At 11:52 PM 2/05/98 -0400, you wrote: >Hi all > >Just a quick question... What's a "Norton" op-amp ....a norton op amp has current, not voltage, inputs. The commonest is the LM3900 quad Norton. and why does my Octave >Cat have 4 of them? ....because they are VERY CHEAP (true.. to this day) There is nothing wrong with this. > paul perry melbourne australia