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JEE Main 2020 (6 Sep, Shift 1) · Logic Gates

Logic Gates question from JEE Main 2020 (6 Sep, Shift 1)

Q142JEE Main 2020 · 6 SEP · SHIFT 1Medium

Logic Gates

Identify the correct output signal Y in the given combination of gates (as shown) for the given inputs A and B.

Figure

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Answer: (d)

  1. Y=Aˉ⋅Bˉ‾=A+BY = \overline{\bar{A} \cdot \bar{B}} = A + B, an OR gate.
  2. So YY is high whenever either AA or BB is high.
  3. B is high during 0–7.5, 10–15 and 17.5–22.5, and every A pulse lies inside these intervals, so YY follows these intervals.
  4. So the answer is (d).
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