POWER-AMPLIFYING CIRCUIT

摘要

A power-amplifying circuit includes a pre-amplifier stage which comprises two emitter-connected transistors, one of whose bases is supplied with an input signal and an output stage comprising complementary pair of a first transistor of a PNP type and an emitter-grounded second transistor of an NPN type which carry out a class-AB push-pull operation in accordance with the amplitude of a current from the pre-amplifier stage.