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Excitation Tables for Flip-Flops :

Excitation table for the flip-flop plays an important role in state machine design. With this table, the signals necessary to produce desired flip-flop outputs can be found. The next state table is considered as an aid in analyzing a state machine.The Exciitation table & timing diagram for the DFF & JKFF are as shown in Figure below,

Exciitation Table & Timing diagram By using the exciatation table the Flipflop inputs are derived and then buy use of K-Map the Boolean expressions for the input signals are developed. (refer Fig. 4.3.2). The Boolean expressions are then implemented using combinational circuits as shown in Figure below.

Exciitation Table & Timing diagram