4-bit binary Asynchronous Counter v2

• 4-bit Binary Counter = 2^4 = 16 (modulo-16 or MOD-16) The Modulo number can be increased by adding more flip-flops to the counter and cascading is a method of achieving higher modulus counters. Then the modulo or MOD number can simply be written as: MOD number = 2n Some of the advantages of Asynchronous Counters: 1 Asynchronous Counters can easily be made from Toggle or D-type flip-flops. 2 They are called “Asynchronous Counters” because the clock input of the flip-flops are not all driven by the same clock signal. 3 Each output in the chain depends on a change in state from the previous flip-flops $output. 4 Asynchronous counters are sometimes called ripple counters because the data appears to “ripple” from the output of one flip-flop to the input of the next. 5 They can be implemented using “divide-by-n” counter circuits. 6 Truncated counters can produce any modulus number count.

published 8 years ago