[sdiy] Tempcos (was:SSM2044 Filter schematic??)

[James Patchell]

If you want a voltage reference that produces a voltage proportional to 
temp, a Band Gap Reference is you best bet....I have used this technique to 
compensate for expo temp scale drift myself.

At 08:37 PM 5/21/2004 +0200, ASSI wrote:
>On Friday 21 May 2004 01:29, Paul Perry wrote:
> > harrybissell said:
> > >'might' as well.  These are usually +3000 ppm or +3500 ppm... and a
> > > lot less expensive
> >
> > Copper wire has a tempco of 3800 to 3900 ppm, I believe, if people
> > want to 'roll their own' :D
>
>The tables I have all show 3900ppm for copper and platinum, 4100ppm for
>silver, 4800ppm for tungsten and 3600ppm for AlMgSi ("Aldrey").
>CuZn15...30 alloy come in at 1800ppm, other alloys with up to 2400ppm
>are also available, but probably not as wire.
>
>If all you need is a 3350ppm reference voltage, you can also try a
>Z-Diode around 9.6V.
>
>
>Achim.
>--
>+<[Q+ Matrix-12 WAVE#46 microQkb/Omega Andromeda XTk/30 sonic heaven]>+
>
>SD adaptation for Waldorf microQ V2.22R2:
>http://homepages.compuserve.de/Stromeko#WaldorfSDada

         -Jim
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