Offset control of an operational amplifier

摘要

An operational amplifier arrangement (OA) including an operational amplifier (A) and an input offset control circuit (IOCS) is characterized in that said operational amplifier arrangement further includes a current sensing and comparison device (CSCD) adapted to measure and to compare respective output currents on series output branches of an output stage (OS) of said operational amplifier, said current sensing and comparison device (CSCD) being coupled between said output stage (OS) of said operational amplifier and said input offset control circuit (IOCS).