Re: Fast TR

6 Sep 1996 10:49:25 -0400

we have modeled 30 to 60 pin connectors using field solver software - 2D BEM
technique by taking several connector slices. We then assigned several signal
and ground arrangements, the same as on test boards, and found about 15%
correlation to time domain measurements at 500ps rise times. So it can be
done, the question now is how do we achieve the same accuracy at 100-150ps
rise times, and also how can we take good time domain measurements at these
rise times?
Fabrizio Zanella
Date: 9/6/96 10:22 AM
From: Richard A. Schumacher

Microstrip is easy compared to multiple-pin connectors or
device packages. Can anyone demonstrate useful modelling
and simulation of crosstalk and ground bounce in a connector
with 40 single-ended switching lines and user-defined victim
line and signal/ground pin assignment, in which the connector
model is calculated by a solver rather than derived from
measurement? Let's say that "useful" means that the predicted
xtalk/gbounce are accurate to within 20% of measured values,
and that the model solver and the simulation together run in
less than 24 hours on the platform of choice.

Richard Schumacher

I do not speak in any capacity for the Hewlett Packard Company.