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December 2001

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Subject:
From:
Phil Nutting <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 13 Dec 2001 14:03:14 -0500
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text/plain (70 lines)
Gaetan,

I made an inquiry to one of our design engineers regarding pcb traces as
coils.  Here is his response.


"If you know the cross sectional area and length of the winding you can
calculate the resistance.  Ohms = rho x length/ Area where rho is the
resistivity of the etch material.  For copper rho = 1.72e-8 ohm x
meters."

Hope this helps.

Phil Nutting


 -----Original Message-----
From:   Phil Nutting  
Sent:   Thursday, December 13, 2001 12:43 PM
To:     Stephen Quigley
Subject:        pcb coils

-----Original Message-----
From: Gaetan Fournier [mailto:[log in to unmask]]
Sent: Thursday, December 13, 2001 12:27 PM
To: [log in to unmask]
Subject: [TN] Trace resistance


Does anybody knows a good link or freeware for DC resistive calculation
in
function with the thickness, width and length of a PCB track. I already
know
about "trace with calculator"
http://www.aracnet.com/cgi-usr/gpatrick/trace.pl but this is not exactly
what I'm looking for, current and temperature rises aren't the issues
for my
application. It's more a question of DC equivalent resistive for a coil
made
with a long PCB trace.
Thanks
GF

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