warning: KTY84

[Rene Schmitz]

At 09:05 14.06.99 +0200, Martin Czech wrote:
>I tryed the Philips KTY84 this weekend.  Mmmh, why does it have this
>ring marker?  My ohm meter says, that it has different resistances
>depending on polarity. Oooops!! Another look into the data sheet shows
>a box where it says : ring to negative!
>
>I should have known this. These things are clever linearised thermistors,
>linear in one quadrant.
>
>Our vcos should be designed so that an input voltage of 0V gives a medium
>frequency, thus minimising the error. That means bipolar input voltages
>are used, you can't  use KTY84 type devices for that. But other circuits
>may have only one polarity, there these thermistors could be used.
>
>I'll have a further look at it as soon as my temperature test chamber
>is ready.  I've finished the mechanical construction part now, this is
>the part I sure hate the most.
>
>m.c.
>

Hi Martin and list, 

try the KTY-81, these are not polarized.  According to the datasheets the
KTY 83, 84 and 85 are polarized, and the KTY 81 & 82 are not.

Bye 
 René

             ,   : (uzs159 at uni-bonn.de)
|") [" |\ | ["   : (http://www.uni-bonn.de/~uzs159)
|"\ [_ | \| [_   : (http://members.xoom.com/Rene_Schmitz)