On Wed, 28 Feb 2018 06:32:58 +0000
Andre <an...@lanoe.net> wrote:

> Can you make use of an LM3900? I have one here *somewhere*.
> I think its a quad Norton, not sure how long its been there for.

Theoretically yes, in practice you are better off using an opamp
that is not 40 years old and not as quirky as a Norton opamp.
You can buy standard bipolar opamps that beat those old beats
at all metrics, and they only cost little more, if at all.

The only place where these beasts really excell is that the
inputs are basically independent of the supply voltage, given
the maximum input current is not exceeded. Linear has a few
opamps that can do the same trick (though in a slightly different
manner), but they also cost a bit more.

                        Attila Kinali

<JaberWorky>    The bad part of Zurich is where the degenerates
                throw DARK chocolate at you.
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