Digital Electronics/Logic Gates/Combinational Gates
Combination gates
[edit | edit source]More than one logic gates can be connected to produce new logic gates
Buffer
[edit | edit source]Basic Logic Gates Combinational Gates Symbol Mathmatical Formula Truth Table Buffer 
Y = is NOT NOT A
Y = AA Q
0 0
1 1
NOT Gate
[edit | edit source]Digital Gate Combinational Gates Symbol Mathematical Expression Truth Table NOT Gate Y = is NOT A A Y
0 1
1 0
NAND Gate
[edit | edit source]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
[edit | edit source]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
[edit | edit source]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
