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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 24 Dec 2003 07:16:15 -0800 |
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I have a project that seems to be a good candidate for a current sense
resistor made as a part of the PCB. I am using the free calculator,
PCBTEMP, from the UltraCAD website (http://www.ultracad.com/calc.htm) for
geometry calculations. I need to know the expected variability in thickness,
batch to batch, for the copper foil on 2-oz stock. I can live with the 0.4%
TC of the Cu, but I need to evaluate all the other variables in my error
budget before I present my proposal. I would appreciate any success (or
horror) stories from people who have (not) used the board copper as a
current sense method.
Thanks,
Carl
Carl Van Wormer
Cipher Systems
1815 NW 169th Place, Suite 5010
Beaverton, OR 97006
Phone (503)-617-7447 Fax (503)-617-6550
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