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NEET 2010 (AIPMT, Mains) · Logic Gates

Logic Gates question from NEET 2010 (AIPMT, Mains)

Q171NEET 2010 · AIPMT · MAINSEasy

Logic Gates

The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveforms of A, B and Y are as given.

The logic gate is

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Answer: (d)

Compare $Y$ with $A$ and $B$ in each time interval.
$Y$ goes LOW only in the interval where both $A$ and $B$ are HIGH; in every other interval $Y$ is HIGH.
That is $Y = \overline{A \cdot B}$ .
So the answer is (d) NAND gate.

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