Digital Electronics/Logic Gates/Combinational Gates

< Digital Electronics < Logic Gates

Combination gates

More than one logic gates can be connected to produce new logic gates

Buffer

Basic Logic Gates Combinational Gates Symbol Mathmatical Formula Truth Table
Buffer Y = is NOT NOT A
Y = A 		A Q
0 0
1 1

NOT Gate

Digital Gate Combinational Gates Symbol Mathematical Expression Truth Table
NOT Gate Y = is NOT A A Y
0 1
1 0

NAND Gate

Digital Gate Combinational Gate Symbol Mathematical Expression Truth Table
Buffer Y = is NOT A.B A B Y
0 0 1
0 1 1
1 0 1
1 1 0

NOR Gate

Digital Gate Combinational Gate Symbol Mathematical Expression Truth Table
NOT Y = is NOT A+B A B Y
0 0 1
0 1 0
1 0 0
1 1 0

XNOR Gate

Basic Gates Combinational Gate Symbol Mathematical Formula Truth Table
NOT Gate Y = is NOT AxorB A B Q
0 0 1
0 1 0
1 0 0
1 1 1
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