[sdiy] function generation

[Oren Leavitt]

I am planning to try out Tom's 8038 design, too, for some additional 
non-critical VCOs.
I'll let you all know how it works out for me as well.
I'd also like to try that hack from Electronotes that suggested feeding 
a constant current source into the symmetry pins 4 & 5 - anybody have 
experience with that?
Running the 8038 single ended off of one rail instead of +/-15 does make 
alot of difference in heat generation - it barely gets warm when run on 
one rail. One oddity with the 8038 is that you have to push the control 
voltage slightly above Vcc to realize a decent sweep range - Tom's 
design does seem to address that as well as invert it so that freq rises 
with voltage as we're used to.

Oren

WeAreAs1 at aol.com wrote:

>In a message dated 11/8/03 11:48:48 AM, music.maker at gte.net writes:
>
><< Wow, that's in interesting circuit.  I will just have to give it a try, 
>I'd always assumed that the
>8038 was hopelessly nonlinear, but Tom's control voltage technique apparently 
>linearizes this bad
>boy chip. >>
>
>Hello Scott,
>
>If you do try building that design, please keep us informed on the results, 
>OK?
>
>Michael Bacich
>
>  
>

-- 
Oren Leavitt
oleavitt at ix.netcom.com