Mouser's name for a MAT-02
Magnus Danielson
cfmd at swipnet.se
Sat Jan 13 22:11:26 CET 2001
From: "Ian Fritz" <ijfritz at earthlink.net>
Subject: Re: Mouser's name for a MAT-02
Date: Sat, 13 Jan 2001 13:33:10 -0700
>
> ----- Original Message -----
> From: "Magnus Danielson" <cfmd at swipnet.se>
>
> >
> > Thing is, most expo-converters does not compensate for the bulk
> resistance.
> >
> > I haven't dug into the details of bulk resistance compensation myself,
> > but maybe somebody och something will kick my lazy but to go and do
> > the reading and theory exercises.
> >
> > Now, is there a simple mod on a standard converter?
> >
>
> It just takes a diode and a trimpot. See any of the VCO's at my site. For
> example the second figure at
>
> http://home.earthlink.net/~ijfritz/sy_cir4.htm
But isn't the text incorrect?
It says "the the D1-R14 feedback path"
Drop one "the" and change R14 into R13.
The downside of that solution is the need of an diode which needs to
sit at the same temperature as the expo-core transistors. In your
solution it doesn't really care, since you use a CA3083.
I see a diffrent solution in my ol' PMI databook (hm, what did I just
say about those?) where they basically only adds a resistor to the
base but to ground.
Anyway, I'll have a look at both.
Cheers,
Magnus
More information about the Synth-diy
mailing list