This circuit is a 4-bit synchronous counter. The drawback of ripple counters is that not all bits update at the same time; all the flip-flops use different clocks. Also, a ripple counter cannot run as fast, because it takes extra time for the carry to propagate down the chain of counters. The synchronous counter solves these problems by using a single clock for all the flip-flops, as shown above. Each flip-flop combines the previous bits together to determine whether to update.
This page is a utility for simulating синхронный счетчик online with specified initial values.










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