| 摘要 |
A PLL circuit having a phase build-out function and a phase control method of the PLL circuit, in which a phase build-out detector monitors the input phase of a PLL device and detects a transient wander component and a cycle wander component at the same time. When only the transient wander component is automatically detected, a phase build-out actuator resets a phase detector, a digital amp-1 and a digital filter to restructure an output phase as before an input phase change. As to the cycle wander component detected at the same time, no phase restructuring is carried out.
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