| 摘要 |
A phase-locked loop (PLL) circuit having a phase build-out function, and a phase control method of the PLL circuit. In the circuit and method 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 amplifier and a digital filter to restructure an output phase to match the input phase before change. As to the cycle-wander component detected at the same time, no phase restructuring is carried out. |
