LM13600 VCOs in Spec Sheet

[Joachim Verghese]

On Fri, 29 Sep 1995 chordman at ix.netcom.com wrote:

> I have the spec pages for the LM13600 and there are several VCOs.  They 
> look linear from the math, which is what I need.
> 
> Have any of you played with these circuits?

I have played with them, but that was almost 15 years ago. The only
thing I remember was that the VCO drifted a lot. As can be seen from
the design equations, the transconductance is heavily dependent on
temperature, even without an exponential converter.

For serious VCOs I'd recommend the Electronotes designs, or discrete
types such as those in the Odyssey, SEM or Prodigy.

-joachim