CAPACITANCE SENSOR WITH SENSOR CAPACITANCE COMPENSATION
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United States of America Patent
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Issued Date -
Sep 29, 2016
app pub date -
Mar 31, 2016
filing date -
Mar 31, 2016
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Abstract
A capacitance sensing circuit may include a switching circuit configured to generate a sensor current by charging and discharging a capacitive sensor electrode, and a current mirror that generates a mirror current based on the sensor current. Based on the mirror current, a measurement circuit generates an output signal representative of a capacitance of the capacitive sensor electrode.
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