发明申请
US20070298740A1 FM RADIO RECEIVER 审中-公开
FM无线接收器

FM RADIO RECEIVER
摘要:
An FM radio receiver includes an antenna. A high frequency signal received by the antenna ranges from an FM radio broadcast band to a television broadcast band assigned to higher frequencies. An LPF has an attenuated area corresponding to a television channel at a frequency higher out of two television channels causing intermodulation interference with the FM radio broadcast band. A part of the frequency component constituting the high frequency signal received by the antenna is extracted by the LPF. A mixer mixes a high frequency signal having the frequency component extracted by the LPF with a local oscillation frequency signal to thereby output an intermediate frequency signal. A demodulator circuit creates an audio signal for an FM radio broadcast on the basis of the intermediate frequency signal output from the mixer.
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