> Da: D. C. Sessions[SMTP:email@example.com]
> Inviato: gioved=EC 23 aprile 1998 21.10
> A: si-list@silab.Eng.Sun.COM
> Oggetto: Re: [SI-LIST] : Serpentine traces
> Paul Thompson wrote:
> > >Has anyone ever tried to simulate the effect of serpentine coupled
> lines in
> > >SPICE?
> > I have a related question: Let's say you have a big wide bus and you
> > to match the lengths of all the traces. Trying to put wide spacing
> > all the serpentine traces would obviously require lots of layers. As=
> > alternative, what do people think of routing the "doubled-back" secti=
> > all on a different layer, preferably one on the opposite side of the
> > plane that the "main" traces are run? I'm assuming here that the ent=
> > bus switches at the same time.
> Layer-to-layer manufacturing mismatch is pretty fierce, and then there
> are the vias. Seems to me that getting the delays matched is going
> to be a LOT of work, and will never be as consistent in manufacture
> as double-back would be.
> D. C. Sessions