Re: [SI-LIST] : What's your favourite Screwy SI Concept?

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From: Lee Ritchey (leeritchey@earthlink.net)
Date: Sat Jan 15 2000 - 12:15:54 PST


NO. Not true.

Aubrey_Sparkman@Dell.com wrote:

> Would it be appropriate to mention that for most applications, the best
> reasons to not have 90 degree angles may be outside the realm of Signal
> Integrity?
>
> Aubrey Sparkman
> Signal Integrity
> Aubrey_Sparkman@Dell.com
> (512) 723-3592
>
> -----Original Message-----
> From: Jeff Seeger [mailto:jseeger@appliedcad.com]
> Sent: Friday, January 14, 2000 12:05 PM
> To: si-list@silab.eng.sun.com
> Subject: Re: [SI-LIST] : What's your favourite Screwy SI Concept?
>
> Tom Dagostino wrote:
> >
> > Bending a wire keeps a uniform cross section. Putting a corner in a trace
> > adds extra C at the corner from a larger area.
> >
> And herein lies the arguement, I believe.
>
> Perhaps those who argue against "right angles" envision a
> geometry where the line has a squared corner both on the
> inside of the elbow and the outside.
>
> I would wager that those who claim no material effect are
> working with the usual CAD system/photoplotter geometry of
> a squared corner inside the elbow and a radiused one on the
> outside.
>
> An attempt at ascii art:
>
> "Right Angle" "Standard Practice"
>
> \ \ \ \
> \ \ \ \
> > > > )
> / / / /
> / / / /
>
> HTH,
> --
>
> Jeff Seeger Applied CAD Knowledge Inc
> Chief Technical Officer Tyngsboro, MA 01879
> jseeger "at" appliedcad "dot" com 978 649 9800
>
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> ------------------------------------------------------------------------
>
> Sparkman, Aubrey <Aubrey_Sparkman@Dell.com>
>
> Sparkman, Aubrey
> <Aubrey_Sparkman@Dell.com>
> Additional Information:
> Version 2.1
> Last Name Sparkman
> First NameAubrey
> Revision 19990728T212924Z

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