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Digital Electronics Question Paper - Dec 17 - Electronics And Telecomm (Semester 3) - Pune University (PU)
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Digital Electronics - Dec 17
Electronics And Telecomm (Semester 3)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1.a.
Design full adder using logic gates.
(4 marks)
00
1.b.
Minimize the following expression using K-map and implement using logic gates:
(4 marks)
00
$Y = \Sigma m(1,3,5,9,11,13)$
1.c.
Write a short note on one-bit memory cell.
(4 marks)
00
OR
2.b.
Design a 3-bit binary to gray code converter
(6 marks)
00
2.b.
Draw and explain 4-bit Ring counter.
(6 marks)
00
3.a.
Draw and explain the working of 2-input CMOS NAND gate.
(6 marks)
00
3.b.
Explain state diagram and state table with suitable example.
(6 marks)
00
OR
4.a.
Explain the following characteristics of digital IC's:
(6 marks)
00
i. Fan in
ii. Fan out
iii. Propagation delay
4.b.
Write short note on state reduction with suitable example.
(6 marks)
00
5.a.
Explain in detail the architecture of PLA.
(6 marks)
00
5.b.
Implement the following functions using PLA:
(4 marks)
00
$F1 = \Sigma m(1,3,5,7)$
$F2 = \Sigma m(0,2,4,6)$
5.c.
List out advantages of semiconductor memories.
(3 marks)
00
OR
6.a.
Draw circuit of one-cell of static and explain its working.
(6 marks)
00
6.b.
Differentiate between ROM and RAM.
(4 marks)
00
6.c.
State advantages of PLD over fixed function IC.
(3 marks)
00
7.a.
Draw and explain interrupt register in detail of 8051.
(6 marks)
00
7.b.
Differentiate microprocessor and microcontroller.
(4 marks)
00
7.c.
List advantages of microcontroller.
(3 marks)
00
OR
8.a.
Draw and explain block diagram of microcontroller.
(6 marks)
00
8.b.
Explain the use of program counter.
(4 marks)
00
8.c.
Explain ACALL instruction.
(3 marks)
00
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