[RE: VCDO]

[Karl Helmer Torvmark]

On 7 Apr 1999, Harry Bissell wrote:

> Gentlemen; Check out Linear Technology App note 14:
> Designs for high performance V-F converters (by Jim Williams) How about a 1 Hz
> to 1MHZ V-F converter, .06% linearity, 25ppm/Deg C. gain, 50nV/Deg C zero
> shift, 0-10V input range. You have to add your "Expo converter Du Jour". Other
> designs impressive. Expensive. And probably need a really professional job at
> circuit layout to get even close to that performance. But it's probably a
> better deal than trying to overdrive and audio VCO. No, I haven't tried it
> myself. (Jim Williams is in a league with Bob Pease, thet're just on different
> teams...)  Harry

I've been looking into this myself. Unfortunatly, the Linear parts
specified are hard to get (at least here in Norway). But, I've managed to
scrape together what I need, and I'm planning to make a PCB and test it
when I get the time (I'm swamped with school work just now, so this will
take a while). Nontheless, I think this design looks like just what is
needed for wavetable synthesis and other projects which need a high-speed
oscillator.

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Karl H.