Patent ID: 8260224

Claim:
A method of biasing in a power amplifier for RF communication, the method comprising: providing amplifier circuitry of the power amplifier comprising a plurality of amplification stages comprising another amplification stage, generating at least one preheat bias signal having an amplitude greater than a steady-state bias level and comprising a high amplitude pulse bias signal prior to receipt of RF signal data to be amplified by the power amplifier, providing the at least one preheat bias signal to at least one bias input port of amplifter circuitry of the power amplifier prior to receipt of RF signal data to be amplified by the power amplifier, providing the at least one preheat bias signal comprising providing a high amplitude pulse bias signal to a bias input port of a stage amplifier of an amplification stage of the plurality of amplification stages, the high amplitude pulse bias signal for causing an operating condition of the stage amplifier to approach a steady-state level of the operating condition of the stage amplifier, for causing at least one of a gain response of the stage amplifier to approach a steady-state gain response and a phase response of the stage amplifier to approach a steady-state phase response, wherein the plurality of amplification stages comprises another amplification stage comprising another stage amplifier, wherein the at least one preheat bias signal comprises another pulse bias signal, wherein providing the at least one preheat bias signal comprises providing the another pulse bias signal to a bias input port of the another stage amplifier, wherein the another pulse bias signal causes an operating condition of the another stage amplifier to approach a steady-state level of the operating condition of the another stage amplifier, wherein the stage amplifier has a higher power level than the another stage amplifier, and wherein the high amplitude pulse bias signal is at least one of: different from the another pulse bias signal; and output to the bias input port of the stage amplifier in a manner different from the manner in which the another bias pulse signal is output to the bias input port of the another stage amplifier.