FreeLists / si-list / [SI-LIST] Re: Serpentine Traces

[Ed Sayre III <esayre3@xxxxxxxx>]

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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