AND Gate
The AND gate is used to indicate that the output occurs if and only if all the input events occur. Logically, there must be at least two input events to an AND gate. However, the FTA module does not force this to be the case.
Summary of Logic
All events must be TRUE for the output to be TRUE.
A truth table for the AND gate follows. The Boolean equation for an AND gate is T = A * B.
|
A
|
B
|
Output
|
|---|---|---|
|
T
|
T
|
T
|
|
T
|
F
|
F
|
|
F
|
T
|
F
|
|
F
|
F
|
F
|
Example
A compact disc (CD) player can be powered by batteries or electrical power. The CD player fails to operate if the batteries are dead AND no electrical power source is available.
