Sequential Circuits

Q8: MOD 8 Counter

Q-Implement a MOD-8 counter using Parallel-in Parallel-out register and Adder.

Ans: We have a 3-bit register with two common inputs CLK & CLEAR for all 3 FFs. So we initiate the counter we clear all the FFs and then give clock.  Whenever count reaches 7 output of adder becomes 000 with carry 1 and carry is ignored and 000 is fed into register. We have the circuit as:

In the circuit block of 3 FFs is a register with 2 common inputs.

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