http://www.allaboutcircuits.com/vol_2/chpt_10/6.html
The text of this page makes reference to inputs A1, A2, A3 and outputs B1, B2, B3 - however, the schematic seems to label the same elements as inputs A1, B1, C1 and outputs A2, B2, C2 respectively - this seems very misleading...
The text of this page makes reference to inputs A1, A2, A3 and outputs B1, B2, B3 - however, the schematic seems to label the same elements as inputs A1, B1, C1 and outputs A2, B2, C2 respectively - this seems very misleading...