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The difference between synchronous and asynchronous counter.
|SN||Synchronous Counter||Asynchronous Counter|
|1.||In synchronous counter, all flip flops are triggered with same clock simultaneously.||In asynchronous counter, different flip flops are triggered with different clock, not simultaneously.|
|2.||Synchronous Counter is faster than asynchronous counter in operation.||Asynchronous Counter is slower than synchronous counter in operation.|
|3.||Synchronous Counter does not produce any decoding errors.||Asynchronous Counter produces decoding error.|
|4.||Synchronous Counter is also called Parallel Counter.||Asynchronous Counter is also called Serial Counter.|
|5.||Synchronous Counter designing as well implementation are complex due to increasing the number of states.||Asynchronous Counter designing as well as implementation is very easy.|
|6.||Synchronous Counter will operate in any desired count sequence.||Asynchronous Counter will operate only in fixed count sequence (UP/DOWN).|
|7.||Synchronous Counter examples are: Ring counter, Johnson counter.||Asynchronous Counter examples are: Ripple UP counter, Ripple DOWN counter.|
|8.||In synchronous counter, propagation delay is less.||In asynchronous counter, there is high propagation delay.|
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