[SI-LIST] Re: Return current crosstalk?
- From: steve weir <weirsp@xxxxxxxxxx>
- To: patrick@xxxxxxxxx, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 01 Apr 2004 12:50:05 -0800
Patrick, you can run digital signals as you please on opposite sides of the
return plane. Due to skin effect, the plane shields the two signal layers
from each other very effectively.
Steve.
At 11:56 AM 4/1/2004 -0800, Patrick Jabbaz wrote:
>All,
>I have a Board stack-up that currently has a reference plane in the
>middle,=20
>Between two signal Layers
>
>L3 Int-sig1 Hor
>L4 Plane
>L5 Int-Sig2 Hor
>
>I normally would run adjacent signal layers at 90 degrees from each
>other, not in this case.
>Let's assume that I have signals running horizontal left to right on Int
>Signal layer 3
>I also have signals running horizontal (left to right) on Int Signal
>layer 5
>The signal traces lined up perfectly over each other.
>With that in mind, my question is the following
>Would the return currents cause cross-talk? Or would the return current
>be=20
>Riding only on the top and bottom surface of the reference plane without
>
>Interacting with one another?
>
>Inkra Networks
>Patrick Jabbaz CID
>Sr Board Layout Eng.
>40971 Encyclopedia Circle=20
>Fremont, CA 94538
>Work (510) 249-4835
>Mobile (408) 621-6533
>patrick@xxxxxxxxx
>
>
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Steve Weir
Teraspeed Consulting Group LLC
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http://www.teraspeed.com
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