2/4 quadrant multiplier theory

[Paul Perry]

At 12:22 PM 2/09/98 -0400, David MOYLAN  wrote:
>Okay, just sitting here thinking about something.
>A 2 quadrant multiplier...snip.......

this is all true.

paul perry melbourne australia

BTW, there is a ckt in Horowitz and Hill 'Art of Electronics'
that shows how to vary the gain of an op amp stage from 1 to -1,
with a pot, which I found VERY HANDY for cv inputs..