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Simulators >> Circuit Simulators >> PZ-analysis in spectre
https://designers-guide.org/forum/YaBB.pl?num=1165532925

Message started by hchanda on Dec 7^th, 2006, 3:08pm

Title: PZ-analysis in spectre
Post by hchanda on Dec 7^th, 2006, 3:08pm

Hi all,

I am not at all aware of the PZ analysis in spectre. Can anyone please provide an example ?
I would like to understand what input source implies.
I tried looking into the manual, could not find any info.
I am trying to find Poles and zeros in LDO.

Thank you,
hc

Title: Re: PZ-analysis in spectre
Post by sheldon on Dec 10^th, 2006, 6:59pm

HC,

Hopes this helps.

Best Regards,

Sheldon

Title: Re: PZ-analysis in spectre
Post by Andrew Beckett on Dec 12^th, 2006, 2:12pm

It's also a good idea to read the documentation, since there is some... Look in cdsdoc or in the pdf files
under <mmsimInstDir>/doc

Andrew.

Title: Re: PZ-analysis in spectre
Post by hchanda on Dec 12^th, 2006, 4:45pm

Thank you sheldon. But I do not understand the significance of the input probe, which is a voltage source.

Andrew, I tries searching in the cdsdoc but could not get the information that I am looking for.
I would like to know what is the purpose of the input probe ? If we have a multiple feedback system then how to
do the PZ analysis.

Thank you,
hc

Title: Re: PZ-analysis in spectre
Post by Andrew Beckett on Dec 13^th, 2006, 8:31am

Hi hc,

The input probe and output probe are to allow it to compute the zeros. The poles are computed anyway.

Even if there are multiple feedback paths, the poles and zeros are computed.

This is explained even in "spectre -h pz"

Regards,

Andrew.