Explain the operation and truth table of a 4-in... - SS2 Physics Electronics Question
Explain the operation and truth table of a 4-input NAND gate. Provide an example of a practical application where a 4-input NAND gate can be used.
A 4-input NAND gate is a logic gate that produces an output of logic level 0 (LOW) only when all of its inputs are at logic level 1 (HIGH). The truth table for a 4-input NAND gate is as follows:
|
A |
B |
C |
D |
Y |
|
0 |
0 |
0 |
0 |
1 |
|
0 |
0 |
0 |
1 |
1 |
|
0 |
0 |
1 |
0 |
1 |
|
0 |
0 |
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
0 |
One practical application of a 4-input NAND gate is in digital circuits where the output should be HIGH only when multiple conditions are met simultaneously. For example, in a security system, if multiple sensors need to be triggered for an alarm to activate, a 4-input NAND gate can be used to combine the sensor outputs. The alarm will sound only when all the sensors detect an intrusion.
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