Arrangement for cancelling the input bias current, at picoampere levels, in an integrated circuit

摘要

An arrangement for cancelling the input bias current, at picoampere levels, in linear integrated circuits such as operational amplifiers, comparators, and the like is disclosed herein. This arrangement utilizes circuitry including a tracking transistor which is virtually independent of the presence or absence of leakage current in the overall integrated circuit, even at relatively high temperatures, for example 125 DEG C., where leakage current can be most significant.