LM34 & LM331 Ideas

[Rene Schmitz]

At 15:13 06.09.98 -0500, you wrote:
>The LM34 looks like a good way to tempco just about
>anything. (CEM3374 Paul?) Digi-Key LM34DZ-ND $2.63
>
>http://www.tomg.vivid.net/misc/lm34.gif

Sure could be used if one uses a divider and a multipiler.
First convert the linear voltage of the sensor into its reciprocal and
then multiply the CVinput with that.

One thing I found is the use of KTY81 temperature sensors which are made
by Phillips.  They have a positive Tempco, and are pretty cheap. 
Unfortunately their behaviour is not linear and their tempco is too large,
but they
can be linearized (and the tempco adjusted) by a series resistor.

bye
 Rene