Download PTU B.Tech 2021 Jan Automation-And-Robotics 5th Sem 78218 Digital Electronics Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January Automation-And-Robotics 5th Sem 78218 Digital Electronics Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.T ech. (Automation & Robotics) (Sem.?5)
DIGITAL ELECTRONICS
Subject Code : BTAR-504-18
M.Code : 78218
Time : 3 Hrs. Max. Marks : 60
INST RUCT ION TO CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1)
What do you mean by signed and unsigned numbers? Explain.
2)
Convert 1101010 Gray number to binary number.
3)
Differentiate between combinational and sequential circuits.
4)
Discuss the advantages and disadvantages of QM method and K-Map method.
5)
What is race around condition? Discuss.
6)
Discuss accuracy and resolution w.r.t. A/D converters.
7)
What is the significance of excitation table? Discuss.
8)
What is PAL? List its advantages.
9)
List the advantages of successive approximation A/D converter.
10) List the limitations of weighted resistor type digital to analog converter.
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SECTION-B
11) Convert 11001.1001 binary number to decimal number, hexadecimal and octal.
12) Explain the logic diagram and working of SR flip flop in detail. Also discuss its
limitations.
13) Draw the logical diagrams and explain the working of encoder and multiplexer.
14) Discuss the classification and characteristics of memories in detail.
15) State and prove DeMorgan's theorems. Also using the law/theorems of Boolean algebra
prove that AB AC BC AB AC .
SECTION-C
16) Reduce F(A , B, C, D) =m(0,1,2,5,6,7,8,9,10,14) to the simplest possible form using
Quine-McClusky method. Also prove the same with K-Map method.
17) Explain the working of parallel and counter type A/D converters. Support your answer
with suitable diagrams, if required.
18) Explain :
a) PLA
b) MOD-10 counter
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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