question_answer

For the given digital circuit, write the truth table and identify the logic gate it represents

A)  NAND gate

B)  OR gate      

C)  AND gate     

D)  NOR gate  

Correct Answer: C

Solution :

: The output Y of the circuit is \[Y=\overline{\overline{A}+\overline{B}}=\overline{\overline{A}}.\overline{\overline{B}}=A.B\] It is a Boolean expression for AND gate. Hence the given digital circuit represents the AND gate.