摘要
通过分析三阶电荷泵锁相环的开环传输函数来确定系统的稳定性条件,得出了系统的稳定性主要与二阶滤波器两电容的比值、系统的衰减因子以及系统的零点分布有关,并计算出在不产生过冲的情况下这些值的范围。实际上本分析方法也可以用来分析二阶电荷泵锁相环的稳定性,这只需要假定二阶滤波器中的旁路电容为零即可。
The stability conditions are extracted by analyzing the open-loop transfer function of three-order charge PLL. It shows that the stability are mainly affected by the ratio of the two capacitors of the two-order loop filter, loop damping factor and loop zero. The ranges of these parameters are also calculated. In fact, this analysis is also fit to analyze the stability of two-order charge-pump PLL loop by simply setting the value of shunt capacitor of two-order filter to zero.
出处
《电子器件》
EI
CAS
2006年第2期483-485,共3页
Chinese Journal of Electron Devices
