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Difference Between Synchronous and Asynchronous Counter

 


Basis for ComparisonSynchronous CounterAsynchronous Counter
Also calledParallel CounterSerial Counter
Principle of operationEach flip flop is triggered with same clock signal at the same time.Each flip flop is triggered with different clock signal at different instant of time.
Decoding errorsNot producedProduced
Operating speedFastComparatively slow
DesignComplexSimple
Delay in signal propagationVery LowComparatively high
Count sequenceNot FixedFixed
Response to clock signalEach flip-flop changes its state simultaneously.There is no simultaneous change in the state of all flip flops with change in clock input.
Overall settling timeMaximum settling time out of the settling time of each flip flop in the configuration.Summation of settling time of each individual flip-flop.
Flip-flop direct interconnectionNot ExistExist
ApplicationsIn moving machine controlling, alarms clocks, multiplexing circuits, etc.In ring and johnson counters, frequency dividers, etc.



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