Re: [SI-LIST] : matched delay

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From: David Instone (david_instone@uk.xyratex.com)
Date: Tue Nov 21 2000 - 02:50:46 PST


Michael Nudelman wrote:
....snip....
> Then take your skew number, which
> is roughly 6 inches per ns, or 6 mils per ps.

Agreed

> So, every, say, 20 mils
> traces' skew will give you 120 ps signal skew.

Having frightened the life out of me, because FC only allows 25ps of
skew at the TX, I then realised your maths were a tad off! 20 mils
equates to 20/6 ps, not 20*6 ps so your 120ps would take 120*6 mils
which is 0.72 inch.

Oh well, we all have bad days.

-- 
Regards

Dave Instone. Compliance Engineer Test Systems, MP24/22 Xyratex, Langstone Rd., Havant, Hampshire, P09 1SA, UK. Tel: +44 (0)23-92-496862 (direct line) Fax: +44 (0)23-92-496014 http://www.xyratex.com Tel: +44 (0)23-92-496000

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