NOR Gate
The NOR gate functions like a combination of an OR gate and a NOT gate. The NOR gate is used to indicate that the output occurs when all of the input events are absent.
Summary of Logic:
If there is at least one TRUE input event, the output is FALSE.
A truth table for a NOR gate follows. The Boolean equation for a NOR gate is T = ~(A + B) = (~A) * (~B).
A | B | Output |
|---|---|---|
T | T | F |
T | F | F |
F | T | F |
F | F | T |
Example
Generator 1 and Generator 2 must both operate to supply adequate power to the system. If either generator fails, not enough power is supplied.
