Question

• Alqarni ELEG 2134 Digital Logic Design Quiz 3, 10/19/2016 Time: 11:00 AM-11:40 AM Please show all intermediate steps. Question (10 points) Assume the inverters have a delay of 1 ns and the other gates have a delay of 2 n Initially $A = B = C = 0$ and $D = 1$; C changes to 1 at time 2 ns. a) Draw the timing chart and find the possible hazards. (Hint: The 3-steps) b) Use K-map to find the two sum terms needed to eliminate the above hazards c) Modify the circuit so that it is hazard free. A E AS + 92 00 SD ?? ? ?? ?? D F H C B Do G 11 ??

          • Alqarni
ELEG 2134 Digital Logic Design
Quiz 3, 10/19/2016
Time: 11:00 AM-11:40 AM
Please show all intermediate steps.
Question (10 points)
Assume the inverters have a delay of 1 ns and the other gates have a delay of 2 n
Initially $A = B = C = 0$ and $D = 1$; C changes to 1 at time 2 ns.
a) Draw the timing chart and find the possible hazards. (Hint: The 3-steps)
b) Use K-map to find the two sum terms needed to eliminate the above hazards
c) Modify the circuit so that it is hazard free.
A
E
AS +
92
00
SD
??
?
??
??
D
F
H
C
B
Do
G
11
??

• Alqarni
ELEG 2134 Digital Logic Design
Quiz 3, 10/19/2016
Time: 11:00 AM-11:40 AM
Please show all intermediate steps.
Question (10 points)
Assume the inverters have a delay of 1 ns and the other gates have a delay of 2 n
Initially A = B = C = 0 and D = 1; C changes to 1 at time 2 ns.
a) Draw the timing chart and find the possible hazards. (Hint: The 3-steps)
b) Use K-map to find the two sum terms needed to eliminate the above hazards
c) Modify the circuit so that it is hazard free.
A
E
AS +
92
00
SD
??
?
??
??
D
F
H
C
B
Do
G
11
??

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