Question

Complete the following state table. Note that the flip-flops are not all of the same type. Present FFin Next QA QB Qc JAKA TB

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Answer #1
Truth Table for D-FF
Q(present state) D(input) Q+(next state)
0 0 0
0 1 1
1 0 0
1 1 1
Truth Table for T-FF
Q(present state) T(input) Q+(next state)
0 0 0
0 1 1
1 0 1
1 1 0


Truth Table for JK-FF
Q(present state) J K Q(next state)
0 0 0 0
0 0 1 0
0 1 0 1
0 1 1 1
1 0 0 1
1 0 1 0
1 1 0 1
1 1 1 0
From above jk_truth table
Q(present state) jk Q(next state)
0 0X 0
0 1X 1
1 X0 1
1 X1 0

BASED ON ABOVE TRUTH TABLES

TABLE
QA QB QC JAKA TB DC QA+ QB+ QC+
0 0 0 0X 1 0 0 1 0
0 0 1 1X 0 1 1 0 1
0 1 0 1X 1 0 1 0 0
0 1 1 0X 0 1 0 1 1
1 0 0 X1 0 1 0 0 1
1 0 1 X0 1 0 1 1 0
1 1 0 X0 0 1 1 1 1
1 1 1 X1 1 1 0 0 1

In the above table Q+ respresnt next state

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