[sdiy] exponential vs linear vco cores

[jays at aracnet.com]

David,

Several quesions if you don't mind. Thanks!

If I remember right you need to get a magic voltage good to 3 digits (down to mV) for your expo to work right.

Is this voltage used for the expo converter or the temp comp for the expo converter?

How hard is it to get that tweaked in for proper operation with cheap test equipment (in this case for me cheap means < $50 DVM)?

Thanks
Jay S.

David G. Dixon wrote:

> 
> > Tempco class discussion based on Rene's website, with a side note that if
> > you really want to go down the rabbit hole, you should check out Ian
> > Fritz's website.
> 
> Didn't want to go down the hole, or even near the hole.  That's why the
> 2164-based approach was so appealing to me.  No gluing of expensive and hard
> to find parts (tempcos) to other expensive and hard to find parts
> (super-matched pairs)!
> 
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