VCO temp compensation ideas

[The Dark force of dance]

Y-ellow Y'all.
At 08:35 PM 10/23/97 +0200, Rene Schmitz wrote:
>Hi all!
>
>During the last days I thought about temperature compensating VCOs.
>There are several methods which all have drawbacks, such as the 
>heating of the diff pair, which uses a "high" current, or the
>tempco resistor which only reduces the temperature coefficient.
>(3300ppm/K vs. 3500ppm/K, 200ppm remaining) 

What's wrong with using the age old, tried and tested method of whacking in
a thermistor and trimming it down? I know that people have said they don't
like using thermistors because of cost but considering all these other
methods seem at least twice as expensive, I'm just curious as to why no-one
is using them?

Hope this helps.

Be absolutely ICebox.
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