Question

Write the Boolean expressions for NAND Gate.

Answer 1

It is a circuit with two or more inputs and one output, whose output is high if any one or more of the inputs is low; the output is low if all the inputs are high.

Logic symbol:

Boolean expression: Y = `bar("A"*"B")`

Truth table:

Inputs		Output Y
A	B
0	0	1
1	0	1
0	1	1
1	1	0

The NAND gate is a combination of an AND gate followed by a NOT gate so that the truth table of the NAND function is obtained by inverting the outputs of the AND gate.