Power amplifying circuit

Details Power amplifying circuit Power amplifying circuit

1990-07-18

1991-10-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

330297, H03F 304

Patent

active

050537202

ABSTRACT:
A power amplifying circuit comprises multi-stage amplifiers connected in cascade, a first switching circuit connected to the last stage amplifier, a second switching circuit connected to the amplifiers other than the last stage amplifier, and an output power adjusting circuit connected to the switching circuit, for controlling a bias voltage. The bias voltage of the last stage amplifier and the bias voltages of the other stage amplifiers are controlled separately from each other by the first and second switching circuits, respectively.

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