All-digital phase-locked loop for adaptively controlling closed-loop bandwidth, method of operating the same, and devices including the same

摘要

A method of operating an all-digital phase-locked loop (ADPLL) includes detecting a phase change in a feedback signal of the ADPLL using a search window and controlling a closed-loop bandwidth of the ADPLL based on a detection result. The closed-loop bandwidth when the phase change is detected outside the search window is greater than the closed-loop bandwidth when the phase change is detected within the search window.

主权项

1. A method of operating an all-digital phase-locked loop (ADPLL), the method comprising:
detecting a phase change in a feedback signal of the ADPLL using a search window defined by two reference clock signals related to an input clock signal; and controlling a closed-loop bandwidth of the ADPLL based on a detection result of the detecting.