发明名称 |
CIRCUIT TO MINIMIZE LOCAL CLOCK FREQUENCY DISTURBANCES WHEN PHASE LOCKING TO A REFERENCE CLOCK CIRCUIT |
摘要 |
<p>TITLE CIRCUIT TO MINIMIZE LOCAL CLOCK FREQUENCY DISTURBANCES WHEN PHASE LOCKING TO A REFERENCE CLOCK CIRCUIT A frequency disturbance minimization circuit for use in a phase locked loop circuit. A pulse generator eliminates random phase shift, which occurs after a reference clock outage, by synchronizing counted down derivatives of the local and reference clock circuits. A window circuit provides a signal representative of the difference in phase between these local and reference clock circuits. A counter accumulates these phase difference window signals for periodic interrogation by a microprocessor which causes a voltage controlled oscillator to adjust its frequency in the direction necessary to eliminate this phase difference.</p> |
申请公布号 |
CA1215143(A) |
申请公布日期 |
1986.12.09 |
申请号 |
CA19840455941 |
申请日期 |
1984.06.05 |
申请人 |
GTE COMMUNICATION SYSTEMS CORPORATION |
发明人 |
EDWARDS, IVAN L.;MCLAUGHLIN, ROBERT C.;MACRANDER, MAX S. |
分类号 |
H03L7/085;H03L7/10;(IPC1-7):H03L7/14 |
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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