Method and apparatus for low power offset correction of...

Details Method and apparatus for low power offset correction of... Method and apparatus for low power offset correction of...

G - Physics

01

R

340/76

G01R 1/02 (2006.01) G01R 1/44 (2006.01) H03F 1/30 (2006.01)

Patent

CA 1332189

Abstract of the Disclosure A sensor is periodically energized and the sensor output is amplified, the amplified signal being applied to to sample-and-hold circuits which are alternately activated in response to the sensor drive, one being activated only when the sensor is energized and the other being activated when the sensor is not energized. One of the samples is subtracted from the other in a summer for cancelling the amplifier offset. The summer output may be buffered, and there is also applied to the summer an offset correction signal for cancelling sensor offset and buffer offset inaccuracies.

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