Zero crossing detector

Posted on Jun 2, 2012

This detector is useful in sine wave squaring circuits and A/D converters. The positive input may either be grounded or con-output nected a nulling voltage which cancels input offsets and enables accuracy to within microvolts of ground

Zero crossing detector
Click here to download the full size of the above Circuit.

The CMOS output will switch to within a few millivolts of either rail for an input voltage change of less than 200 µV.

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