经典paper a digital clock and data recovery architecture for multi-gigabit/s binary links中的有个参数叫 NEL=18,不明白如何计算,原文中的解释是(delay through the control path of the DPC and delay through the desialization process)求大牛指点........... matalb仿真 NEl的变化对环路带宽还有相位裕度影响不是很大。