Method of detecting jitter in clock of apparatus and apparatus utilizing same

    公开(公告)号:US11381247B1

    公开(公告)日:2022-07-05

    申请号:US17225074

    申请日:2021-04-07

    摘要: An apparatus includes a phase-locked loop and a jitter detection circuit. A method of detecting a jitter in the apparatus includes the phase-locked loop generating a lead control signal and a lag control signal according to a reference clock and a feedback clock, the jitter detection circuit generating a jitter signal according to the lead control signal and the lag control signal, the jitter detection circuit generating a jitter window signal according to the jitter signal, the jitter detection circuit identifying jitters in the clock signal according to the jitter signal and the jitter window signal, and the jitter detection circuit outputting a jitter indication signal according to the number of jitters identified.