[sdiy] 1-2-4 !

[Paul Perry]

At 02:31 PM 17/04/04 +0200, you wrote:
>Hi,
>
>Could someone be kind enough to point me to a
>web page or article explaining the differences
>between 1, 2 and 4 quadrant multiplier, not so much
>in terms of maths (mine are really poor), but also in

A one quadrant multiplier operates only on signals from say 0v to 10v
for both x and y.

A two quadrant multiplier works on signales of for example -10 to +10 for X, 
and 0 to +10 for Y.

And a 4 quadrant multiplier accepts inputs from for example -10 to +10 
both for x and for y.

Think of a graph with the x and y axis making four "quadrants",
the one quadrant multiplier works in the quadrant where all the voltages 
are positive, and so on.

paul perry Melbourne Australia