[sdiy] Any LM331 experts around?

[Ian Fritz]

At 10:08 PM 4/13/2008, Paul Perry wrote:
>My guess - and it is only a guess - is that it puts a little non-linearity
>in the F/V curve, to compensate for a little gap when switching occurs.
>Like the high end freq tweak seen in many synth VCOs.

The reason I'm puzzled is that pin 2 is a dc bias point, so I'm not seeing 
a frequency dependence there.

I made a homebrew charge balance VCO and compensated a bit of HF droop with 
a small resistor in series with the integrating cap.  This kind of VCO is 
amazing.  Too bad the quasi-saw output isn't nicer.

   Ian