Synchronous refers to the situation when all the interrelated devices has some commen and fixed time relationship. Whereas in Asynchronous refers to the situation when the situation is opposite.
In Synchronous counters all the filp-flops have same clock pulse and in Asynchronous counters flip-flops does not change state at the exaclty same time becasue they don't have common clock pulse.
In Synchronous counters all the filp-flops have same clock pulse and in Asynchronous counters flip-flops does not change state at the exaclty same time becasue they don't have common clock pulse.
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