Logic Gates - eclubiitk/EClub-Handbook GitHub Wiki
Logic gates are the basic building blocks of any digital circuit. They are electronic circuits which have one or more inputs and only one output which relates to the input signals based on a certain logic.
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AND Gate
| Input | Output | |
|---|---|---|
| X | Y | Z |
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
AND Gate Truth Table
-
OR Gate
| Input | Output | |
|---|---|---|
| X | Y | Z |
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 1 |
OR Gate Truth Table
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NOT Gate
| Input | Output |
|---|---|
| X | Z |
| 0 | 1 |
| 1 | 0 |
NOT Gate Truth Table
-
NOR Gate
| Input | Output | |
|---|---|---|
| X | Y | Z |
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
NOR Gate Truth Table
-
NAND Gate
| Input | Output | |
|---|---|---|
| X | Y | Z |
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
NAND Gate Truth Table
-
XOR Gate
| Input | Output | |
|---|---|---|
| X | Y | Z |
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
XOR Gate Truth Table
-
XNOR Gate
| Input | Output | |
|---|---|---|
| X | Y | Z |
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
XNOR Gate Truth Table
The NAND (NOT-AND) and NOR (NOT-OR) gates are considered universal gates and can be used to make any other logic gate.
For example : NAND gate can be use to make following gates:
