NOR gate logic symbol
(a) Logical symbol (b) Waveform
The logical function of the NOR gate is: the input is all 0, the output is 1; as long as one input is 1, the output is 0. The NOR truth table is shown in the table.
Table 8-5 OR gate truth table
A
B
Y
0
0
1
0
1
0
1
0
0
1
1
0
The logical function of the NOR gate is described by a logical expression:
A NOR gate can also have two or more inputs.
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