Intermediate
Digital Logic Design
Q64 / 100
What is the difference between a "ring counter" and a "Johnson counter"?
Correct! Well done.
Incorrect.
The correct answer is A) A ring counter shifts a single "1" bit circularly through its flip-flops, giving N states for N flip-flops; a Johnson (twisted ring) counter feeds back the complement of the last flip-flop, producing 2N distinct states
A
Correct Answer
A ring counter shifts a single "1" bit circularly through its flip-flops, giving N states for N flip-flops; a Johnson (twisted ring) counter feeds back the complement of the last flip-flop, producing 2N distinct states
Explanation
The "twist" (feeding back the inverted output) in a Johnson counter doubles the number of unique states compared to a standard ring counter with the same number of flip-flops, at the cost of slightly more complex output decoding.
Progress
64/100