Q.
Four NOR gates are connected as shown in figure. The truth table for the given figure is :
Solution:
$y =\overline{\overline{ A +\overline{ A + B })}+\overline{ B +\overline{ A + B }}}$
$y =( A +\overline{ A + B }) \cdot( B +\overline{ A + B })$
A
B
Y
0
0
1
0
1
0
1
0
0
1
1
1
| A | B | Y |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |