POWER AMPLIFIER APPARATUS FOR THE ENVELOPE MODULATION OF A HIGH FREQUENCY SIGNAL AND A CONTROL METHOD THEREOF, PARTICULARLY FOR PERFORMING HIGHLY-EFFICIENT POWER AMPLIFICATION OPERATION IN THE CASE OF THE VARIATION IN THE BANDWIDTH OF AN INPUT SIGNAL AND/OR A PAPR

摘要

PURPOSE: A power amplifier apparatus for the envelope modulation of a high frequency signal and a control method thereof are provided to perform the highly-efficient power amplification operation for multiple modes.;CONSTITUTION: A linear amplifier(110) generates a switch control signal and a linear output signal, and a switching amplifier(120) receives the input of the switch control signal through multimode resistance. The switching amplifier generates an amplified signal, and the variable resistance value of the multimode resistance enables the determination of a switching frequency which indicates the operation speed of the switching amplifier. According to the communication mode of the input signal, the variable resistance value is adjusted.;COPYRIGHT KIPO 2011