Patent ID: 8242843

Claim:
A push-pull amplifier circuit comprising first, second, and third current paths, wherein the first current path includes a first transistor that allows a first current to flow through the first current path according to an input signal, wherein the second current path includes: a second transistor that allows a second current to flow through the second current path according to the first current, the second current having a phase opposite to a phase of the first current; a first resistor; and a third transistor that has a control terminal directly connected to the first resistor, and wherein the third current path includes: an output terminal; a fourth transistor that is connected to the output terminal and allows a current to flow through the third current path according to the input signal, the current having a same phase as the first current; and a fifth transistor that is connected to the output terminal and allows a current to flow through the third current path according to a voltage of a first node between the first resistor and the third transistor, the current having the same phase as the second current.