GATE | GATE-CS-2002 | Question 50
Consider the following logic circuit whose inputs and function and output is f.
f1(dx, y, z) = ∑(0, 1, 3, 5),
f2(dx, y, z) = ∑(6, 7) and
f(dx, y, z) = ∑(1, 4, 5),
f3 is :
(A) ∑(1, 4, 5)
(B) ∑(6, 7)
(C) ∑(0, 1, 3, 5)
(D) None of these
Explanation: Function f will be:
f = ((f1f2)′(f3)')′ = (f1f2) + f3
Since AND of two expressions will contain the common terms and f1 and f2 don’t have any common term, so f1f2 is 0 and hence f = f3 = Σ(1,4,5).
Option (A) is correct.
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