[SI-LIST] Re: Seperate Sparameter for gnd & supply plane !!

lets say, one is interested in simulating some x interface and want to find
noise voltage on power and gnd rail separately.
s-parameter model (of power/gnd loop) will give only relative noise
difference between power/gnd.  gnd will always be assumed to be quiet. all
noise will appear on power rail.  But in actual system, when you take it in
lab. one can measure noise voltage independently on power and gnd rail.
noise on gnd rail is called ground bounce and noise on power rail is called
power noise.
How to mimic such scenario in simulation.  There are possibilities that gnd
noise can be higher than power noise. i need to know which is worse, power
plane routing or gnd plane routing? how to find it..

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