Patent ID: 7933570

Claim:
A power amplifier controller circuit for controlling a power amplifier, the power amplifier coupled to receive and amplify an input signal to generate an output signal, the power amplifier controller circuit comprising: an amplitude control loop determining an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal to the power amplifier and an attenuated amplitude of the output signal of the power amplifier and adjusting a supply voltage or bias to the power amplifier based upon a supply voltage control signal derived from the amplitude correction signal, the input signal being modulated and having varying amplitude, the amplitude control loop including a variable gain amplifier adjusting the amplitude of the input signal to the power amplifier based upon a gain control signal derived from the amplitude correction signal, the gain control signal being distinct from the supply voltage control signal and adjusting a gain of the variable gain amplifier; and a phase control loop determining a phase error signal indicative of a phase difference between phases of the input signal to the power amplifier and the output signal of the power amplifier and adjusting the phase of the input signal to the power amplifier to reduce phase distortion generated by the power amplifier.