Patent ID: 7443238

Claim:
An amplifier stage, comprising: a first and a second signal path, each comprising a series connection of a first transistor of a first conduction type which comprises a control input configured to receive an input signal to the amplifier stage and a second transistor of a second conduction type, the first and the second signal paths each being connected between a supply voltage tap and a reference voltage tap; a first and a second signal output formed at a respective connection node of the respective first and second transistors in the first and second paths, respectively; a third transistor of the second conduction type connected to the respective second transistor as a current mirror in each of the first and second paths; a fourth transistor of the first conduction type connected to the respective first transistor as a current mirror and configured to control the third transistor of the other signal path respectively in each of the first and second paths; and a current source connected in parallel to one of the respective first, second, third and fourth transistors in each of the first and second paths, wherein for each of the first and second signal paths the transistors are dimensioned such that a current through the respective first transistor is larger than a current through the respective fourth transistor by a first factor.