SV: Re: SV: [sdiy] QVCO schemo up

Ian Fritz ijfritz at earthlink.net
Sat Nov 12 19:09:53 CET 2005


At 10:12 AM 11/12/05, Anthony Bisset wrote:
>is the schematic on your web site?  sounds useful.

Unfortunately not.  If you have access to the old ENotes it is in #113 p. 7.

Another use for the quad osc might be to make a chaos generator.  Since it 
is a second order system, this would require driving it from an external 
osc.  You could make a simple one-chip osc with a tuning knob and a knob 
for adjustable coupling to the quad osc.

I should have tried this yesterday, while I still had the circuit 
running.  Maybe Harry could try adding this to his spice 
simulation...Harry?...Yoo Hoo...Harry, old buddy...

Another thing to do would be to try adding another integrator to the quad 
osc to get a 3d order filter, plus a three-phase oscillator, plus a 
self-oscillating chaos generator.  (Switchable back to the original system, 
of course.)

Lots of possibilities.

   Ian (trying out the decature osc today) 




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