Patent ID: 6933784

Claim:
A class-AB output stage for an operational amplifier, comprising: first and second differential input signal lines; a first pair of complementary output transistors; a current mirror including first and second current sources; a first biased class-AB control circuit including a first pair of complementary control transistors, the first control circuit being connected in series between the first differential signal line and the first current source; a second biased class-AB control circuit including a second pair of complementary control transistors, the second control circuit being connected in series between the second differential signal line and the second current source; and a pair of differential amplifiers, each differential amplifier having first and second inputs and a current output, the respective outputs of the differential amplifiers being connected to a feedback signal line, the first inputs of the differential amplifiers being connected to respective gates of the first output transistors, wherein the first control circuit is connected between the respective first inputs of the differential amplifiers and the second control circuit is connected between the respective second inputs of the differential amplifiers, and wherein the feedback signal line is connected to the current mirror for reducing output conductance associated with the current mirror.