Re: [SI-LIST] : Split Plane

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From: Doug McKean (dmckean@corp.auspex.com)
Date: Tue May 23 2000 - 11:34:02 PDT


Short question ...

What's the fastest edge rate?

- Doug

Brad Crowell wrote:
>
> Michael and others who have replied,
>
> Yes, we have included alot of ground on this board. The concern for EMC/EMI
> issues is quite high for our client, this is for a medical application. We
> pulled out all the stops to ensure every signal layer is referenced to a
> ground plane, rather than a power plane, which I understand should give
> better EMC performance. We are also trying to avoid routing on the outer
> layers as much as possible. The stackup you attached to your reply would not
> provide as much interplane capacitive coupling, which concerns me. Clock
> rates on my board are about 100MHz max, not extremely fast but includes some
> devices with pretty quick edges.
>
> Thanks for all the comments,
> Brad

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