Question

How many filp flops are required to implement Johnson counter having 10 states .
A 10
b. 5
c. 20
D. 4
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Answer 1

Answer:

For a mod N counter, the number of flip flops required is less than or equal to 2 raised to power n where n is a positive integer. Hence, For a mod 10 counter, 10< 2^4. So 4 flip-flops are required