Median-based offset cancellation circuit technique

Abstract

A simple technique to compensate for DC offsets in many analog circuits is presented. An offset-free, infinite DC gain integrator is established in a feedback loop about the uncompensated circuit, resulting in a high-pass system output response. The ideal integrator is realized via the use of a counter resulting in the cancellation of the signal's median rather than the usual case of the signal's mean.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>