POWER AMPLIFIER SYSTEM HAVING FREQUENCY AND AMPLIFIER FAILURE COMPENSATION

摘要

A power amplifier system for use in amplifying an RF input signal exhibiting a given operating frequency within a known rage of frequencies. The system includes a signal modulator that receives and modifies the input signal and provides therefrom a modified first signal. A power amplifier receives and amplifies the modified first signal. A first power detector detects the input signal and provides therefrom an average input power signal representative of the average input power thereof. A second power detector connected to the output of the amplifier provides an output average power signal representative of the average output powere thereof. A controller adjusts the magnitude of said average input power signal as a function of the frequency level of the operating frequency. The controller includes a comparator that compares the adjusted said input average power signal and said adjusted putput average power signal and controls said modulator in accordance therewith. Also, the amplifier includes a plurality of sub-amplifiers that are monitored for failure and adjustments are made to the average output power signal as needed.