Patent ID: 6833758
Filing Date: 2004-12-21
Classification: H03F

Abstract:
A power amplifier which amplifies an original signal including a plurality of signals of different frequencies, the power amplifier comprising:a signal input section for inputting the original signal; an amplifying section for amplifying the original signal input from the signal input section; a signal output section for outputting the signal amplified by the amplifying section to outside of the power amplifier; an envelope signal generating section for generating an envelope signal having components identical to envelope components included in the original signal; a distortion signal generating section for generating, based on the original signal, a distortion signal for canceling distortion components occurring while the original signal is amplified by the amplifying section; a first envelope signal injecting section for injecting the envelope signal to a signal amplifying route from the signal input section to the signal output section so as to eliminate an asymmetric characteristic of the distortion components; and a distortion signal injecting section for injecting the distortion signal to the signal amplifying route so as to suppress the distortion components.