Logic AND GATE - Truth Table , Properties , Advantage , Disadvantage

In digital electronics, the AND gate is a fundamental logic gate that performs a function similar to multiplying the inputs. It produces a high output (logic 1) only if all the inputs are high (logic 1). If even one input is low (logic 0), the output will also be low (logic 0).

For two-input AND gate, the Boolean expression is given by,

Truth Table of AND Gate:

The truth table of a two input AND gate is given below:

INPUT		OUTPUT
A	B	A.B
0	0	0
0	1	0
1	0	0
1	1	1

AND Gate Operation

We can demonstrate the operation of the AND gate with a simple circuit that has two switches in series as shown in the figure below. You can see that both switches would have to be closed at the same time to light the lamp (view 1). Any other combination of switch positions (view 2) would result in an open circuit and the lamp would not light (logic 0).

Properties of AND Gate:

The following are two main properties of the AND gate:

1. AND gate can accept two or more than two input values at a time.
2. When all of the inputs are logic 1, the output of this gate is logic 1.