Patent ID: 8824983

Claim:
A method of biasing in a power amplifier for RF communication, the method comprising: generating a high amplitude pulse bias signal in response to an indication of an RF signal to be amplified by a multi-stage power amplifier is imminent, an amplitude and duration of the high amplitude pulse bias signal based at least in part on a first control signal, the amplitude of the high amplitude pulse bias signal being greater than a steady-state bias level; generating a standard bias signal approximately when the high amplitude pulse bias signal begins to decay; generating a smoothing bias signal, a peak amplitude and decay rate of the smoothing bias signal based at least in part on a second control signal; combining the high amplitude pulse bias signal, the standard bias signal, and the smoothing bias signal to generate a first combined bias signal; and providing the first combined bias signal to a bias input port of a final amplifying stage of the multi-stage power amplifier, the combined bias signal causing an operating condition of the final amplifying stage to approach a steady-state level.