NOR Gate

The output of the NOR gate is a 1 if both inputs are 0 but a 0 if one or the other or both the inputs are 1.

A B C

0
0
1
1 0
1
0
1 1
0
0
0

Truth Table

Note: The NOR is like an OR gate combined with a NOT gate.

Click on the inputs to see how changing their logic state affects the output. All the possibilities are shown in the table called a 'Truth Table'.