发明名称 |
Phase-locked loop circuit having phase lock detection function and method for detecting phase lock thereof |
摘要 |
A phase-locked loop circuit including a lock detection function is disclosed. The phase-locked loop circuit comprises a lock detection circuit. The lock detection circuit includes a lock-detection-start-signal generator, a lock-detection-clock generator, and a lock-detection-signal generator. The lock-detection-start-signal generates a lock detection start signal when the pulse width of an up signal and a down signal reaches a predetermined value. The lock-detection-clock generator generates a lock detection clock signal on the basis of the up signal and the down signal. The lock-detection-signal generator counts the lock detection clock signal, and generates the lock detection signal. The phase-locked loop circuit is capable of discriminating the operating regions thereof and outputting a lock detection signal when the locking of phase is completed.
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申请公布号 |
US2005073343(A1) |
申请公布日期 |
2005.04.07 |
申请号 |
US20040960367 |
申请日期 |
2004.10.06 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM WOO-SEOK;JEON PHIL-JAE |
分类号 |
H03L7/08;H03L7/00;H03L7/089;H03L7/095;(IPC1-7):H03L7/00 |
主分类号 |
H03L7/08 |
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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