At 12:06 AM 12/31/01 +0000, Dave Dilatush wrote:
>Dwayne Reid wrote...
>
> >PS: I think the name of Mr Woodward's article was: Low Cost Precision
> >Thermometry.  Try doing a web search on that string.
>
>I didn't get anything off google on that string, but Linear Technology
>application note AN-45 has what I think is Jim Williams' original
>circuit of the "delta-Vbe" thermometer, at:
>
>http://www.linear-tech.com/pdf/an45.pdf
>
>on page 7.  It has a pretty good explanation of the circuit's principle
>of operation, and should be easily adaptable to run off a 5V supply for
>input to a PIC's A/D converter.

I'm on-line for a few minutes and found the following info via google:

An excellent implementation of the idea is "Low-Cost Precision Thermometry
by W. Stephen Woodward which won the Best of Issue of Electronic Design for
August 21, 1995 and was reprinted on pg. 32 in the October 24, 1996 "Best
Ideas for Design" supplement to Electronic Design

So: check Electronic Design archives for those dates

dwayne



Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

Celebrating 17 years of Engineering Innovation (1984 - 2001)

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