[sdiy] Any LM331 experts around?

[Paul Perry]

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.

Paul perry Melbourne Australia

-----Original Message-----
On Behalf Of Ian Fritz


I'm looking at the LM331 data sheet and can't figure out what the 
transistor in Fig. 4 is for.  They just say that Fig. 3 has been modified 
for high freq operation.  Any expertise or ideas?  Something to do with 
startup?