Silicon, Circuits, and the Digital Revolution

Introduction to Digital Logic: OR Gate


A: B: C:
(in) (in) (out)
0 0 0
0 1 1
1 0 1
1 1 1

The OR operation also has the usual logical significance -- the outcome is true if either of the two inputs are true. The symbol for OR looks like the "plus" representing the usual addition of two numbers; note that the truth table looks correct for addition of "0"s and "1"s, except for the last entry.

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Last updated May 4, 2000.
© George Watson, Univ. of Delaware, 2000.