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AP EAMCET201823 Apr 2018Morning ShiftPhysicsSemiconductorsActual

For the combination of logic gates shown in the figure, the equivalent logic gate is

Options

  1. AAND
  2. BNOT
  3. CNAND
  4. DNOR

Correct answer

D. NOR

Step-by-step solution

Y₁=A+B ; Y₂=A+B , as gate 1 and 2 are OR gates. As gate 3 is NAND gate, its output will be aligned Y & = Y₁ Y₂ = Y ₁+ Y ₂= A+B A+B & = A+B + A+B = A+B aligned Using De-Morgan's theorem and identity A+A=A . So, given output is that of NOR gate.

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