What is NOR gate? Write its symbol, truth table and Boolean equation.

Explanation

The NOR gate is constructed by combining the OR gate and the NOT gate.
`therefore OR +NOT=NOR`
Here, the output of the OR gate is given as input to the NOT gate.

The symbol of NCR gate is shown in figure (a).
It has two or more inputs and one output.

Function of NOR gate: "The output is .0. whenever the input is .1. and whenever all the input are .0. the output is equal to .1..
Boolean eqution of NOR gate is `Y=bar(A+B)`. It is read as "Y is equal to NOT A or B".
The truth table of the NOR gte is shown in table (b).

NOR gates are also called universal gates since by using the gates one can realise other basic gates like OR, AND and NOT.