An operational amplifier and use of an operational amplifier is provided that includes an input differential amplifier, which is connected to a first input and to a second input and a differential output stage, which is connected to the input differential amplifier and a first output and a second output. 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. 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. 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. 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. The differential output stage has a constant current source, which is connected to each branch to supply a current through the branches.