[sdiy] very simple VCA circuit

[Tom Wiltshire]

On 27 Jan 2011, at 13:26, Harry Bissell wrote:

> why not the CA3080 of LM13600/700 ?  
> OTA have reasonably low component count, good to very good performance.

Sorry, but I can't accept this w.r.t. the CA3080. That chip doesn't do anything that I'd qualify as "good performance". If you're lucky, it'll stretch to "acceptable performance". Mostly it's noisy with obvious feedthrough.

Still, it probably compares pretty favourably to the one-transistor VCA that Justin suggested, though I've never tried that. And I do agree with Harry that the question is "how good does the VCA need to be?".

T.