Re: [SI-LIST] : **error**: internal timestep too small

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From: Kim Helliwell (khelliwe@acuson.com)
Date: Wed Jan 19 2000 - 17:13:06 PST


"Mellitz, Richard" wrote:
>
> I know that one. However there are practices the seem to cause this (ITTS)
> more than others. OOOH not another acronym! For example, using 0V DC
> sources to short nodes is inherently more stable than lots of .00001 ohm
> resistors.

Absolutely! If you knew what those .00001 ohm resistors were doing
to your matrix (and therefore to your accuracy), you would swear never
to do that again! Always use 0-volt sources as shorts, wires, what
have you; they're good for more than measuring current!

> Insuring a solution for all incantations of your design is a real art.

Yes, indeed!

-- 
Kim Helliwell
Senior CAE Engineer
Acuson Corporation
Phone: 650 694 5030  FAX: 650 943 7260

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