What is NAND gate? Write its symbol, truth table and Boolean equation.

Explanation

NAND gate is constructed using the combination of AND gate and the NOT gate.
`therefore AND +NOT = NAND`
This is an AND gate follows by a NOT gate.

The symbol of this gate is shown as in figure (a). The gate have two input and one output.
The truth table of NAND gate is shown in table (b).

Function of NAND gate: The output is equal to .1. when any one input is equal to .0. and the output is equal to .0. when all the inputs are equal to .0..
The Boolean equation of NAND gate is `Y=bar(A*B)` and it is read as "Y is equal to NOT A and B".
NAND gates are also called universal gates since by using the gates you can realise other basic gates like OR, AND and NOT.