- A four-bit counter is designed using 4 flip-flops and a corresponding combinational circuit.
- It can count from 0 to 2n- 1 i.e. 2nnumbers.
- Here given n = 4 therefore maximum number that can be counted is 24- 1 = 15.
Important Points
For an ‘n’ flip flop counter,
The total number of states = 2n(0 to 2n– 1)
- The largest number that can be stored in the counter = 2n– 1
To construct any mod counter, the minimum number flip flops required such that: Modulus ≤ 2n
Where n is the number of counters.
For example,
A MOD-5 counter requires:
2n≥ 5
∴ 3 Flip Flops