Digital Design Session 28

Digital Design – © 2020 Mouli Sankaran Email: mouli.sankaran@yahoo.com 2
Session 28: Focus
 Quiz and Lab Mid-Sem Solutions:
◦ DD Quiz 3 – Set-1 (and answers to Set-2)
◦ DD Lab Mid-Sem solutions (set-1)

DD: Q1
Correct Option: C Set-2 Answer key: B

DD : Q2
Correct Option: D Set-2 Answer key: A

IES : Q3
Correct Option: B Set-2 Answer key: C

DD : Q4
Correct Option: D Set-2 Answer key: C

IES : Q5
Correct Option: B Set-2 Answer key: A

DD : Q6
Correct Option: A Set-2 Answer key: B

DD : Q7
Correct Option: A Set-2 Answer key: B

DD : Q8
Answer: ANS: Q alternates between zero and one
on every positive clock edge. It remains zero
after the 3rd positive clock edge.
Set-2 The Same Answer

DD : Q9
Answer: Q(t) or no change, 0, 1, Q’(t) Set-2 The Same Answer

DD : Q10
Answers:
> CLK
Q’ Q’
CLK

DD : Q11

DD : Q12
Answer:

DD : Q13

DD : Q14
Set-2 Answer:

DD : Q15

Digital Design – © 2020 Mouli Sankaran Email: mouli.sankaran@yahoo.com
DD Lab Mid-Sem Solutions

DD Lab: Q1
This construction (odd number of not gates) is called Ring Oscillator
The output oscillates between zero and one. The pulse width will be equal to the
Propagation delay of signal going through the logic gates from one end to the other
end of the loop.
We cannot see the flickering of LEDs with naked eyes, since the pulse width
is in the range of a few nano seconds.

DD Lab: Q2
Answer: Output D is closer
Truth table for an XNOR gate
Input A Input B Output
false false true
false true false
true false false
true true true
XNOR Output:
Perfect output
Both will be given
marks

DD Lab: Q3
ANS: 1 (for all the even number of XOR gates)

DD Lab: Q4

DD Lab: Q4 - Answer

DD Lab: Q5
For Sa

DD Lab: Q5 … contd.
For Sb

Session 28: Summary
 Solutions:
◦ DD Quiz 3 – Set-1 (and answers to Set-2)
◦ DD Lab mid-sem solutions (set-1)

Digital Design Session 28

More Related Content

What's hot

Similar to Digital Design Session 28

More from International Institute of Information Technology - Bangalore

Recently uploaded

Digital Design Session 28