Question

The output of the given logic circuit is :

• A. $\bar{A}B$
• B. $A\bar{B}$
• C. $AB+\overline{AB}$
• D. $A\bar{B}+\bar{A}B$

Answer 1

Answer: (B)

$Y=\overline{\left(\bar{A}+\bar{B}\right)\bar{A}}$
$=\overline{\bar{A}+\bar{A}B}$
$=A\left(\overline{\bar{A}B}\right)$
$=A+A\bar{B}=A\bar{B}$