Digital Electronics/Logic Gates Summary

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The table below summarize all the Basic Digital Gates and their characteristics

Basic Logic Gates Symbol Mathmatical Formula Truth Table Constructions
Buffer Buffer ANSI Labelled.svg Q = A A Q
0 0
1 1
NOT NOT ANSI Labelled.svg Q = NOT A A Q
0 1
1 0
AND AND Gate Q = A . B A B Q
0 0 0
0 1 0
1 0 0
1 1 1
NAND AND Gate Q =NOT (A . B) A B Q
0 0 1
0 1 1
1 0 1
1 1 0
OR Logic-gate-or-us.png Q = A + B A B Q
0 0 0
0 1 1
1 0 1
1 1 1
NOR Logic-gate-or-us.png Q = NOT (A + B) A B Q
0 0 1
0 1 0
1 0 0
1 1 0
XOR XOR ANSI Labelled.svg Q = A + B A B Q
0 0 0
0 1 1
1 0 1
1 1 0
XNOR XNOR ANSI Labelled.svg Q = A + B A B Q
0 0 0
0 1 1
1 0 1
1 1 1