Patent ID: 7535300

Claim:
An operational amplifier, comprising: a first input; a second input; an input differential amplifier, which is operatively connected to the first input and to the second input; a first output; a second output; and a differential output stage, which is operatively connected to the input differential amplifier and the first output and the second output, wherein the differential output stage has a first branch with two first transistors, whose drain and/or collector are connected to one another and to the first output, wherein the differential output stage has a second branch with two second transistors, whose drain and/or collector are connected to one another and to the second output, wherein the first gates and/or the first bases of the two first transistors in the first branch are connected to one another and to a first output of the input differential amplifier, wherein the second gates and/or the second bases of the two second transistors in the second branch are connected to one another and to a second output of the input differential amplifier, and wherein the differential output stage has a constant current source, which is connected to each branch to supply a current through the branches.