关键词: 锁相环, 电源噪声, SPICE, 抖动灵敏度

Abstract:

PLL is noise-sensitive devices and power-supply noise is the largest source of interference.For a high system performance,reducing power-supply noise is the only choice for most engineers.The concept is presented in the paper that power-supply noise induced jitter in different frequencies is different and that reducing noise alone may lead to over-design or failure.A SPICE model of PLL is built and self-developed software is used to illustrate the concept of jitter sensitivity.

Key words: PLL;power-supply noise;SPICE;jitter sensitivity