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Q. Four NOR gates are connected as shown in figure. The truth table for the given figure is :Physics Question Image

JEE MainJEE Main 2021Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

image
$y =\overline{\overline{ A +\overline{ A + B })}+\overline{ B +\overline{ A + B }}}$
$y =( A +\overline{ A + B }) \cdot( B +\overline{ A + B })$
A B Y
0 0 1
0 1 0
1 0 0
1 1 1