Digital Systems: Principles and Design

485Hazards and Pulse Mode Sequential Circuits

EXERCISES

1. Detect the static 1 and static 0 hazards for X

1

output in the circuit of Figure 19.9.

FIGURE 19.9 Circuit for Exercise 1.

2. From the given Karnaugh three variable map, (Table 19.15) write the Boolean ex-

pression, draw the circuit and find the static 1 and static 0 hazards

TABLE 19.15 Three variable Karnaugh map

X

3

X

1

X

2

10

11 0 0

01 0 0

00

10

3. From the given Karnaugh three variable map (Table 19.16) find the Boolean expres-

sion, logic circuit, and static-1 and hazards.

TABLE 19.16 Three variable SOP form Karnaugh map for circuit

X

3

X

1

X

2

01

00 1 1

10 1 1

11 1

01 1

X

3

X

2

X

1

486

Digital Systems

TABLE 19.17