> Inviato: luned=EC 20 luglio 1998 18.44
> A: si-list@silab.Eng.Sun.COM
> Cc: ARNOLD_PETERfirstname.lastname@example.org
> Oggetto: [SI-LIST] : Non-ideal return current paths
> Dear SI-List,
> I am working in a PC board environment with rise-times < 1ns. A
> of my signals have to switch between layers referenced to
> planes. This means a less-than-ideal ground return path exists
> these signals.=20
> I have added some decoupling between planes within an inch of =
> where this occurs, but it was only a guess as to how much I
> Also, I suspect that if many such signals switch at once, their
> currents must all share the same few caps simultaneously, =
> multiplying the voltage induced across the ESL of the caps.
> I'm looking for advice on quantifying the effects of my =
> return paths on the propagation delay and shape of high-speed
> Any good references?
> peter arnold.