A method for operating a differential amplifier, as well as circuit arrangement with a differential amplifier

摘要

Method for operating an operational amplifier (20) with first and second input channels (22, 28) connected via a resistance circuit (34) with a signal source (12) and via a second resistance (44) with a reference potential. The inputs also have a common test potential applied, with the amplifier generating an output voltage (Ua) that is adjusted by setting a resistance of the first or second resistance circuits (34, 44) to as low a value as possible. An Independent claim is made for a differential amplifier circuit with an adjustable output.