## AND Gate (MA166E)

- Details
- Published: Tuesday, 16 February 2016 00:00
- Written by Newton C. Braga

The output of an AND gate is in the high logic level only IF either input (A or B) is in the high logic level. Figure 1 shows the symbol of an AND gate and the equivalent circuits.

**Equation 1 **

2-Input AND Gate

X = A.B

Where:

X is the output logic level

A and B are the input logic level

**Truth Table **

A |
B |
X |

0 | 0 | 0 |

0 | 1 | 0 |

1 | 0 | 0 |

1 | 1 | 1 |

**Equation 2 **

**3-Input AND Gate **

X = A.B.C

Where:

X is the output logic level

A, B, C are the input logic level

**Truth Table**