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Question: Answered & Verified by Expert
In the given circuit P and Q form the inputs. The output Y is

PhysicsSemiconductorsNEET
Options:
  • A Y= P ¯
  • B Y=P Q ¯
  • C Y=P+Q
  • D Y= Q ¯
Solution:
2598 Upvotes Verified Answer
The correct answer is: Y= Q ¯
From the given circuit, the output Y is

Y= ( P ¯ +Q )( P+Q ) ¯

Y= P ¯ ⋅P+ P ¯ Q+Q⋅P+Q⋅Q ¯

Y= Q+PQ+ P ¯ Q ¯ ( ∵ P ¯ ⋅P=0 )

Y= Q( 1+P+ P ¯ ) ¯ ( ∵1+A=1 )

Y= Q ¯

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