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Simulators >> Circuit Simulators >> pole-zero analysis with Spectre
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Message started by sutapanaki on Jun 3^rd, 2004, 7:55pm

Title: pole-zero analysis with Spectre
Post by sutapanaki on Jun 3^rd, 2004, 7:55pm

Hi,

I was wondering if it's possible to perform a pole-zero analysis using Spectre. I looked at the help for Cadence IC5, couldn't find anything about it.
If someone can also answer the same question about Pspice, it'd great.
Thanks

Title: Re: pole-zero analysis with Spectre
Post by Andrew Beckett on Jun 3^rd, 2004, 9:38pm

This was added in the IC5033 release (released
last October). It is called "pz" in spectre and on the
ADE choose analysis form.

Andrew.

Title: Re: pole-zero analysis with Spectre
Post by Eugene on Jun 8^th, 2004, 9:58am

Does pz analysis work with Monte Carlo analysis? Power systems and motor drives often have multiple interacting feedback loops which make classical gain/phase margins hard to apply. With a Monte Carlo pz analysis one could plot the clusters of closed loop poles and assess relative stability by measuring proximity to the imaginary axis.

Title: Re: pole-zero analysis with Spectre
Post by Andrew Beckett on Jun 8^th, 2004, 2:28pm

I think it should do - but I've not tried it. It does work with sweeps, so should really work with monte-carlo.

Not sure if I'll have a moment to try this or not in the next week or so...

Andrew.