lm13600/700/ne5517-SVF-Problem

[Magnus Danielson]

From: "Hairy Harry" <paia2720 at hotmail.com>
Subject: Re: lm13600/700/ne5517-SVF-Problem
Date: Mon, 07 Aug 2000 21:14:26 GMT

> The old ARIES 317 SVF has an "unusual feedback" arrangement that
> makes the bandpass output degenerate to sort of a 6db/oct LPF at low
> Q settings. This was to get rid of some offset error problems... It uses 
> CA3080 also.

Hohoum! This was an interesting note. While it may not be the solution to all
our problems (No way, Jose!) it is yeat another hint.

> Hmmm... maybe I can find the description in Dennis Colin's own
> words.
> 
> So we are not the first.

Why should we be? ;D

> BTW... how about some slew-rate limit for the CV in ???

Well, good idea, but how about avoiding/reducing the trouble at first and then
see to it that we protect the circuit. If we can make it really unlikely by
propper setup/trimming I think I prefer that than just adding protection which
is really nothing else than papering over the problem.

Cheers,
Magnus