[sdiy] quadrature VCO - a different approach

john mahoney jmahoney at gate.net
Sun May 2 18:49:33 CEST 2004


----- Original Message ----- 
From: "JH."
>
> ... most of my spare time is consumed
> by that big project of building a house now...

Excuses, excuses! ;-)  (Just kidding, of course. That's a huge project.)

Are you doing anything special for your new studio space? Like, no walls at
right angles, etc.?


> ), I wanted to
> make a better QVCO than the first time. Something that tracks as good as
> a normal VCO, and which has lower THD than the first version.

I don't understand your design, JH, so I don't mean to imply that it's not a
good one. (I'd bet dollars-to-donuts that it is.) However...

I'm wondering why you wouldn't use a QuadDCO. Encore Electronics used this
approach for its frequency shifter, and it seems logical to a
computer-friendly guy like myself. We don't always like audio DCOs because
they are so sterile and stable, but those attributes seem like benefits in
this case.
--
john


P.S. I was listening to your CDs during the week, and Holiday in Purgatory
is displacing Dark November as my favorite of the 3. Really nice work.



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