[sdiy] CA3086 and CA3046?

[jh.]

> That depends on the rest of the circuit - when the output collector of the
> expo runs into a virtual ground node for example, you'd be safe. The
> transistors would never see more than -15volts. But when the collector is
> going to a higher potential, the 20volts for Uceo might be exeeded.

I suspect that's why Tom Oberheim used that strange T-divider instead of
a single resistor for the ref current in the SEM's expo converters.
Normally, virtual GND, but you can never know.

Others were more adventurous. I think ARP has violated the pin13-most-
negative-rule once. And in general, they knew what they were doing:
Some of the most impressive circuits built from 3086 BJT and
4007 MOSFET arrays.

JH.