Patent ID: 7031748

Claim:
A wireless signal receiving device, comprising: signal receiving means for receiving multiple received signals having different received signal frequencies; fixed frequency signal generating means for generating fixed frequency signals having fixed frequencies; standard frequency signal generating means for generating standard frequency signals for receiving having standard frequencies for receiving corresponding respectively to each of said received signals; local oscillation signal generating means for generating local oscillation signals having local oscillation frequencies equal to said received signal frequencies of said received signals from said fixed frequency signals and said standard frequency signals for receiving and to be used in common in each of said received signals; multiple demodulation means for demodulating said received signals by using said corresponding local oscillation signals; specific demodulation means for demodulating the specific received signals having the prescribed frequency band wider than the frequency band that said received signals have out of each of said received signals; and DC feedback means for applying DC feedback onto baseband signals to be obtained as a result of demodulation of said specific received signals from said specific demodulation means, wherein said standard frequency signal generating means generates local oscillation frequency signals having local oscillation frequencies equal to received signal frequencies of said specific received signals by changing optional standard frequencies for receiving out of each of said standard frequencies for receiving; and said specific demodulation means demodulates said specific received signals by using said local oscillation signals generated by said standard frequency signal generating means.