Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January CSE 3rd Sem 76435 Digital Electronics Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (CSE/IT) (2018 Batch) (Sem.?3)
DIGITAL ELECTRONICS
Subject Code : BTES-301-18
M.Code : 76435
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O 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
Write briefly :
1.
State flip flop and its function.
2.
Draw the full adder circuit using half adder.
3.
Write the function of magnitude comparators.
4.
Draw the NOR gate latch write its truth table.
5.
What are the types of programmable logic devices?
6.
Give the difference between Moore and Melay's model.
7.
State the De Morgan's law and write any one application.
8.
Convert the decimal number 39.75 to hexadecimal.
9.
Differentiate between combinational circuit and sequential circuits.
10. What will be memory capacity of RAM if it has 10 bit address lines?
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SECTION-B
11. Compare various number system in detail.
12. Illustrate the design procedure with algorithmic state machine with neat flow chart.
13. Discuss the features and functional blocks of FPGA.
14. Simplify the Boolean expression using K map :
F (A,B,C,D) = (0,3,6,7,9,13,14,15)
15. How an op-Amp will act as differentiator and integrator? Explain.
SECTION-C
16. Design AND-OR logic for the expression (A + B)(C + D)(E + F). Also convert the same
circuit in NOR logic gate circuit.
17. a) What are the different logic gates? Give their truth tables.
b) Describe the classification of semiconductor memories.
18. What is JK flip flop? Discuss its working. What is race around condition?
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 post was last modified on 26 June 2021