engineering recuitment GATE ECE 2023-24 Test Series Digital Electronics Sequential Circuits

Two D flip-flops are connected as a synchronous counter that goes through the following Q_BQ_A sequence 00 “ 11 “ 01 ” 10 “ 00 “ … The combination to the inputs D_A and D_B are

1

D_A = Q_B; D_B = Q_A

2

D_A = Q_A; D_B = Q_B

3

D_A = (Q_AQ_B + Q_AQ_B); D_B = Q_A

4

D_A = Q̅_AQ̅_B + Q_AQ_B, D_B = Q̅_B

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