RE: LVDS receivers with internal termination

FYI: I know of two large companies that simulated entire boards with
thousands of nets with HSpice in order to get the accuracy that was needed.
In at least one of the cases, we built pre and post processor software to
generate the HSpice inputs with multiple VTT and Zo and Rt etc. and to sort
through the outputs to find potential violations. This was in 1991.

The board took from Friday PM until Monday to run. (On a Sun3 I think).

Regards, John Allen

John Allen  Sr. Consulting Engineer   jallen@IronBridgeNetworks.com
<mailto:jallen@IronBridgeNetworks.com>
IronBridge Networks / 55 Hayden Avenue / Lexington MA  02421 / USA
phone: 781-372-8151  fax:   781-372-8092  Main Number 781-372-8000
 
> -----Original Message-----
> From: Scott McMorrow [mailto:scott@vasthorizons.com]
> Sent: Thursday, March 16, 2000 5:11 PM
> To: Stephen_Miller@ne.3com.com; ibis
> Subject: Re: LVDS receivers with internal termination
>
>
> Stephen,
>
> Thanks for your reply. I will keep your thoughts in mind.
> Unfortunately, HSPICE is not appropriate for full board and system
> simulations with 100's or 1000's of differential pair nets.
>
> I expect to perform some spice to ibis extractions and
> correlations to Hspice in the next week.
> I will let the reflector know what the results of my work are.
>
>
> regards,
>
> scott
>
> Stephen_Miller@ne.3com.com wrote:
>
> > Scott: We've found that Spice (we use HSPICE) is the only thing
> that works
> > correctly so far. Our IBIS-based simulators aren't quite up to
> this just yet.
> > Hope this helps.
> >
> > Steve
>
> --
> Scott McMorrow
> Principal Engineer
> SiQual, Signal Quality Engineering
> 18735 SW Boones Ferry Road
> Tualatin, OR 97062-3090
> (503) 885-1231
> http://www.siqual.com
>
>
>
Received on Thu Mar 16 15:33:35 2000