发明授权
- 专利标题： Noise suppressing circuit in an FM tuner
- 专利标题（中）： FM调谐器中的噪声抑制电路
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申请号： US677184申请日： 1991-03-29
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公开(公告)号： US5255319A公开(公告)日： 1993-10-19
- 发明人: Tetsuo Nakamura , Masahide Terada
- 申请人： Tetsuo Nakamura , Masahide Terada
- 申请人地址： JPX Tokyo
- 专利权人： Pioneer Electronic Corporation
- 当前专利权人： Pioneer Electronic Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-256525 19900926
- 主分类号： H04B1/10
- IPC分类号： H04B1/10 ; H04B1/16 ; H04H5/00
摘要：
A noise suppressing circuit has a gate for controlling a composite signal applied to a stereo demodulator of an FM tuner, and a detector for detecting a noise included in the composite signal and for producing a noise dependent signal for controlling the gate to close it. A pilot signal detector is provided for detecting a pilot signal included in the composite signal for producing a pilot dependent pulses. In response to the noise dependent signal and to the pilot dependent pulses, gate control pulses are applied to the gate, thereby closing the gate in synchronism with the pilot signal.
公开/授权文献
- US4592640A Stroboscopic lamp synchronizing device 公开/授权日：1986-06-03
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