发明申请
- 专利标题: FM RADIO RECEIVER
- 专利标题(中): FM无线接收器
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申请号: US11761689申请日: 2007-06-12
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公开(公告)号: US20070298740A1公开(公告)日: 2007-12-27
- 发明人: Hiroshi TERAOKA , Naoki MATSUSHITA
- 申请人: Hiroshi TERAOKA , Naoki MATSUSHITA
- 申请人地址: JP Osaka
- 专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人地址: JP Osaka
- 优先权: JP2006-164348 20060614
- 主分类号: H04B1/18
- IPC分类号: H04B1/18
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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