Hybrid phase-locked loop
    2.
    发明授权
    Hybrid phase-locked loop 有权
    混合锁相环

    公开(公告)号:US07679454B2

    公开(公告)日:2010-03-16

    申请号:US11874209

    申请日:2007-10-18

    IPC分类号: H03L7/00

    摘要: A phase-locked loop (PLL) including a digital PFD, a digital loop filter, a decision circuit, a fractional-N PLL, and a frequency divider is provided. The digital PFD generates a first detection signal according to the phase error or frequency difference between an input signal and a feedback signal. The digital loop filter generates a first control signal according to the first detection signal. The decision circuit generates a divisor value according to the first control signal. The fractional-N PLL generates an oscillation signal according to the divisor value and a reference signal. The frequency divider divides the oscillation signal to produce the feedback signal. The fractional-N PLL includes a fractional-N frequency divider for generating a frequency-divided signal for use in tracking the reference signal according to the divisor value by employing phase swallow means.

    摘要翻译: 提供了包括数字PFD,数字环路滤波器,判决电路,分数N PLL和分频器的锁相环(PLL)。 数字PFD根据输入信号和反馈信号之间的相位误差或频率差产生第一检测信号。 数字环路滤波器根据第一检测信号产生第一控制信号。 决定电路根据第一控制信号产生除数值。 分数N PLL根据除数值和参考信号产生振荡信号。 分频器分频振荡信号产生反馈信号。 分数N PLL包括分数N分频器,用于通过采用相位吞吐装置,根据除数值产生用于跟踪参考信号的分频信号。

    HYBRID PHASE-LOCKED LOOP
    3.
    发明申请
    HYBRID PHASE-LOCKED LOOP 有权
    混合锁相环

    公开(公告)号:US20080094145A1

    公开(公告)日:2008-04-24

    申请号:US11874209

    申请日:2007-10-18

    IPC分类号: H03L7/087 H03L7/00

    摘要: A phase-locked loop (PLL) including a digital PFD, a digital loop filter, a decision circuit, a fractional-N PLL, and a frequency divider is provided. The digital PFD generates a first detection signal according to the phase error or frequency difference between an input signal and a feedback signal. The digital loop filter generates a first control signal according to the first detection signal. The decision circuit generates a divisor value according to the first control signal. The fractional-N PLL generates an oscillation signal according to the divisor value and a reference signal. The frequency divider divides the oscillation signal to produce the feedback signal. The fractional-N PLL includes a fractional-N frequency divider for generating a frequency-divided signal for use in tracking the reference signal according to the divisor value by employing phase swallow means.

    摘要翻译: 提供了包括数字PFD,数字环路滤波器,判决电路,分数N PLL和分频器的锁相环(PLL)。 数字PFD根据输入信号和反馈信号之间的相位误差或频率差产生第一检测信号。 数字环路滤波器根据第一检测信号产生第一控制信号。 决定电路根据第一控制信号产生除数值。 分数N PLL根据除数值和参考信号产生振荡信号。 分频器分频振荡信号产生反馈信号。 分数N PLL包括分数N分频器,用于通过采用相位吞吐装置,根据除数值产生用于跟踪参考信号的分频信号。