| 摘要 |
A power control circuit includes a check unit that receives a reference clock and generates a check signal for cyclically activating a feedback loop of a DLL circuit, a phase detecting unit that detects a phase difference between the reference clock and a feedback clock, and generates a phase difference detection signal, and a signal combining unit that generates a power cutoff signal in response to a locking completion signal, the check signal, and the phase difference detection signal.
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