| 摘要 |
A delay-lock loop (DLL) circuit and method that accept an input clock signal and a feedback clock signal, and provide the necessary additional delay to synchronize the feedback clock signal to the input clock signal. A single synchronization step is sufficient, provided that the frequency of the input clock signal is stable. Further, only one delay line is required to implement the DLL circuit. Therefore, the DLL of the present invention is both quick to "lock in" a clock signal and efficient in the use of hardware resources. Further, the present DLL is very accurate, because the same delay line is used to calculate the necessary additional delay and to generate the output clock signal.
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