[SI-LIST] Re: Serpentine Traces
- From: Ed Sayre III <esayre3@xxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 09 Sep 2002 16:37:42 -0400
Praveen,
Serpentine traces should be treated as any other traces when routed next
to an adjacent wire, even if that adjacent wire is the same net. If the
route is carrying high frequency signals more space will be needed to
isolate it. This is the same rule of thumb that is used for two adjacent
nets routed side by side. If possible round the corners of the serpentine
to avoid the impedance discontinuity of the corner.
Try looking at stripline vs microstrip vs coplanar stripline vs coplanar
microstrip.
Regards
-Ed
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
NORTH EAST SYSTEMS ASSOCIATES, INC
-------------------------------------
"High Performance Engineering & Design"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Edward Sayre 3rd e-mail: esayre3@xxxxxxxx
NESA, Inc. http://www.nesa.com/
5 Lan Drive, Suite 200 Tel +1.978.392-8787 x 218
Westford, MA 01886 USA Fax +1.978.392-8686
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 04:41 PM 9/6/2002 -0700, you wrote:
>Hello,
>
>Does anybody know the design rules of the serpentine traces on the
>board ? I am trying to evaluate different types of serpentine traces
>looking at the group delay caused by the corners. Any information or
>literature on this would be appreciated.
>
>Thanks,
>--
>Praveen Soora
>ECAD Engineering,
>Apple Computer Inc.,
>408 974 0595
>
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
NORTH EAST SYSTEMS ASSOCIATES, INC
-------------------------------------
"High Performance Engineering & Design"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Edward Sayre 3rd e-mail: esayre3@xxxxxxxx
NESA, Inc. http://www.nesa.com/
5 Lan Drive, Suite 200 Tel +1.978.392-8787 x 218
Westford, MA 01886 USA Fax +1.978.392-8686
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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