Patent ID: 7224223

Claim:
A feed-forward power amplifier comprising: a main path configured to amplify a power level of an input signal and generate a path turning signal; and an error path in signal communication with the main path configured to receive the input signal and control at least one of a gain and a phase of a second order intermodulation component from the path turning signal to generate an intermodulation compensation signal; and a first synthesizer in signal communication with the main path and the error path configured to generate an output signal responsive to the intermodulation compensation signal, wherein the error path includes: a first sub-path configured to extract the second order intermodulation component from the path tuning signal of the main path; a second sub-path configured to transmit the input signal; a second synthesizer configured to synthesize the second order intermodulation component of the first sub-path and the input signal of the second sub-path so as to generate a synthesizing signal; and a third sub-path configured to generate the intermodulation compensation signal having a third order intermodulation component based on the synthesizing signal.