Dual current mirror power amplifier bias control

摘要: A mobile station ( 10 ) is constructed to include transmitter circuitry 20 and an antenna 24 for transmitting a signal. The includes multistage power amplifier 1 having first stage A) with output coupled input of second B). the antenna. further source variable bias current 3 that controlling gain thereof, fixed C), summing junction E) thereof. controlled such minimum desired achieved without inducing collapse in stage. may circuit block D) series selectively turning off current.