[SI-LIST] Re: local and global ground

Scott:

Thank you for your suggestion. The connector model is fairly complex thus
the debugging would be quite difficult. At the daughter card side, the
circuit is rather simple, just an ideal transmission line with 100 ohm
termination.The problem occured when I use local ground as reference for the
transmission line. Wonder in general, whether non-ideal reference can be
used in HSPICE ?

This list is so quite these days. Guess all left for DesignCon. :)

Regards

Perry

Scott McMorrow wrote:

> Perry,
>
> the most likely cause of your "noise" is an inadvertent sneak path to
> node 0 on the
> daughter card side of the connector.  This can sometimes be burried deep
> within
> a vendors spice model.  I suggest that you systematically remove all
> elements on
> the daughter card side of the connector, and gradually add each one
> until the
> culprit is found.
>
> best regards and good luck,
>
> scott
>
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--
Perry Qu

Product Integrity         |      600 March Road
Alcatel Canada            |      Ottawa, ON K2K 2E6, Canada

DID: (613) 7846720        |      FAX: (613) 5993642


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