BIAS CONTROL CIRCUIT

摘要

[Problem] To suppress drop in gain with respect to a low-level high-frequency signal while mitigating distortion characteristics of an amplifier. [Solution] This bias control circuit (10) for controlling bias of an amplifier (20) for amplifying a high-frequency signal is provided with a detector (11) for detecting the envelope of the high-frequency signal, a first bias circuit (12) which supplies a uniform bias current to the amplifier (20), and a second bias circuit (14) which supplies a bias current that varies so as to conform to level variation of the envelope of the high-frequency signal.