[sdiy] 1-2-4 !

[jbv]

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
terms of the differences in the signal...
I've already done some google search, but haven't
really find anything that could help me approach the
problem as a whole...

Thanks,
JB