Logic Gates -

Three original gates are the base in which four more gates are derived. These original gates are named; AND, OR, and NOT.

AND = Based on a true ("true" equals boolean value 1) statement, both A and B must be "true" (1), otherwise the statement is false ("false" equals boolean value 0), or zero.

OR = Again, based on the truth (1), either A or B can be true to have a "true" statement.

NOT = Same as saying "inverse".

The gates derived from these three are called; NAND, NOR, XOR, and XNOR.

NAND = Inverse of AND; NOR = Inverse of OR; XOR = Exclusive OR (one or the other, not both true); XNOR = Inverse of XOR.

**All seven gates listed above, along with their truth tables, can be seen by clicking on the web site below.