Patent ID: 7078973
Filing Date: 2006-07-18
Classification: H03F

Abstract:
1. A circuit, comprising: an input node and an output node; first and second supply nodes; an input stage including a first transistor coupled between the first and second supply nodes, the first transistor having a base connected to the input node; a current booster stage including a first complementary common emitter stage and a first AB control circuit operatively coupled to the first common emitter stage, the first common emitter stage and the first AB control circuit being coupled between the first and second supply nodes, respectively; and an output stage including a second complementary common emitter stage and a second AB control circuit operatively coupled to the second common emitter stage, the second common emitter stage and the second AB-control circuit being coupled between the first and second supply nodes, respectively, the second common emitter stage including second and third transistors having respective bases and collectors, the collectors of the second and third transistors being connected to the output node, wherein the first common emitter stage includes fourth and fifth transistors having respective collectors connected to the bases of the second and third transistors, respectively, wherein the first transistor has an emitter connected to the base of at least one of the second and third transistors, and wherein the first transistor further has a collector, and further including a first current source coupled between the first supply node and the collector of the first transistor, and a second current source coupled between the second supply node and the emitter of the first transistor.