Quadrature calibration methods for sensor applications
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United States of America Patent
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Feb 13, 2024
Grant Date -
May 25, 2023
app pub date -
Nov 19, 2021
filing date -
Nov 19, 2021
priority date (Note) -
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Abstract
Apparatuses and methods of quadrature modulation and compensation are described. One touch controller includes a receiver sensing channel to measure a sense signal and generate at least four samples per one period of the sense signal. The touch controller includes quadrature demodulation logic to determine phase information of the sense signal using the at least four samples per one period of the sense signal and processing logic to execute a compensation algorithm to compensate for a phase mismatch of the touch controller based on the phase information.
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