The logic gates, truth tables, Boolean expressions and identities, logic circuits, and simplification with Karnaugh maps.
The logic gates
| Gate | Symbol notation | Output is 1 when... |
|---|---|---|
| NOT | Ā | input is 0 |
| AND | A·B | both inputs are 1 |
| OR | A + B | at least one input is 1 |
| NAND | (A·B)̄ | NOT (both 1) |
| NOR | (A + B)̄ | NOT (at least one 1) |
| XOR | A ⊕ B | inputs differ |
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