Patent ID: 7821337

Claim:
A power amplifier comprising: a distributor for distributing an input signal; an anti-phase third-order intermodulation distortion generation circuit for, upon receiving an input signal that has been distributed by said distributor, generating anti-phase third-order intermodulation distortion having a phase difference in a range from +90° to +180° or in a range of from −180° to −90° with respect to each of two main signals of different frequency that are included in said input signal and supplying said two main signals and said third-order intermodulation distortion as output; a first amplifier for amplifying a signal received from said anti-phase third-order intermodulation distortion generation circuit and supplying a result as output; a second amplifier for amplifying an input signal distributed by said distributor and supplying a result as output; a synthesizer for combining an output signal of said first amplifier and an output signal of said second amplifier; and a first amplification path and a second amplification path to which said input signal is distributed by said distributor, wherein: said anti-phase third-order intermodulation distortion generation circuit and said first amplifier are provided on said first amplification path; and said second amplifier is provided on said second amplification path wherein a plurality of said first amplification path is provided in parallel, and a plurality of said second amplification path is provided in parallel.