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JK Flip-flop State Transition Diagram

State diagram explains to us about state transition of all condition of system outputs when the system receive the inputs. This principle can be used to design a discrete state machine such as vending machine. For a simple example of this system can be explained with a simple circuit that employ a flip-flop (as sequential circuit). To know about the state transition diagram of the JK flip-flop circuit, we can consider an example below.

J_A=B ;        K_A=Bin'

J_B=in' ; K_B=A'in+Ain'

Then we can draw this circuit as in figure 1, the next step is determining the truth table from the combination of all inputs (in, and the current condition of X and Y), as shown in table. The last step is construct the state diagram as shown in figure 2.

 Figure 1. JK flip-flop circuit and the truth table of state transition.

Figure 2. JK flip-flop circuit state diagram.

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