Patent ID: 8032097
Filing Date: 2011-10-04
Classification: H03F,H03G,H04B

Abstract:
1. An RF power amplifier system, comprising: an RF power amplifier configured to receive and amplify an input signal to generate an output signal circuitry configured to measure a rate of change of an amplitude of the input signal and generate a control signal indicative of the measured rate of change of the amplitude of the input signal; an amplitude control loop to determine an amplitude correction signal indicative of an amplitude difference between an amplitude of the input signal and an attenuated amplitude of the output signal, and to adjust a supply voltage or bias to the power amplifier based upon the amplitude correction signal; a loop gain adjust block configured to adjust the amplitude correction signal to generate an adjusted amplitude correction signal responsive to the control signal indicative of the measured rate of change of the amplitude of the input signal; and where the amplitude control loop is configured to reduce a gain of the amplitude control loop during rapid amplitude changes in the input signal in response to the adjusted amplitude correction signal.