Re: [SI-LIST] : Clean sheet of paper

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From: Jon Powell (jonp@pacbell.net)
Date: Wed Dec 22 1999 - 20:13:26 PST


I agree completely.

Course, what we are doing now is hard.
The question is. Does this hard have advantages over our current hard?

jon

Douglas C. Smith wrote:

> Hi Jon and All,
>
> When you drive through a capacitor you are basically differentiating
> the signal. The receivers will become more sensitive to noise. A small
> noise pulse will be integrated into a signal. It would be more
> difficult to distinguish a real signal from one due to, for instance,
> ESD.
>
> Doug
>
> Jon Powell wrote:
> >
> > I saw an interesting paper at an IEEE conference (In Monterey, perhaps
> > EMC?) a couple of years ago. The author conjectured that the problem
> > people are having is that everything is dependent on charging a large
> > capacitor (the TLINE) and we have to get away from this.
> >
> > His proposal. Make all drivers drive through a large series capacitor.
> > So the only signal sent it a pulse (+ or -) and you re-integrate the
> > signal at the receivers (through some simple logic he presented).
> >
> > A couple of good things:
> > 1) You don't need low-resistive contacts for your pads. Just squares of
> > metal that sit over top of each other and form the capacitors.
> > 2) You don't have to worry about current content.
> >
> > Some bad things (that he didn't mention).
> > 1) Crosstalk noise probably gets more critical.
> > 2) Nothing is really "clocked" anymore (hey, maybe this goes in the good
> > thing category).
> >
> > Once again, this is not my idea. (but I sort of like it).
> >
> > regards and Happy Hollidays.
> > jon
> >
> > --
> > Jon Powell
> > Director of HSSD Consulting Services
> > Viewlogic Systems, INC.
> > 805 988 8250
> >
> > **** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP.
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>
> --
> -----------------------------------------------------------
> ___ _ Doug Smith
> \ / ) P.O. Box 1457
> ========= Los Gatos, CA 95031-1457
> _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799
> / /\ \ ] / /\ \ Mobile: 408-858-4528
> | q-----( ) | o | Email: doug@dsmith.org
> \ _ / ] \ _ / Website: http://www.dsmith.org
> -----------------------------------------------------------
>
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--
Jon Powell
Director of HSSD Consulting Services
Viewlogic Systems, INC.
805 988 8250

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