Macam – macam gerbang logika :
1. Gerbang AND (A.B)
“output akan bernilai ‘1’ jika kedua inputnya ‘1’ “
Table kebenaran(truth table)
A
|
B
|
Q
|
0
|
0
|
0
|
0
|
1
|
0
|
1
|
0
|
0
|
1
|
1
|
1
|
“output akan berbilai ‘1’ jika salah satu inputnya bernilai ‘1’ “
Tabel kebenaran
A
|
B
|
Q
|
0
|
0
|
0
|
0
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
1
|
3. Gerbang NOT (Inverter) (Ā)
“output akan selalu berlawanan dngan inputnya”
Table kebenaran
A
|
Q
|
0
|
1
|
1
|
0
|
4. Gerbang NAND (NOT AND) (Ā.B͞)
“outputnya akan bernilai ‘0’ jika kedua inputnya ‘1’ “
Table
A
|
B
|
Q
|
0
|
0
|
1
|
0
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
0
|
5. Gerbang NOR (Ā +B͞)
“outpunya akan bernilai ‘1’ jika kedua inputnya bernilai ‘0’ “
Table
A
|
B
|
A+B
|
0
|
0
|
1
|
0
|
1
|
0
|
1
|
0
|
0
|
1
|
1
|
0
|
6. Gerbang XOR (Exclusive OR) (Ā.B+A.B͞)
“outputnya akan bernilai ‘1’ jika inputnya berbeda “
Table
A
|
B
|
Q
|
0
|
0
|
0
|
0
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
0
|
A
|
B
|
Ā
|
B͞
|
Ā.B
|
A.B͞
|
Ā.B+ A.B͞
|
0
|
0
|
1
|
1
|
0
|
0
|
0
|
0
|
1
|
1
|
0
|
1
|
0
|
1
|
1
|
0
|
0
|
1
|
0
|
1
|
1
|
1
|
1
|
0
|
0
|
0
|
0
|
0
|
7. Gerbang XNOR (Exclusive NOR)
 | |||
“ outputnya akan bernilai ‘1’ jika inputnya sama “
Table
A
|
B
|
Q
|
0
|
0
|
1
|
0
|
1
|
0
|
1
|
0
|
0
|
1
|
1
|
1
|
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