A sequential circuit has three D flip-flops A, B and C, one input X, and one output Y. The state diagram is shown in Figure below 1. Derive the next-state table. 2. Using K-map to find the minimum SOP expression for the functions DA, Da, De and Y. Draw the logic diagram of the circuit 3. 1/0 011 010 1/1 00

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Latches and Flip Flop

Just like logic gates, the latches and flip-flops are the important elements of an electronic circuit. The logic gates form the important part of combinatorial circuits, while the latches and flip-flops form the essential part of a sequential circuit. Sequential circuits form the important concept of automata theory in electronics and electrical engineering, these circuits are a kind of logic circuit whose output depends on both present input and past inputs, that is, the input history.