Patent ID: 6525605
Filing Date: 2003-02-25
Classification: H03F,H03G

Abstract:
A power amplifier system for use in amplifying an RF input signal exhibiting a given operating frequency within a known range of frequencies and comprising:a signal modulator that receives and modifies said input signal and provides therefrom a modified first signal; a power amplifier that receives and amplifies said modified first signal; a first power detector that detects said input signal and provides therefrom an average input power signal representative of the average input power thereof, and a second power detector connected to the output of said amplifier for providing an output average power signal representative of the average output power thereof; a controller that adjusts the magnitude of said average input power signal and the magnitude of said average output power signal as a function of the frequency level of said operating frequency to produce an adjusted input average power signal and an adjusted output average power signal; and, said controller includes a comparator that compares said adjusted input average power signal and said adjusted output average power signal and controls said modulator in accordance therewith.