Digital Electronics/Logic Gates/Fundamental Digital Gates

Digital Gates

Digital gate is a Digital Device used to perform the logic operation on the input(s) to produce an equivalent logic in the output. The output produced from the inputs are listed in a table called a Truth table. The relation between output and inputs can also be represented by a mathematic equation .

There are 5 basic digital gates used to perform Logic Operation namely Buffer, NOT, AND, OR, XOR

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Basic Logic Gates	Symbol	Mathmatical Formula	Truth Table
Buffer		Q = A	A Q 0 0 1 1
NOT		Q = NOT A	A Q 0 1 1 0
AND		Q = A . B	A B Q 0 0 0 0 1 0 1 0 0 1 1 1
OR		Q = A + B	A B Q 0 0 0 0 1 1 1 0 1 1 1 1
XOR		Q = A (+) B	A B Q 0 0 0 0 1 1 1 0 1 1 1 0