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Design lockout free Mod 12 up synchronous counter using JKMS flip flops.
written 2.9 years ago by gravatar for teamques10 teamques10 ★ 64k •   modified 2.9 years ago
digital electronics
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written 2.9 years ago by gravatar for teamques10 teamques10 ★ 64k

Answer:

Excitation Table for MOD-12:-

Present state Next state Flip Flop Inputs
QA QB QC QD QA(N+1) QB(N+1) QC(N+1) QD(N+1) JA KA JB KB JC KC JD KD
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
0 0 0 0 0 0 0 1 0 X 0 X 0 X 1 X
0 0 0 1 0 0 1 0 0 X 0 X 1 X X 1
0 0 1 0 0 0 1 1 0 X 0 X X 0 1 X
0 0 1 1 0 1 0 0 0 X 1 X X 1 X 1
0 1 0 0 0 1 0 1 0 X X 0 0 X 1 X
0 1 0 1 0 1 1 0 0 X X 0 1 X X 1
0 1 1 0 0 1 1 1 0 X X 0 X 0 1 X
0 1 1 1 1 0 0 0 1 X X 1 X 1 X 1
1 0 0 0 1 0 0 1 X 0 0 X 0 X 1 X
1 0 0 1 1 0 1 0 X 0 0 X 1 X X 1
1 0 1 0 1 0 1 1 X 0 0 X X 0 1 X
1 0 1 1 0 0 0 0 X 1 X 1 0 X 0 X
1 1 0 1 0 0 0 0 X 1 X 1 0 X X 1
1 1 1 0 0 0 0 0 X 1 X 1 X 1 0 X
1 1 1 1 0 0 0 0 X 1 X 1 X 1 X 1

 

K-MAPS:-
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