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How to get smooth and accurate output waveform without increasing simulation time

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Dear All,

I was simulating a divider (by-2) extracted circuit @ 17 GHz input frequency using transient analysis.

My simulation option was as below:-

simulatorOptions options psfversion="1.1.0" reltol=1e-3 vabstol=1e-6 \
iabstol=1e-12 temp=80 tnom=27 gmin=1e-12 rforce=1 vthmod=vthcc \
ivthn=300e-9 ivthp=70e-9 ivthw=0 ivthl=0 maxnotes=5 maxwarns=5 \
digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \
dochecklimit=yes checklimitdest=psf
tranCheckLimit checklimit checkallasserts=yes severity=none
tran tran stop=60n errpreset=moderate write="spectre.ic" \
writefinal="spectre.fc" annotate=status maxiters=5

But with the above option, I am getting the output waveform @8.5 GHz as below:-

The waveform is not smooth and many points are missing at the crucial regions. Is there any way we can smoothen the waveform without increasing simulation time significantly.


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