An AND gate is a fundamental logic gate in digital electronics that outputs a high signal (1) only when all of its inputs are high (1). If any input is low (0), the output will be low (0).

Key Features of an AND Gate:
- Symbol: Represented by a D-shaped symbol in circuit diagrams.
- Inputs: Can have two or more inputs.
- Output: High (1) only if all inputs are high (1).
- Truth Table: Describes the behavior of the AND gate:
Input A | Input B | Output (A AND B) |
---|---|---|
0 | 0 | 0 |
0 | 1 | 0 |
1 | 0 | 0 |
1 | 1 | 1 |
- Boolean Expression: The output YYY is represented as: Y=A⋅BY = A \cdot BY=A⋅B Where ⋅\cdot⋅ denotes the logical AND operation.
Applications:
- Used in digital circuits to perform logical conjunction.
- Found in microprocessors, computer systems, and control systems.
- Used in decision-making circuits and alarm systems.
The AND gate is a basic building block of digital logic, often combined with other gates like OR and NOT to create complex logic circuits.