Refer to the example of the up/down counter we went over in class, show your work of EVERY STEP
in the sequential circuit design procedure. That means,
a. From Problem Description (given by this homework problem description) to Circuit State
Transition Diagram;
b. From Circuit State Transition Diagram to Circuit Excitation Table;
c. Based on the Circuit Excitation Table derive Flip-Flop's input equations and the circuit output
equation;
d. Draw Circuit Schematic Diagram.
Note: You can use one table to show both JK Flip-Flops' inputs and T Flip-Flops' inputs. But, you
should draw separate circuits for (b) and (c).
4.11 Design a 3-bit bidirectional Gray code counter, which counts by the following
Gray code sequences:
If x = 0,
ABC = 000 \rightarrow 001 \rightarrow 011 \rightarrow 010 \rightarrow 110 \rightarrow 111 \rightarrow 101 \rightarrow 100 \rightarrow 000
If x = 1,
ABC = 000 \rightarrow 100 \rightarrow 101 \rightarrow 111 \rightarrow 110 \rightarrow 111 \rightarrow 010 \rightarrow 011 \rightarrow 000
using (a) SR flip-flops;
(b) JK flip-flops;
(c) T flip-flops;
