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GMRES solver could not converge to the desired tolerance. Please try to increase krylov_size Error while running Pnoise

Hello

I am running PSS+Pnoise on LC-VCO. VCO is having regulated supply. At the output of Band gap there is a RC filter.

If i increase the size of RC filter then Pnoise start to give error "GMRES solver could not converge to the desired tolerance. Please try to increase krylov_size" . Although PSS is converging.

I set the krylov_size=400 with additionalParams option in Pnoise but still having this issue.

Can you please let me know how to resolve this error and why this happening with big RC only?

With Regards

Munish

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Andrew Beckett over 6 years ago

Hi Munish,

Which spectre version are you using? (the subversion will show in the spectre log file)

Andrew
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Munish86 over 6 years ago in reply to Andrew Beckett

Hello Andrew

Version 18.1.0.143.isr1 64bit

With Regards

Munish
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Andrew Beckett over 6 years ago in reply to Munish86

Hi Munish,

OK, since that's a recent version, please contact customer support so that we can look into the reasons why it is struggling to converge.

Andrew.
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Andrew Beckett over 6 years ago in reply to Munish86

Hi Munish,

OK, since that's a recent version, please contact customer support so that we can look into the reasons why it is struggling to converge.

Andrew.
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Munish86 over 6 years ago in reply to Andrew Beckett

Thanks Andrew .
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