[sdiy] WP LM3900 VCF

[Ian Fritz]

At 07:05 AM 1/14/06, JH. wrote:


>In fact, there has been an integrated quad opamp with
>variable biasing and internal compensation, the LM346,
>which has been used as a 4pole "OTA" VCF in Farfisa
>synthesizers.

Thanks for bringing that up.  I see that it is still in production from 
several manufacturers. Costs $.45 or so at Digikey.

   Ian