Sorry, you need a Java-enabled browser to see the simulation.  

This circuit is a 4-bit synchronous 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.

Next: Decimal Counter
Previous: 8-Bit Ripple Counter
Index







java@falstad.com
Generated Sat Nov 15 2014