Digital Electronics PYQ 2024-25 AKTU Question Paper

AKTU · BTECH · Semester 3, 4 · Digital Electronics · Session 2024-25 · PYQ

AKTU Digital Electronics previous year question paper 2024-25 for B.Tech Semester 3/4. Covers Digital System, Binary Numbers and Logic Simplification…

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Digital Electronics AKTU syllabus

  1. Unit 1: Digital System, Binary Numbers and Logic Simplification
  2. Unit 2: Combinational Logic
  3. Unit 3: Sequential Logic and Its Applications
  4. Unit 4: Synchronous and Asynchronous Sequential Circuits
  5. Unit 5: Memory, Programmable Logic and Digital Logic Families

Questions in Digital Electronics AKTU PYQ 2024-25

  1. Q1a. Convert the following binary number into grey code. 1. (110111)₂ 2. (100110)₂ (2 marks, 2024-25)
  2. Q1a. What are SOP and POS forms? (2 marks, 2024-25)
  3. Q1b. Perform the subtraction using 2's complement method of the following (1100)₂-(11101)₂ (2 marks, 2024-25)
  4. Q1b. Which logic gates are called universal gates? (2 marks, 2024-25)
  5. Q1c. Implement a 4:1 multiplexer using 2:1 multiplexer. (2 marks, 2024-25)
  6. Q1c. What is a magnitude comparator used for? (2 marks, 2024-25)
  7. Q1d. Elucidate the race around condition in sequential circuit. (2 marks, 2024-25)
  8. Q1d. What is the advantage of a synchronous counter over an asynchronous counter? (2 marks, 2024-25)
  9. Q1e. Discuss the R-S flip flop in detail. (2 marks, 2024-25)
  10. Q1e. What are essential hazards? (2 marks, 2024-25)
  11. Q1f. Enlist the advantages of EEPROM. (2 marks, 2024-25)
  12. Q1f. What is fan-out? (2 marks, 2024-25)
  13. Q1g. Explain the flash type ADC. (2 marks, 2024-25)
  14. Q1g. Which logic family consumes the least power? (2 marks, 2024-25)
  15. Q2a. Simplify the Boolean expression using K-map F (A, B, C, D) = ∏ M (4,5,6,7,8,12). d (0, 1, 2, 3, 9, 11, 14) (7 marks, 2024-25)
  16. Q2a. Convert the following numbers to their respective bases: i) (47.625)₁₀ to binary ii) (101101.101)₂ to decimal iii) (3F9)₁₆ to decimal iv) (543)₈ to binary (7 marks, 2024-25)
  17. Q2b. Design a full adder using a ROM. (7 marks, 2024-25)
  18. Q2b. Discuss multiplexed display systems. How are they used in practical applications? (7 marks, 2024-25)
  19. Q2c. Define bi-directional shift register. Draw and explain 3-bit bi-directional shift register using D flip-flop. (7 marks, 2024-25)
  20. Q2c. Explain flip-flop conversion. How can a JK flip-flop be converted into a D flip-flop? (7 marks, 2024-25)
  21. Q2d. Elaborate a comparison of CMOS, TTL and RTL logic families. (7 marks, 2024-25)
  22. Q2d. What is race-free state assignment? Why is it necessary in asynchronous sequential circuits? (7 marks, 2024-25)
  23. Q2e. Explain the working of dual slope ADC with neat diagram. (7 marks, 2024-25)
  24. Q2e. What is Programmable Logic Arrays (PLA)? Explain their structure and working. (7 marks, 2024-25)
  25. Q3a. Simplify and minimize the following four variable switching function using Quine-McCluskey tabulation method. f(A,B, C, D)=∑m(0,1,2,3, 4, 6,8, 9, 10, 11) (7 marks, 2024-25)
  26. Q3a. Design an excess 3 to BCD code converter. (7 marks, 2024-25)
  27. Q3b. Implement the Boolean expression using only NAND gate. Y=((A+B)C)D (7 marks, 2024-25)
  28. Q3b. Discuss the Karnaugh map (K-map) method for Boolean function simplification. Simplify the following Boolean function using K-map and also draw the simplified logic circuit using basic gates. f(A, B, C, D) = Σm (0, 1, 5, 6, 12, 13, 14) + d(2, 4) (7 marks, 2024-25)
  29. Q4a. Explain the look ahead carry generator with neat diagram. (7 marks, 2024-25)
  30. Q4a. Explain the working of a BCD adder. How does it differ from a binary adder? (7 marks, 2024-25)
  31. Q4b. Implement the following function. F (A, B, C, D) = ∑m (0, 1, 3, 4, 7, 8, 9, 11, 14, 15) using 1. 8:1 MUX 2. 4:1 MUX (7 marks, 2024-25)
  32. Q4b. Describe half subtractor circuits with truth tables and circuit diagrams. (7 marks, 2024-25)
  33. Q5a. Design a synchronous binary MOD-6 counter. (7 marks, 2024-25)
  34. Q5a. What are synchronous counters? Explain the design and working of a 4-bit synchronous counter. (7 marks, 2024-25)
  35. Q5b. Explain Mealy machine and Moore machine. Also state the differences between Mealy and Moore machine. (7 marks, 2024-25)
  36. Q5b. Explain Johnson counters with timing diagrams and applications. (7 marks, 2024-25)
  37. Q6a. Draw the circuit of an ECL gate and explain its operation. (7 marks, 2024-25)
  38. Q6a. What is the significance of state assignment? List the different techniques for state assignment. (7 marks, 2024-25)
  39. Q6b. Elaborate the term PAL, PLA and FPGA with neat diagram. (7 marks, 2024-25)
  40. Q6b. Explain the differences between synchronous and asynchronous sequential circuits with examples. (7 marks, 2024-25)

AKTU paper codes: BOE310, BOE410, BOE310H, BOE410H, KOE039, BEE401, KEE401, KOE049

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