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Logic gates perform basic logical functions and are the fundamental building blocks of digital integrated circuits.
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A logic gate is an elementary building block of a digital circuit. Mostlogic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels.

A logic gate might sound horribly complex, but it's simply an electric circuit with two inputs and an output. It receives two incoming electric currents, compares them, and sends on a new, outgoing electric current depending on what it finds. A logic gate is a bit like a doorman or bouncer who is allowed to let people into a nightclub only if they pass certain tests. There are quite a few different types of logic gate, the most common of which are called AND, OR, NOT, XOR (Exclusive Or), NAND (NOT AND), and NOR (NOT OR)

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Logic gate: is a building element of the circuit. which has two inputs A and B and output Z.

Different types of gates such as AND, OR, NOR, XOR, NAND, NOT etc. uses the Logic gate for there implementation.

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