| 摘要 |
PROBLEM TO BE SOLVED: To facilitate miniaturization and output improvement while reducing power consumption by providing a distortion extraction loop circuit part for generating a specified distortion extracting signal and a distortion removal loop circuit part for outputting only a main signal. SOLUTION: A distortion extraction loop circuit part 10 generates the distortion extracting signal for which only a main signal component in the output of a main amplifier 15 is canceled. Namely, an amplified signal from the main amplifier 15 is supplied through a distortion extracting signal output part 16 to a main signal system, a main signal cancel signal, whose phase is inverted while keeping the same size as the main signal of the main signal system, is generated and the distortion component of the main signal outputted from the main amplifier 15 is extracted. While using the distortion extracting signal amplified by an auxiliary amplifier 25, a distortion removal loop circuit part 20 outputs only the main signal component from the signal of the main signal system on the rear step side of the main amplifier 15. Namely, while using the distortion extracting signal as a signal for which the main signal component in the output of the main amplifier 15 is canceled, the main signal component is outputted from the signal of the main signal system on the rear step side of the main amplifier 15. |
