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Step 1 of 4 7.19DP Refer to the Figure X7.19 from the text book. It is clear that Figure X7.19 represents the clocked synchronous state machine. The excitation equation for the state machine shown in Figure X7.19 is as follows: Step 2 of 4 The next state for D flip flop is same as input. Consider that the next state is represented by Q*. Thus the equation for the next state (Q*) is as follows. = = X = = Step 3 of 4 Write the excitation or the transition table as shown in Table 1. Present Next state state XY Q1Q2Q3 00 01 11 10 000 001 011 111 101 001 001 001 101 101 010 001 011 111 101 011 001 001 101 101 100 010 011 111 110 101 000 001 101 100 110 010 010 110 110 111 000 000 100 100 Q1*Q2*Q3* Table 1: Excitation / transitions table for figure 1. Step 4 of 4 Use the state table name is as A-D according to the values of Q1 and Q2 from 00-11. The state table for transition table (Table 1) is as shown in Table 2. Present Next state state XY 00 01 11 10 A B D H F B B B F F C B D H F D B B F F E C D H G F A B F E G C C G G H A A E E Table 2: State table for Figure 1 Thus, the excitations equations, excitation table and the state table are obtained for the Figure X7.19.