[sdiy] OTA to voltage-control resonance?

[David G. Dixon]

> If you truly want to eliminate the distortion (while keeping the SNR
> same), you can either use the linearizing diodes or use the other half
> inside opamp feedback loop to pre-distort the signal. The tanh shape is
> applied before multiplying by Ictrl. Hence the second half can be run with
> constant gain and as long as the same signal is applied to inputs of both
> halves, the distortion should be cancelled.

Antti, can you point the dummies on the list (like me) to a decent source of
information about OTAs which would help us to understand the statements you
have made in the preceding paragraph?  The LM13700 datasheet simply isn't
doing it for me.

Thanks in advance!