[sdiy] Dual Log/Linear Irwin-Gallo VCA

[Tim Parkhurst]

On Fri, Jul 3, 2009 at 12:32 AM, David G. Dixon<dixon at interchange.ubc.ca> wrote:
> I'm very happy to report that my latest module, a dual log/linear VCA based
> on a modified Irwin-Gallo circuit using linearized 2164s, is up and running
> perfectly.  Scope images look exactly like my simulations.
>

Agreed, the 2164 is a great chip. I've designed a VCO around it that
has monster range (400,000:1), and this chip is a big part of the
reason why the Mankato VCF has such a wide frequency range. The 2164
is quiet, cheap, and easy to use.

<self promotion>
Magic Smoke also sells the CoolAudio 2164 chip for $3.50 each (1 or
2), $3.25 ea (2 to 5) or $3.00 ea (6 to 10). If you need 11 or more,
we could probably knock a few more pennies off. :-)
</self promotion>


Tim (always willing to sell a few parts) Servo
-- 
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings