Re: [SI-LIST] : inductance extracted by ansoft SI3D

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From: Charles Grasso (chasgra@msn.com)
Date: Wed Jul 19 2000 - 12:48:16 PDT


It might interest this group that Ansoft recently announced the ability
to
derive spice (time-domain) models from a full-wave solution in HFSS.

----- Original Message -----
From: <Aubrey_Sparkman@Dell.com>
To: <matt@silicon-spice.com>; <si-list@silab.eng.sun.com>
Sent: Monday, July 17, 2000 11:26 AM
Subject: RE: [SI-LIST] : inductance extracted by ansoft SI3D

> Matt,
>
> We are off-thread, But;
>
> Actually the TDR is sensitive to IMPEDANCE differences, which cause
> reflections. Therefore it could pick up a short highly inductive
connection
> easier than a longer impedance shift.
>
> But on a more realistic note, compare the edge rate of the system you are
> designing to the edge rate of the TDR. This will help you answer a
> different question which would be: does the TDR have enough resolution for
> my design. And remember the measurement 10X/10% rule. In most cases (for
> most of us), if the TDR can't see the discontinuity, then neither can the
> system.
>
> Aubrey Sparkman
> Signal Integrity
> Aubrey_Sparkman@Dell.com
> (512) 723-3592
>
>
>
>

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