Fill the gaps with correct answer. To generate a 16 states timing sequence, Johnson Counter required...

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Question

Fill the gaps with correct answer. To generate a 16 states timing sequence, Johnson Counter required...

Fill the gaps with correct answer.

To generate a 16 states timing sequence,

Johnson Counter required (Answer) flip‐flops and (Answer) AND gates

Ring Counter required (Answer) flip‐flops and (Answer) AND gates

Counter and decoder required (Answer) flip‐flops and (Answer) AND gates

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Answer 1

Answer #1

1. Johnson counter is designed using flip flops with output of the previous flip flop as the input to the next flip fliop and the input to the first flip flop is the inverted output of last flip flop.

For a Johnson counter with N flip flops, there are 2N states.

So for 16 states, 16/2 = 8 flip flops are required and no AND gates are required.

2. Ring counter is designed using flip flops with output of the previous flip as the input to the next flip-flop but now the input to the first flip-flop is just the output of the last flip-flop.

For a ring counter with N flip-flops, there are N states.

So for 16 states, 16 flip-flops are required and no AND gates are required.

3. A counter with N flip-flops produces 2^N states

So for 16 states only 4 flip-flops are required and no and gate is required for asynchronous case.

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Answer 2

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