2 A sequential circuit has two JK flip-flops A and B and one input x. The circuit is described by the following flip-flop input equations: JA = X JB = x KA =B KB = A' (a) Derive the state equations A (t+1) and B (t+1) by substituting the input equations for the J and K variables. (b) Draw the state diagram of the circuit. 3 A sequential circuit has three flip-flops A, B, C; one input Xin; and one output Yout. The state diagram is shown in Next Figure. The circuit is to be designed by treating the unused states as don't-care conditions. Analyze the circuit obtained from the design to determine the effect of the unused states. a) Use D FF's b) Use T FF's 00 1,0 (100) 011 1 0,0 00 м 0,0 (010) /L (000)