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https://designers-guide.org/forum/YaBB.pl Simulators >> RF Simulators >> Pnoise sims. for CDS SC integrator https://designers-guide.org/forum/YaBB.pl?num=1268390275 Message started by mvaibhav on Mar 12th, 2010, 2:37am |
Title: Pnoise sims. for CDS SC integrator Post by mvaibhav on Mar 12th, 2010, 2:37am Hi, I'm trying to simulate a SC integrator with correlated double sampling technique using Cadence SpectreRF. I used pss-pnoise simulations but I don't see any noise shaping from 0-fs/2 in the autozeroing phase as I would expect due to the PSD shaping function of CDS -- 2(1-cos2pifT). I tried both "sources" and "tdomain" pnoise. Thanks. |
Title: Re: Pnoise sims. for CDS SC integrator Post by mvaibhav on Mar 12th, 2010, 3:31am Analysis statements: simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \ tnom=25 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \ digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \ checklimitdest=psf pss pss fund=100M harms=100 errpreset=moderate saveinit=yes + writefinal="final.ic" swapfile="swap" method=gear2only + annotate=status pnoise ( net0140 net0112 ) pnoise start=1 stop=50M dec=10 + maxsideband=100 annotate=status Signal sources (only clocks active): V14 (phi2 0) vsource type=pulse val0=0 val1=1.5 period=10.0n delay=0 \ rise=150.00p fall=150.00p width=4.0n V15 (phi1 0) vsource type=pulse val0=0 val1=1.4 period=10.0n delay=4.9n \ rise=150.00p fall=150.00p width=4.5n |
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