我对一个PLL进行了PSS+Pnoise 的直接仿真,spectreRF给出输出总噪声有好几条线,分别对应不同的jittereventtime,求教有人知道这是什么意思吗?不同的jittereventtime对应的rms jitter 从几ps到几十ps不等,哪个应该作为估计的jitter呢?
bow~
另外,在designer‘s guide上找到一点相关的内容:
The "jittereventtime" refers to the timescale of the pss timedomainresult that you get when you select "time" for the "Sweep" parameter inthe Direct Plot Form. Depending on your pss simulation setup (forexample the "tstab" parameter), this may be different from thetimescale in a transient analysis.
看不太懂..