Toggle the inputs on the left and watch how the output Q changes.
Do you see the link between A and B and the output?
Do you understand the truth table below each gate?
Toggle the inputs and outputs for each gate MULTIPLE TIMES until you are confident in how it works
and how it is different to the previous gates you have looked at.
NOT after AND — output is 0 only when both inputs are 1.
| Input A | Input B | Output Q |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
NOT after OR — output is 1 only when both inputs are 0.
| Input A | Input B | Output Q |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
Exclusive OR — output is 1 only when the inputs are different.
| Input A | Input B | Output Q |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |