IC class AB amplifier output stage

Details IC class AB amplifier output stage IC class AB amplifier output stage

1985-04-29

1986-05-06

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330274, H03F 326

Patent

active

045874913

ABSTRACT:
A class AB monolithic silicon IC output stage is shown wherein the main output transistors are NPN structures. The current sourcing transistor is provided with an additional scaled down reference emitter and the two emitters connected to the inputs of an op amp which has its output coupled to drive the current sink transistor. The base of the current source transistor is driven from a high gain driver transistor stage which may also contain a d-c level shifter that permits the inclusion of a complementary current sink transistor that can greatly reduce cross-over distortion while conducting only quiescent current.

REFERENCES:
patent: 3974456 (1976-08-01), Russell et al.
patent: 4316149 (1982-02-01), Yamaguchi

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