| 摘要 |
A feed-forward controlled phase difference detector for detecting a phase difference using the output of a comparator included in an analog-to-digital converter, for example, is combined with a known digital feedback controlled phase difference detector for recovering a clock signal. The feed-forward controlled phase difference detector has its loop gain controlled adaptively. By utilizing these two types of phase difference detectors, a clock recovery circuit for recovering a clock signal synchronized to the data read out from a storage medium, for example, can operate faster and more stably.
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