[sdiy] PSPICE models for OTA

[jhaible]

> The LM13600 and 13700 have spice models from National that can be used.
>
> The 3080 is not available, but you can draw your own by following the
> internal schematic.  You MUST use diode connected transistors in places
> where diodes are shown. I used 2N3904 and 2N3906 for the transistor
> types.  The model performance is very typical of the real thing (except
> that offset voltages, etc... are perfect)

I'm using a 13700 model for 3080 circuits is PSpice.
Just make sure that you disable the buffers and the diodes,
and don't let them float.
I normally connect the diode pin to the negative supply, and both,
buffer inputs and outputs, to the positive supply.

JH.