This download link is referred from the post: PTU B.Tech 5th Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University
Roll No. : Total No. of Pages : 02
Total No. of Questions : 18
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B.Tech. (Automation & Robotics) (Sem.-5)
DIGITAL ELECTRONICS
Subject Code : BTAR-504-18
M.Code : 78218
Time : 3 Hrs. Max. Marks : 60
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INSTRUCTION TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
SECTION-A
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Answer briefly :
- What do you mean by signed and unsigned numbers?-Explain.
- Convert 1101010 Gray number to binary number.
- Differentiate between combinational and sequential circuits.
- Discuss the advantages and disadvantages of QM method and K-Map method.
- What is race around condition? Discuss.
- Discuss accuracy and resolution w.r.t. A/D converters.
- What is the significance of excitation table? Discuss.
- What is PAL? List its advantages.
- List the advantages of successive approximation A/D converter.
- List the limitations of weighted resistor type digital to analog converter.
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SECTION-B
- Convert 11001.1001 binary number to decimal number, hexadecimal and octal.
- Explain the logic diagram and working of SR flip flop in detail. Also discuss its limitations.
- Draw the logical diagrams and explain the working of encoder and multiplexer.
- Discuss the classification and characteristics of memories in detail.
- State and prove DeMorgan’s theorems. Also using the law/theorems of Boolean algebra prove that AB+ AC + BC = AB+ AC.
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SECTION-C
- Reduce F(A , B, C, D) = Σm(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.
- Explain the working of parallel and counter type A/D converters. Support your answer with suitable diagrams, if required.
- Explain :
a) PLA
b) MOD-10 counter
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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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This download link is referred from the post: PTU B.Tech 5th Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University