Patent ID: 8866545

Claim:
A linearity power amplification device comprising: a divider configured to receive an input signal and to divide the input signal into n first signals, wherein n>2, and wherein the first signals are the same as the input signal; a combiner; n−1 first signal paths, wherein at least one first signal path is configured to receive the first signal and to generate a first output signal comprising a first error signal, the first signal path comprising: a main invariable attenuator connected to the divider; a first power amplifier connected to the combiner; and a first attenuator and a first shifter coupled between the first power amplifier and the main invariable attenuator so as to attenuate the level and phase of the first signal and amplify an attenuated signal by the first power amplifier to generate the first output signal comprising the first error signal; a second signal path coupled between the divider and the combiner, the second signal path comprising: a main amplification circuit configured to receive and amplify the first signal and a calibration signal, and to generate a second output signal and a second signal associated with the first signal; and an error calibration circuit configured to receive the first output signal and the second signal, and to generate the calibration signal in reversed phase with the first error signal, wherein the combiner receives the first output signal and the second output signal, and generates and outputs a combiner output signal coinciding with the frequency spectrum of the input signal.