In a feed forward power amplifier, a main path amplifies a power level of an input signal to generate a path turning signal, an error path receives the input signal and controls a gain or a phase of a second order intermodulation component in the path turning {HEAD ~ signal} to generate {TAIL ~ an intermodulation compensation signal}, and a first synthesizer generates an output signal responsive to the path turning signal and the intermodulation compensation signal, achieving linearity 
In a feed forward power amplifier , a main path amplifies a power level of an input signal to generate a path turning signal , an error path receives the input signal and controls a gain or a phase of a second order intermodulation component in the path turning { HEAD ~ signal } to generate { TAIL ~ an intermodulation compensation signal } , and a first synthesizer generates an output signal responsive to the path turning signal and the intermodulation compensation signal , achieving linearity
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