Push-pull current circuit for biasing CMOS amplifiers with rail-to-rail input common-mode range

摘要

A push-pull current circuit for biasing CMOS amplifiers with rail-to-rail input common-mode range is presented. By means of a feedback action, the circuit avoids the large magnitude deviations inherent to this type of amplifier and thus facilitates their optimisation and compensation. Simulated and experimental results obtained from a fabricated 2 mu m CMOS test chip are reported.