On Mon, 7 Jan 2002, Dave Dilatush wrote:

>
> I think where this "Delta-Vbe" sensing method shines best is in
> situations where the ability to interchange sensors without having to
> re-calibrate is extremely important, along with extremely low sensor
> cost, but where the cost of the measurement circuitry is relatively
> unimportant.  It's ideal for monitoring die temperatures on CPU chips.

  I wasn't follow this subject but if delta means diference I have some
doubts about the interchangeability of the sensors. Maybe a ratio.
There are five basic methodes of measuring temperature with a transistor:
1. Ib = constant, measuring Vbe, only be junction is used
2. Vbe = constant, measuring Ib, only be junction is used
3. Ib = constant, measuring Ic
4. Ib = constant, measuring Vce
5. Ib = constant, measuring both Vce and Vbe

But all methodes are too complicated if we think to the LM35 family.

regards, Vasile

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics