Tim,

excellent work. Sounds very interesting - especially as the circuit
obviously does not need a power supply. Maybe we could built a small pc
board that can be added to the A-110 (provided that we get the permission
from you). Only three wires are needed (tri input, sine output, GND).
Another solution would be a modification of the small output board of the
A-110 (adding the additional parts to this board).

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von Tim Stinchcombe
> Gesendet: Mittwoch, 20. September 2006 23:28
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 Possible A-110 mod for better sinewaves
>
>
> Hi list,
>
> After the recent thread about the 'purity' of the sinewaves from the A-
> 110, I started looking at how these could possibly be improved. I came
> across a simple conversion circuit, not that much more complicated than
> what is in there at the moment, and when I breadboarded it, I was
> stunned at just how good the sine waves from it are - I have created a
> new page at my website with a couple of scope traces:
>
> http://mysite.wanadoo-
> members.co.uk/tstinchcombe/synth/invest/invest.html
>
> (watch the line-wrap there!).
>
> I'm in the process of seeing how feasible it might be to actually
> modify an A-110 to incorporate the extra bits 'n bobs to do this. (I
> also want to get the original paper of the circuit, so that I can check
> that the component values are 'optimal'!)
>
> Tim
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> Yahoo! Groups Links
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