[sdiy] Three-Phase VCO

[Scott Stites]

Hey Tim,

Looks cool, indeed!  If you're interested in three phase LFO's, have you
checked out Rene's design?  I've use it - it works very well, indeed.  You
wouldn't even need BBD's to enjoy it - I recall a sample Rene did of
modulating three VCO's with it for a very deep sound.  It responds quite
well to expo VC, also.

Cheerio,
Scott


> Third off, has anybody fiddled with this circuit yet?
>
> http://www.edn.com/article/CA149120.html?spacedesc=designideas
>
> It's basically a voltage-controlled (actually current controlled)
> three-phase sine oscillator with a 1,000 to 1 range.
>
> It's about as simple as something like this is going to get; three U04
> inverters (other inverter types won't work), three caps, six diodes and a
> few resistors. The schematic also shows a PNP transistor used as a VC
> current source. Looks like it could use an expo converter instead on the
> control side. One part I don't understand is the 5V source between Vdd and
> the inverter chain. How exactly would this be wired up? Still, it looks
> interesting. A cheap, three-phase VCLFO could certainly be fun to play
with
> (great for sweeping those three stage Solina-style BBD chorus units we're
> all building... don't tell Harry). What would this sound like as an audio
> osc?
> error, please notify us immediately by e-mail, and delete the original
> message.
>
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