OR GateThe OR gate is used to indicate that the output occurs if and only if at least one of the input events occur. The output of an OR gate can be the top event or any intermediate event. The input events can be basic events, intermediate events or a combination of both. There should be at least two inputs to an OR gate.
Logic Sumamry
If at least one event is true (T), the output is true (T). If all events are false (F), then the output is false (F). Table 5-2 shows example input and output events for an OR gate with two inputs.
Input A | Input B | Output |
|---|---|---|
T | T | T |
T | F | T |
F | T | T |
F | F | F |