Electronotes and Synth-DIY CD

[Haible Juergen]

Hi Terry,

thanks a lot for clarification, both the circuit details and your name.
So without having the circuit in front of me, as I see it it boils down to
two important parts of the VCO:

Using an inverting opamp integrator (rather than capacitor + high
impedance follower), and
Using a FET for discharge rathe rthan a BJT.

Which is quite impressive indeed - I used to think one of the big
synth companies had introduced that. So the rather have all
copied that.
Just out of curiosity: Did you get any royalties from anybody, and did 
you have protected the circuit in any form ?

Best Regards,
and proud to have you here on synth-diy  8-)

JH.