In a feed forward power amplifier, a main path amplifies a power level of an input signal to generate {TAIL ~ 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 signal to generate an intermodulation compensation signal, and a first synthesizer generates {HEAD ~ 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 { TAIL ~ 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 signal to generate an intermodulation compensation signal , and a first synthesizer generates { HEAD ~ an output signal } responsive to the path turning signal and the intermodulation compensation signal , achieving linearity
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