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April 1997

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Subject:
Re: How stable and repeatable are PCB transmission characteristics
From:
Jeff Seeger <[log in to unmask]>
Date:
Thu, 24 Apr 1997 14:28:17 -0400
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Ray,

	The only caution I'd add to Andy's excellent reply is to
	watch out for the DC series resistance of a trace this long.

	Practical experience has led me to find that when this sort
	of problem arises, one tends to be operating in an impedance
	controlled realm. This will of course drive your trace width
	selection.  Add in some circuit density, and you may be using
	a line width that can inject a significant resistance.

	Good luck,
-- 
 
      Jeff Seeger                             Applied CAD Knowledge Inc
      Chief Technical Officer                      Tyngsboro, MA  01879
      [log in to unmask]                               508 649 9800

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