[sdiy] Any noise avantage to parallel 2164 VCAs?

Neil Johnson neil.johnson71 at gmail.com
Mon Jun 18 00:03:24 CEST 2018


Hi,

Tom Wiltshire wrote:
> I once experimented with a 2164-based SVF to see if I could improve the high frequency performance. One of the things I tried was reducing the input resistors to 15K to run the filter hotter, and it seemed to work out. So I wouldn’t describe 30k as “maxing out the input capability”. At least, it didn’t seem that way when I tried it.

You can certainly run with lower input resistors, but you need to
adjust the compensation circuit to match, otherwise you'll find that
at high input amplitudes the gain cell can become unstable and
overshoot.

Neil
-- 
http://www.njohnson.co.uk




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