Subject: Re: SOS noise Response to Greg

From: [email-masked]
Date: Wed, 1 Mar 1995 14:44:07 -0800

Hi Greg,

>Would I be correct to assume that a simulator can generate di/dt 
>information by using the risetime data and V-I curves?
YES

>1. Driver di/dt is dependent on the slew rate of the input to the
>   driver, which in turn is dependent on the previous stage of logic
>   and its loading.
The IBIS model should effectively include this effect.

>2. Driver di/dt is also dependent on its own loading, i.e. the package
>   and transmission line.  If there is strong coupling between adjacent
>   signals in the package, this can affect di/dt, too.
The transmission line should be included by the simulator.
The package effects would also be modeled, to the degree determined by the
type of package model included in the IBIS file.
Have a great day...Kellee Crisafulli, HyperLynx Inc.