TRANSMISSION CIRCUIT, HIGH-FREQUENCY FRONT-END CIRCUIT, TRANSMISSION SIGNAL CONTROL METHOD, AND HIGH-FREQUENCY FRONT-END TRANSMISSION/RECEPTION CONTROL METHOD

摘要

A transmission circuit (20) equipped with a transmission signal generation circuit (21), a control unit (22), and a transmission signal amplification unit (23). The transmission signal generation unit (21) generates a modulated transmission signal. The transmission signal amplification unit (23) includes power amps (231, 233) that amplify the transmission signal. The control unit (22) sets a power supply voltage signal having an amplitude characteristic with the same cycle as the envelope of the transmission signal, and supplies that power supply voltage signal to the power amp (233). The control unit (22) sets the output timing of the power supply voltage signal such that the phase difference between the phase of the envelope of the transmission signal and the phase of the power supply voltage signal does not become zero.