A modulus -12 ring counter requires a minimum of
(A) 10 flip-flops
(B) 12 flip-flops
(C) 8 flip-flops
(D) 6 flip-flops


Answer: (B)

Explanation: A ring counter requires \’n\’ flipflops for \’n\’ number of states. A modulus-12 counter has 12 states starting from 0000 to 1011, atleast 12 bits are required to design a modulus-12 counter.

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