The state table for a sequential circuit is given in Table 4-16.

(a) Draw the state diagram for the circuit.

(b) Implement the circuit using D lip- lops and minimal input functions for each lip- lop. Reset is asynchronous and active low (RESET = 0), and initializes the state to A = 0, B = 0.

Table 4-16:

State Table for Problem 4-33 Present State A B 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 Input Y 0 1 0 1 0 1 0 1 Next State A B T100TOOL 0 1 0 1 0 0 0 0 Output N 1 1 0 0 0 0 1 1