这里主要是看designer主要关注什么指标,如果是关注dutycycle,那么选择Edge Delay比较合适。 Sampled Phase:采样的相位分析。Sampled phase是可以用来测量固定时刻点的jitter,Samples Per Period是用来指定每周期测量多少个时刻点,Initial Sample Phase是用来指定第一个Sample的时刻。Add Specific Points用来指定特别关注的时刻点...
Noise type设置为sampled(jitter)。这种方法会计算pss过程中某一时刻的采样噪声。这个时刻由下面设置的event type决定。 Event type=edge crossing, Trigger=voltage, Output Nodes=/outp and /outn(这两个是comparator的输出node,注意这个必须是cross-coupled transistor的输出),Edge number=1, Threshold value=0.05(...
select the fullspectrum method for sidebands and choose 'sampled(jitter)' as the noise type.Event type is crucial here. Set it to 'edge crossing' with Trigger set to 'voltage', using nodes /outp and /outn (cross-coupled transistor outputs). The threshold value should be 0.05...
pnoise pnoise start=SIM__FREQDOMAIN__Fstart stop=SIM__FREQDOMAIN__Fstop \ dec=SIM__FREQDOMAIN__Npoints_per_decade pnoisemethod=fullspectrum \ noisetype=sampled measurement=[pm0] annotate=status pm0 jitterevent trigger=[DUT.LATCH\<5\>.vOUTp \ DUT.LATCH\<5\>.vOUTm] triggerthresh=(PNOISE...