AW: LM13600 VCO - latest report

[Ian Fritz]

Boy am I glad to hear I'm not the only one to have trouble with the
LM13600 writeup! For example, where exactly is the current path
represented by I_D/2 --> -V_S in Figure 1? Does anybody understand the
derivation for the linearization?

  Ian

jhaible wrote:
> 
> After all, it is not surprising that the original application notes show
> the
> right way to connect the 13700, but its strange that in the explanation
> on their data sheet they operate with current sources, AND I still don't
> know HOW the compensation is optimized with finite (even low) resistor
> values. I mean, the usual Gilbert method is quite clear, a log function
> compensating an expo function, but here ?? I have a feeling that NS
> don't tell us the whole story in the data sheet.
>