Parallel path pre-distorted amplifier

摘要

A power amplifier ( 112 ) has a first non-linear power amplifier ( 202 ) for generating a first amplified signal ( 203 ) and a first pre-distortion signal ( 205 ) from the carrier signal. The first amplified signal has an amplified carrier component with non-linear distortions, while the first pre-distortion signal has an in-phase carrier component with out-of-phase non-linear distortions. A second non-linear power amplifier ( 206 ) having non-linear characteristics similar to a portion of the first non-linear power amplifier is used for generating a second pre-distortion signal ( 207 ) from the pre-distortion signal. The second pre-distortion signal has an amplified carrier component with out-of-phase non-linear distortions similar but out of phase with the non-linear distortions of the first amplified signal. A first combining point ( 210 ) is used for combining the first amplified signal and the second pre-distortion signal, thereby generating a transmission signal ( 113 ) having an amplified carrier component with diminished non-linear distortions.