138真值表
| 輸入 |
輸出 |
||||||||||||
| G1 |
/G2A |
/G2B |
A2 |
A1 |
A0 |
/Y0 |
/Y1 |
/Y2 |
/Y3 |
/Y4 |
/Y5 |
/Y6 |
/Y7 |
| × |
1 |
× |
× |
× |
× |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| × |
× |
1 |
× |
× |
× |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| 0 |
× |
× |
× |
× |
× |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| 1 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| 1 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
| 1 |
0 |
0 |
0 |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
| 1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
1 |
1 |
1 |
| 1 |
0 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
0 |
1 |
1 |
1 |
| 1 |
0 |
0 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
1 |
| 1 |
0 |
0 |
1 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
| 1 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0
|
全加器 真值表
當輸入 Ai Bi Ci 為 001 010 100 111時 So = 1 否則 為 0
當輸入 Ai Bi Ci 為 011 101 110 111時 Co = 1 否則 為 0
A B C 接 A2 A1 A0
So = Y1‘ or Y2’ or Y4‘ or Y7’
Co = Y3’ or Y5’ or Y6’ or Y7’
So = Y1 NAND Y2 or Y4 NAND Y7
= (Y1 NAND Y2) NAND 1 ) NAND ( (Y4 NAND Y7 ) NAND 1 )
Co = (Y3 NAND Y5) NAND 1 ) NAND ( (Y6 NAND Y7 ) NAND 1 )