ISRO | ISRO CS 2007 | Question 5

The characteristic equation of an SR flip-flop is given by

(A)

Q_n+1 = S + RQ_n

(B)

Q_n+1= RQ\’_n + SQ_n

(C)

Q_n+1= S\’ + RQ_n

(D)

Q_n+1 = S + R\’Q_n

Answer: (D)

Explanation:

The characteristic table of an SR flip-flop is: So, by simplifying using k-maps: characteristic equation of an SR flip-flop = Q_n+1 = S + R\’Q_n Option(D) is correct.

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