发明名称 |
Method and apparatus for fast lock time |
摘要 |
A system and method for fast frequency locking are provided in which the phase difference between first and second synchronization signals is measured (22). The frequency difference between the two signals is then determined (24). The frequency of the second synchronization signal is then set to that of the first synchronization signal (26). Thereafter, the feedback loop of a phase-locked loop circuit is closed, with an error signal representative of the phase difference between the first and second synchronization signals being offset by an amount equal to an error signal generated when the frequency of the second synchronization signal is set to that of the first synchronization signal.
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申请公布号 |
US5612980(A) |
申请公布日期 |
1997.03.18 |
申请号 |
US19950408313 |
申请日期 |
1995.03.22 |
申请人 |
ALCATEL NETWORK SYSTEMS, INC. |
发明人 |
LEDDA, FRANCESCO;TSAO, JEFFREY W. |
分类号 |
H03L7/085;H03L7/14;H04L7/033;(IPC1-7):H03D3/24 |
主分类号 |
H03L7/085 |
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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