Power amplifier

Details Power amplifier Power amplifier

1993-03-09

1994-10-25

Sikes, William L.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330262, 330288, 330310, 330311, 330295, H03F 318

Patent

active

053592956

ABSTRACT:
A power amplifier is provided, wherein the output of a first transistor supplied with an input signal at the base thereof is supplied to the base of a second transistor, a current proportional to a collector current of the second transistor is supplied to the emitter of the first transistor by a current mirror circuit, a third transistor is provided for outputting an emitter current in accordance with a base-to-emitter voltage of the second transistor, and emitter currents of the second and third transistors, in accordance with an emitter potential level of the first transistor, is used as an output current. This configuration allows non-linear portions in the transistor characteristics to be cancelled by each other, thereby providing a power amplifier which presents a good linearity.

REFERENCES:
patent: 4454479 (1984-06-01), Spires

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