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Mar 26th, 2023, 11:16pm
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 iVenky Senior Member Offline Posts: 101 Silicon Valley Root locus and Nyquist plots in cadence virtuoso ADE Jan 18th, 2021, 4:49pm   Hi,Is there a way to plot root locus and Nyquist plots in Cadence virtuoso (for example, when we run stb analysis for a feedback system)? Back to top IP Logged
 Frank Wiedmann Community Fellow Offline Posts: 677 Munich, Germany Re: Root locus and Nyquist plots in cadence virtuoso ADE Reply #1 - Jan 19th, 2021, 12:38am   You can do a Nyquist plot by plotting the imaginary part of the loop gain against its real part. Back to top IP Logged
 iVenky Senior Member Offline Posts: 101 Silicon Valley Re: Root locus and Nyquist plots in cadence virtuoso ADE Reply #2 - Jan 28th, 2021, 11:54am   Thanks, do you know if there is a way to do root locus for an stb simulation?I would just like to find the location of poles/zeros based on an stb simulation and that's the purpose. Back to top IP Logged
 iVenky Senior Member Offline Posts: 101 Silicon Valley Re: Root locus and Nyquist plots in cadence virtuoso ADE Reply #3 - Jan 29th, 2021, 3:09pm   Is it fundamentally possible to find poles and zeros in stb analysis? Back to top IP Logged
 Frank Wiedmann Community Fellow Offline Posts: 677 Munich, Germany Re: Root locus and Nyquist plots in cadence virtuoso ADE Reply #4 - Feb 1st, 2021, 1:08am   I don't think so. Spectre also has a pz analysis, but I have never used it. Back to top IP Logged
 iVenky Senior Member Offline Posts: 101 Silicon Valley Re: Root locus and Nyquist plots in cadence virtuoso ADE Reply #5 - Feb 1st, 2021, 7:53pm   I see. Thanks! I wish there was a way to find the location of poles and zeros approximately with stb analysis if I input an estimate of number of poles and zeros in the system. Back to top IP Logged
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