Logical OR Gate

OR gate performs logical OR operation which means outputs is logical 1 if at least one of the inputs is 1. Just like AND gate an OR gate may also have two or any more numbers of inputs but only one output. Only if all of the inputs are only in low state or logical 0 the output is low or 0 and in all other inputs conditions the output will be high or logical 1.The logical symbol of OR gate is shown below,

Truth Table of OR Gate

From above explanation the truth table of logical OR gate can be represented as, Logical OR gate can be of more than two inputs as we told earlier. In that case logical symbol and truth table would be,

Realization of OR Gate

Like AND gate and OR gate can also be realized by using Diode or transistor circuit.