Self Doubt

Question

What is the difference between synchronous series counter and synchronous parallel counter? I searched everywhere but nowhere found any term like "synchronous series counter" . What i found was that the synchronous counter is known as parallel counter. If this is true, then how is the following question solved? Please help.

https://gateoverflow.in/86195/me-test

Comments

synchronous series counter is different than synchronous parallel counter.

synchronous series counter  :- T_{input_clock} ≥ T_{pd of flipflop} + (n-2) T_{pd of AND gate} .

synchronous parallel counter  :- T_{input_clock} ≥ T_{pd of flipflop} +  T_{pd of AND gate} .

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@Shaik Masthan Why are we considering only (n-2) AND gates delay,Can you show a rough diagram of the circuit Arrangement because nothing is mentioned ,whether it is up counter or down counter and in the answer it has been referred from up counter.

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in the diagram, T_count means  T_{input_clock}

 

whether it is up counter or down counter

No problem with this, it may up counter or down counter. 

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@Shaik Masthan ,Thank you for sharing the images.It was really helpful.