Active bias for radio frequency power amplifier

Details Active bias for radio frequency power amplifier Active bias for radio frequency power amplifier

1994-08-26

1996-10-29

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

330279, 330289, 330298, H23F 130

Patent

active

055700659

ABSTRACT:
A transceiver (100) includes a radio frequency power amplifier (116) which is biased by an active bias circuit (110). Active bias circuit (110) provides a low cost bias circuit for amplifier (116) which adjusts the bias over changes in temperature and supply voltage levels to provide a constant output power. A set of control inputs (122-126) coming from controller (108) provide for power output level adjustment for the amplifier (116) in a frequency modulated (FM) environment and for both power and modulation level adjustments in an amplitude modulated (AM) environment.

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patent: 5278997 (1994-01-01), Martin

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