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Synchronous Counter

2017-12-23 09:10  
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Synchronous Counter

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Circuit Description:

This circuit is a 4-bitsynchronous counter.

Ripple counters have the disadvantage that not all the bits are updated at the same time; the flip-flops are all using different clocks. Also, a ripple counter cannot run as fast because it takes extra time for the carry to be propagated down the chain of counters.

A synchronous counter solves these problems by using a single clock for all flip-flops, as shown above. Each flip-flop ANDs together the previous bits to determine whether to update.

Credits:Mr. Paul Falstad.

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