Patent ID: 7539466

Claim:
A radio frequency amplifier module, comprising: a voltage monitor that monitors an input supply voltage of an input power supply; an adjustable attenuator that attenuates an input signal used to produce a radio frequency signal, the radio frequency signal having a time varying power envelope; an adjustable power supply that produces, from the input power supply, an adjustable power supply output that has a controllable voltage; an amplifier, supplied by the adjustable power supply output, that linearly amplifies a radio frequency signal, the amplifier producing an amplified radio frequency signal having an output power level; and an output controller, communicatively coupled to the voltage monitor, the adjustable attenuator, and the adjustable power supply, wherein the output controller determines, based on a level of the input supply voltage, a reduced power level that is a difference between a desired radio frequency output power level and a power cutback level, the power cutback level being based upon the level of the input supply voltage, and adjusts, in response to the level of the input supply voltage, the output power level of the amplified radio frequency signal to the reduced power level by adjusting the adjustable attenuator and by adjusting the controllable voltage of the adjustable power supply output to an adjusted voltage so as to cause the amplifier to linearly operate at the reduced power level that is substantially at a pre-determined output power compression level.