IC VCO

[Philip]

Hello 
Yes i know that  tube vcos has few parts..........BUT 
does it track 1v/octave and isnt it easy to FRY the whole modular(ok mine isnt much.....)
There are like 150v.......
// Philip 
----- Original Message ----- 
From: "patchell" <patchell at silcom.com>
To: "Philip" <philip.olsson at ktv-sjobo.se>
Cc: "Synth-DIY" <synth-diy at node12b53.a2000.nl>
Sent: Thursday, December 28, 2000 5:32 AM
Subject: Re: IC VCO


> 
> 
> Philip wrote:
> 
> >    Hello!
> > Iam woundering if anyone knows a VCO using lotsa ics.....not many
> > discret component? i have tried to build many vco´s att vero but enden
> > up whit tdesoldering...........
> > the vco should probly have cmoses not some rarechips just common ones
> > and it should not use 2024 and 1v/oct ( notvery kinky)got access to
> > many!
> > and please asap
> > // Olsson
> >
> >
> 
>     The ASM-1 VCO is probably going to have the fewest number of parts,
> for what you get, that is.  The VCO core itself only has 1 opamp, an
> LM311, a couple of caps, a FET, and a handful of resistors.  This VCO is
> very linear, and it is pretty easy to add the other waveforms (although,
> that will add more parts).  An exponential converter can be done with a
> dual transistor (or CA3046), a dual opamp, a handful of resisotors, and
> a +3300ppm temp compensating resistor (or, if you like to experiment,
> other list members have been quite succesful with negative tempco
> resistors, but you have to put it in a differnent place).
> 
>     There are many ways of making a VCO (some people are even doing it
> with tubes now!).  Actually, I think the tube oscilator is probably
> champ right now in the fewest number of components :-)
> 
>     I think you will find they all take a lot of support components.
> Even the old CEM3340 could end up with a fair number of external support
> parts.
> 
> --
>  -Jim
> ------------------------------------------------
> * Visit:http://www.silcom.com/~patchell/
> *-----------------------------------------------
> *If you didn't buy a home in Santa Barbara,
> * You didn't pay enough!
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>