[SI-LIST] Re: Convergence problems with Hspice
- From: "Ingraham, Andrew" <Andrew.Ingraham@xxxxxxxxxx>
- To: "si-list" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 26 Sep 2001 08:00:01 -0400
Convergence problems are a fact of life in any SPICE. There is no
simple way around many of them. Some commercial versions of SPICE (such
as HSPICE) include lots of enhancements that make them more robust, but
there seems to be no way to totally safeguard against convergence
problems. Problems like yours, where problems appear when you combine
everything together, are not uncommon.
If you have more than one HSPICE version available, try them.
Occasionally the small changes in one version may either alleviate your
unique convergence problems, or make them worse. The W-line code is
relatively new, and there are subtle differences from version to
version.
There are a number of SPICE options that you can adjust. Crack open the
manuals and try some of them. Just be aware that the changes you make,
can affect the results, so be careful. It's tempting to stop tweaking
once you achieve convergence.
Regards,
Andy
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