Combining gates
Circuit components which take several inputs, compare the inputs with each other, and provide a single output based on logical functions such as AND, OR and NOT. are often combined to create more complex conditions. When this happens, the Data which is sent out of a system. of one gate is connected directly to another gate.
Combining two AND gates
Here, the output Q is 1 (TRUE) only if Data which is inserted into a system for processing and/or storage. C and D are 1 (TRUE). D is only 1 (TRUE) if inputs A and B are 1 (TRUE).
As a A table to list the output for all possible input combinations into a logic gate. this circuit is:
| A | B | C | D = A AND B | Q |
| 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 | 0 |
| 0 | 1 | 0 | 0 | 0 |
| 0 | 1 | 1 | 0 | 0 |
| 1 | 0 | 0 | 0 | 0 |
| 1 | 0 | 1 | 0 | 0 |
| 1 | 1 | 0 | 1 | 0 |
| 1 | 1 | 1 | 1 | 1 |
| A | 0 |
|---|---|
| B | 0 |
| C | 0 |
| D = A AND B | 0 |
| Q | 0 |
| A | 0 |
|---|---|
| B | 0 |
| C | 1 |
| D = A AND B | 0 |
| Q | 0 |
| A | 0 |
|---|---|
| B | 1 |
| C | 0 |
| D = A AND B | 0 |
| Q | 0 |
| A | 0 |
|---|---|
| B | 1 |
| C | 1 |
| D = A AND B | 0 |
| Q | 0 |
| A | 1 |
|---|---|
| B | 0 |
| C | 0 |
| D = A AND B | 0 |
| Q | 0 |
| A | 1 |
|---|---|
| B | 0 |
| C | 1 |
| D = A AND B | 0 |
| Q | 0 |
| A | 1 |
|---|---|
| B | 1 |
| C | 0 |
| D = A AND B | 1 |
| Q | 0 |
| A | 1 |
|---|---|
| B | 1 |
| C | 1 |
| D = A AND B | 1 |
| Q | 1 |
Note: D is not strictly necessary in the table, but it helps in understanding Q.