Sequential Circuits

Comparison b/w Synchronous & Asynchronous counters

CircuitThe logic circuit of this type of counters is simple to design and we feed output of one FF to clock of next FFThe circuit diagram for type of counter becomes difficult as number of states increase in the counter
Propagation TimePropagation time delay of this type of counter is :Tpd = N * (Delay of 1 FF)which is quiet highN is number of FFsPropagation time delay of this type of counter is:Tpd = (Delay of 1 FF) + delay of 1 gateInclusion of delay of 1 gate would be illustrated when we design higher counters:
Maximum operating frequencyAnd hence operating frequency is LowAnd hence operating frequency is Higher

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