Patent ID: 7035610

Claim:
An AGC circuit comprising: a gain control circuit for controlling a gain for a reception signal from an antenna based on a gain control signal; a mixer circuit for multiplying an output signal from said gain control circuit by a prescribed local oscillation frequency signal to perform frequency conversion of said output signal; local oscillation circuits for generating local oscillation frequency signals of at least two different frequencies and supplying one of said local oscillation frequency signals to said mixer circuit; a frequency characteristic correction circuit connected to an output end of said mixer circuit for correcting a frequency characteristic of a signal path from said antenna to the output end of said mixer circuit in a prescribed frequency band including the frequency of an antenna output signal; a detection signal generation circuit for generating a detection signal representing a signal level of a signal that passed through said frequency characteristic correction circuit; and a gain control signal generation circuit for generating said gain control signal based on said detection signal and supplying said gain control signal to said gain control circuit.