RE: [SI-LIST] : Broadside v edge coupled striplines

About this list Date view Thread view Subject view Author view

From: Lai, Ricky (Eng Hou) (Ricky.Lai@compaq.com)
Date: Sat Jan 20 2001 - 06:48:55 PST


Aubrey,

SI list should be a site for professional discussion, not for joking. I
don't think your comment about Compaq is just "fun".

At Compaq, we do understand the differences between boardside vs edge
couplings and do our analysis accordingly.

Rgds,
Ricky Lai
Compaq Computer

-----Original Message-----
From: Aubrey_Sparkman@Dell.com [mailto:Aubrey_Sparkman@Dell.com]
Sent: Friday, January 19, 2001 1:26 PM
To: scott@vasthorizons.com
Cc: SI-LIST@silab.eng.sun.com
Subject: RE: [SI-LIST] : Broadside v edge coupled striplines

Scott,
You have pointed out good ways to reduce those two factors, not eliminate
them, right? Do you have manufacturing data to how much reduction in
variation?

And CPW is an Edge-coupled system, right?

And I hope everyone realizes my comment about Compaq and Sun was made in
fun.

And I do know how to spell Broad Side, even if Outlook does not.

Aubrey Sparkman
Signal Integrity
Aubrey_Sparkman@Dell.com
(512) 723-3592

 
> Aubrey_Sparkman@Dell.com wrote:
>
> > Thanks for that correction. Isn't the difference is really in
> > manufacturing, not physics? An EDGE-coupled diff pair is
> more uniform
> > because the pattern is etched in the same process. The
> BROADSICE-coupled
> > diff pair is etched at two different times and additionally
> has to be
> > mechanically aligned for lamination. This adds two
> additional error terms
> > to the accuracy of your BROADSICE-coupled diff pair that
> the EDGE-coupled
> > diff pair does not have. So IMHO, you should really have a
> packing density
> > problem before you consider using BROADSICE-coupled traces.
> >
> > But if you are doing work for Compaq or Sun, you should use
> > BROADSICE-coupled diff pairs whenever possible. :-)
> >
> > Aubrey Sparkman
> > Signal Integrity
> > Aubrey_Sparkman@Dell.com
> > (512) 723-3592
> >
> >
> >
>
>
>
>

**** To unsubscribe from si-list or si-list-digest: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:30:41 PDT