SIGNAL POWER DYNAMIC RANGE COMPRESSION CIRCUIT AND POWER AMPLIFIER CIRCUIT EMPLOYING THE COMPRESSION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To compress the signal power dynamic range so as to prevent the leakage of electric power to the outside of a band. SOLUTION: In this input signal power dynamic range compression circuit, the input signals are distributed to a linear signal transmission path 21 and a compressed signal generation path 22 by a directional coupler 2. A compression signal generating circuit 4 provided on the path 22 generates a compressed signal, to set a peak-to-mean power ratio less than a prescribed level according to the distributed input signal, and a power synthesizer 6 synthesizes electric power of the compressed signal and the input signal transmitted through the path 21.