1. ECE Homework #6
Derive the state table and state diagram of the sequential circuit of the Figure below.
What is the function of the circuit? A’ A B’ B Q’ Q Q’ Q T T

2. ECE Homework #6
A sequential circuit has four flip-flops A,B,C,D an input x and output z. It is described by the following state equations:
A(t*)=(CD’+C’D)+(CD+C’D’)x
B(t*)=A
C(t*)=B
D(t*)=C
z=AB’+CD’
Construct the state table and state diagram.
A sequential circuit has two flip-flops (A and B), two inputs (x and y) and an output (z). The flip-flop input functions and the circuit output function are as follow:
JA=xB+y’B’ KA=xy’B’
JB=xA’ KB=xy’+A
z=xyA+x’y’B
Obtain the logic diagram, state table and state diagram

3. ECE 320 Homework #6 T flip-flop JK flip-flop D flip-flop
A sequential circuit has one input and one output. The state diagram is shown in Figure below. Design the sequential circuit with:
T flip-flop
JK flip-flop
D flip-flop
0/0
1/1
001
0/0
0/0
1/0
100
011
0/0
010
1/1
1/1
1/1
0/0
000

4. ECE Homework #6
Design a counter with the following sequence: 0,1,3,2,6,4,7 and repeat. (Use JK flip-flop)
Design a counter that counts the decimal digits according to the code. (Use T flip-flop)