TRANSMISSION CIRCUIT AND COMMUNICATION DEVICE

摘要

A transmission circuit operating at a high efficiency and a low distortion is provided. A signal generation section (11) generates a vector signal and an amplitude signal. A vector modulation section (13) performs vector modulation on the vector signal. An amplification section (15) amplifies the signal processed with the vector modulation. A signal processing section (12) performs predetermined signal processing on the amplitude signal and outputs the resultant signal. A regulator (14) controls a voltage to be supplied to the amplification section (15) based on the magnitude of the signal which is output from the signal processing section (12). The signal processing section (12) determines whether or not the amplitude signal exceeds a threshold value at an interval of a predetermined time period, selects a discrete value to be output based on the determination result, and outputs a signal having the selected discrete value.