Amplifier having a push-pull out-put stage

Details Amplifier having a push-pull out-put stage Amplifier having a push-pull out-put stage

1991-05-01

1992-09-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330267, H03F 345, H03F 330

Patent

active

051442590

ABSTRACT:
An amplifier comprises a first transistor of first polarity type having its emitter connected to a first input terminal and its base and collector connected to a second input terminal, a second transistor of second polarity type having its base connected to the second input terminal, its collector connected to a first potential supply terminal and its emitter connected to a second potential supply terminal through a first current source, a third transistor of first polarity type having its base connected to the emitter of the second transistor, its collector connected to the second potential supply terminal and its emitter connected to an output terminal, and a fourth transistor of second polarity type having its base connected to the first input terminal, its collector connected to the first potential supply terminal and its emitter connected to the output terminal, wherein the first to fourth transistors constitute a push-pull output circuit. The push-pull output circuit may be used at the subsequent stage of a differential amplifier section.

REFERENCES:
patent: 4163908 (1979-08-01), Price
patent: 4837523 (1989-06-01), Wright
Electronique Radio Plans, No. 503, pp. 29-35, Paris, France "Structure des amplificateurs video" (Oct. 1989).
Wireless World, vol. 77, No. 1, pp. 23-26 "Elements of Linear Microcircuits" (Jan. 1971).
IEEE Journal of Solid-State Circuits, vol. SC-16, No. 4, pp. 261-266 "A High-Voltage IC for a Transformerless Trunk and Subscriber Line Interface" (Aug. 1981).

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