Apparatus and method for canceling receiver input offset in distance sensing system
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United States of America Patent
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Feb 14, 2023
Grant Date -
Jul 1, 2021
app pub date -
Nov 30, 2020
filing date -
Dec 30, 2019
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Abstract
An apparatus for canceling an input offset of a receiver including a differential amplification unit and a differential comparison unit in a distance sensing system includes: an output monitoring unit selectively monitoring differential outputs of the differential comparison unit and the differential amplification unit; a current type digital-analog conversion unit connected to each of an input terminal of the differential comparison unit and the input terminal of the differential amplification unit; and a control unit controlling the current type digital-analog conversion unit to reduce a difference in differential output of the differential comparison unit according to a comparison result for the difference of the monitored differential output of the differential comparison unit and controlling the current type digital-analog conversion unit to reduce the difference in differential output of the differential amplification unit according to the comparison result for the difference of the monitored differential output of the differential amplification unit.
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