Re: [SI-LIST] : Return planes for Gigabit differential signals

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From: Michael Nudelman (mnudelman@tellium.com)
Date: Tue Nov 28 2000 - 07:41:39 PST


Any well-decoupled power plane is good enough. We use it without
noticeable problems.

Mike.

Alex March wrote:

> Hello everybody,
>
> I would like to ask your opinion about the
> following problem: I have a board with some high speed
> SerDes at 2.125 Gbps (differential). Since there are
> many lines like this, I would like to route some of
> them between power planes (2.5V and 3.3V) or between a
> GND and a power plane. This would save me some layers.
> Now I saw some application notes which recomend to
> use only GND planes as reference for these lines, so I
> don't know which is the best solution.
>
> Many thanks,
>
> Alex
>
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