XOR gate
An XOR logic gate (short for ‘exclusive oR gate’) takes two input signals and
produces an output signal that is 1 if exactly one of the input signals is
1.
In other words, the output will be 1 if the input signals are different from
each other; if both input signals are the same (both 0 or both 1), the
output will be 0.
Truth table
The truth table for it looks like:
| Input A | Input B | Output (A XOR B) |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
Making an XOR gate
An XOR gate can also be said to be ‘A OR B AND NOT (A AND B)’.
This means that you can create an XOR gate by combining OR, AND, and NOT gates together.