[sdiy] THAT 2181C VCA's

[WeAreAs1 at aol.com]

In a message dated 11/3/03 9:24:49 PM, craigc at nwlink.com writes:

<< You can linearize a VCA response by putting a second VCA in feedback loop -

EDN has a short article on doing this with the SSM2164 which also has

exponential response. Tracking is very good, especially if you use two VCAs

on a single chip, but of course you double the number of VCAs you need.


The article may be found here:


http://www.reed-electronics.com/ednmag/index.asp?layout=article&articleid=CA23
3728&rid=0&rme=0&cfd=1 >>

Hello Craig,

Thank you that link.  That's very good info to file away for future 
possibilities.  It's probably possible to adapt the idea to other log-response 
circuits.   I notice that the author of the article is Mike Irwin.  Isn't there a Mike 
Irwin who frequents this list?  I wonder if it's the same guy?

Michael Bacich