Patent ID: 6424216
Filing Date: 2002-07-23
Classification: H03F,H03G

Abstract:
A power amplifier system for use in amplifying an RF input signal comprising:a signal modulator that receives and modifies said input signal and provides therefrom a modified input signal; M sub-power amplifiers connected together in parallel with each receiving and amplifying a portion of said modified input signal; a combiner that combines said amplified portions of said modified input signal to provide a combined output signal; a power detector that receives said combined output signal and provides therefrom an average output power signal representative of the average output power thereof; a controller that monitors the operation of said M sub-amplifiers to determine if any have failed and adjusts the magnitude of said output power signal to compensate for any such failure and wherein said controller controls said modulator in accordance with a function of the magnitude of said output power signal.