发明名称 |
Phase locked loop carrier recovery circuit with false lock prevention |
摘要 |
A carrier recovery apparatus for phase modulated waves including phase-locked loops is operable to prevent false locks. The apparatus includes a clock recovery circuit which generates a signal in response to a modulated carrier, a first phase comparator responsive to the modulated carrier and the output of a VCO, a second phase comparator responsive to the first phase comparator and the clock signal, and a control device for superimposing the low frequency component of the output of the second phase comparator on the output of the first phase comparator or a loop filter which controls the VCO.
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申请公布号 |
US4297650(A) |
申请公布日期 |
1981.10.27 |
申请号 |
US19790108249 |
申请日期 |
1979.12.27 |
申请人 |
NIPPON ELECTRIC CO., LTD. |
发明人 |
SHINMYO, SABURO |
分类号 |
H03L7/087;H03L7/10;H04L27/227;(IPC1-7):H03L7/10 |
主分类号 |
H03L7/087 |
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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