08-16-2017, 09:45 PM
We have discussed about different types of logic gates in previous articles. Now coming to the topic of this article we are going to discuss about the Universal Gate. AND, NOT and OR gates are the basic gates; we can create any logic gate or any Boolean expression by combining them. Now NOR and NAND gates have the particular property that any one of them can create any logical Boolean expression if designed in a proper way. Now we will look at the operation of each gate separately as universal gates.
NAND gate as Universal Gate
The below diagram is of a two input NAND gate. The first part is an AND gate and second part is a dot after it represents a NOT gate. So it is clear that during the operation of NAND gate, the inputs are first going through AND gate and after that the output is reversed and we get the final output. Now we will look at the truth table of NAND gate.
