Sequential circuits

Question 41

The number of flip-flops required to design a modulo - 272 counter is:

• 8

• 9

• 27

• 11

Question 42

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

• Q_n+1 = S + RQ_n

• Q_n+1= RQ\'_n + SQ_n

• Q_n+1= S\' + RQ_n

• Q_n+1 = S + R\'Q_n

Question 43

In an SR latch made by cross-coupling two NAND gates, if both S and R inputs are set to 0, then it will result in

• Q = 0, Q\' = 1

• Q = 1, Q\' = 0

• Q = 1, Q\' = 1

• Indeterminate states

Question 44

Ring counter is analogous to

• Toggle Switch

• Latch

• Stepping Switch

• S-R flip flop

Question 45

In RS flip-flop, the output of the flip-flop at time (t+1) is same as the output at time t, after the occurrence of a clock pulse if:

• S=R=1

• S=0, R=1

• S=1, R=0

• S=R=0

Question 46

What does the following logic diagram represent?

• Synchronous Counter

• Ripple Counter

• Combinational Circuit

• Mod 2 Counter