Patent ID: 7650128
Filing Date: 2010-01-19
Classification: H03G

Abstract:
1. A radio wave reception device comprising: radio wave reception means which receives an amplitude modulation signal; gain control means which outputs gain control signals; amplitude modulation signal amplification means which amplifies the amplitude modulation signal received from said radio wave reception means, according to a first gain control signal output from said gain control means; oscillation means which outputs a signal of a predetermined frequency; frequency conversion means which mixes the signal output from said amplitude modulation signal amplification means with the signal output from said oscillation means, and outputs an intermediate frequency signal; intermediate frequency signal amplification means which amplifies the intermediate frequency signal output from said frequency conversion means, according to a second gain control signal output from said gain control means; and detection means which detects the signal output from said intermediate frequency signal amplification means, and outputs a detection signal, wherein: multiplication means which multiplies the modulation signal and the third gain control signal, and output means which outputs the signal multiplied by said multiplication means as said detection signal.