensor with dark current elimination having duo switch-capacitor circuits and a reverse capacitor
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United States of America Patent
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Jul 18, 2023
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N/A
app pub date -
Sep 23, 2022
filing date -
May 31, 2022
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Abstract
The present invention provides a light sensor with dark current elimination. A dark current from a covered photodiode and a sensed current from a photodiode are respectively transformed to a dark voltage and a sensed voltage by a controlled integration circuit. A reverse capacitor receives the dark voltage and the sensed voltage to cancel out for each other, and outputs a corrected sensing voltage.
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