发明名称 |
Method and apparatus for providing a squelch function on narrow band radio receivers |
摘要 |
<p>Squelch circuitry for narrow band audio receivers which uses a sub-audible tone to modulate the intermediate frequency in accordance with the presence of a desired broadcast signal and then detects the sub-audible tone frequency in the modulated IF frequency to control the audio output ofthe receiver to an off condition when there is excessive noise. <IMAGE></p> |
申请公布号 |
EP0917286(A2) |
申请公布日期 |
1999.05.19 |
申请号 |
EP19980120766 |
申请日期 |
1998.11.02 |
申请人 |
HONEYWELL INC. |
发明人 |
DOYLE, ROBERT S.;KOLBER, MARK A. |
分类号 |
H03G3/00;H03G3/34;(IPC1-7):H03G3/34 |
主分类号 |
H03G3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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