What do you understand by logic gate? Why is it so called? State the type of gates.

Explanation

Logic gate. A digital circuit or electronic circuit which either allows a signal to pass through it or stops it, is called a gate. A gate which allows the signal to pass through it when some logical condition are satisified is called a logic gate. It means, for a logic gate there is a certain logical relationship between input and output voltages. The basic logic gates are of three types : 1. OR gate2. AND gate and 3. NOT gate