Descreet OTA from CA3096

[jhaible]

> It's a basic building block, and with two CA3096 arrays you can build all
> these things and many others. 

Another thing I wanted to try but didn't find the time yet. Can you tell us
about the performance of the 3096-based version ? Offset variation
over Iabc in particular? I mean, are the pnp's good enough to form 
a precise current mirror that keeps its symmetry over several decades ?

JH.