Re: [SI-LIST] : Output Impedance

Brian Young (r16869@email.sps.mot.com)
Thu, 02 Apr 1998 08:50:00 -0500

I'm convinced IBIS works great if you have no rail collapse so that the IV
curves are valid. I don't think they are valid under heavy bus switching
with significant rail collapse, although I hear people claim otherwise. I
just don't see how IV curves provided at, say 3.3V, work when you have 0.5V
of collapse. Any comments?

Brian Young
Motorola

Larry Smith wrote:

> ... I have compared the results of IBIS simulation to that of full
> HSPICE model simulation and hardware measurements for several different
> transmission line problems. IBIS model simulation compares very well to
> both.