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EndsemDec 20252019 patternSE IT

Digital Electronics and Logic Design (DELD) SPPU Endsem Question Paper Dec 2025

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated DELD questions
Subject code
210245
Pattern
2019 pattern
Exam
Endsem
Session
Dec 2025
Max. marks
70
Time
2½ Hours
Semester
III
Paper code
[6582]-44

Printed for: S.E. (Computer Engineering)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q6, Q.7 or Q8.
  2. Figures to the right indicates full marks.
  3. Neat diagrams must be drawn wherever necessary.
  4. Assume suitable data, if necessary.

Questions

  1. Q1

    1. a)

      Design and explain 2-bit Synchronous up counter using JK FlipFlop. Also draw necessary timing diagram.

      [6]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]
    3. c)

      Explain types of shift registers & state any two applications.

      Also asked:May 2025

      [6]

  2. Q2

    1. a)

      Draw basic internal structure of decade counter IC 7490. Draw the diagram for MOD-26 counter using IC7490.

      [6]
    2. b)

      Explain working of MS JK-FlipFlop.

      [6]
    3. c)

      Draw & Explain Johnson counters with initial state “1010”, from initial states explain all possible states.

      [6]

  3. Q3

    1. a)

      What is an ASM chart? Name the elements of an ASM chart. What is difference between ASM chart & conventional flow chart?

      [6]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]
    3. c)

      What is difference between ROM, PAL & PLA. 2

      Also asked:May 2025

      [5]

  4. Q4

    1. a)

      Draw the state diagram, state table & ASM chart for 3-bit binary UP counter having one enable E, such that. E = 1, counting enabled E = 0, counting disabled

      [6]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]
    3. c)

      Draw and explain the general structure of DLA.

      [5]

  5. Q5

    1. a)

      State the following characteristics of digital IC logic family TTL and CMOS: i) Noise margin ii) Propagation delay iii) Power dissipation

      [6]
    2. b)

      Draw & explain two input TTL NAND gate with active pull up.

      [6]
    3. c)

      Draw & explain the circuit diagram CMOS-Inverter.

      Also asked:May 2025

      [6]

  6. Q6

    1. a)

      Explain tristate logic with respect to logic families.

      [6]
    2. b)

      Give the classification of logic family also write voltage & current parameters of CMOS-logic family.

      [6]
    3. c)

      Explain TTL open collector with neat diagram.

      Also asked:May 2024

      [6]

  7. Q7

    1. a)

      Explain basic arithmatic operation using ALU IC 74181.

      Also asked:May 2024

      [6]
    2. b)

      What is microprocessor? List different applications of Microprocessor (any 4).

      Also asked:May 2025 ·May 2024

      [6]
    3. c)

      Write a short note on with respect to Microprocessor. i) Address bus ii) Control bus

      [5]

  8. Q8

    1. a)

      With the help of block diagram explain fundamental units of microprocessor.

      [6]
    2. b)

      Explain memory organization of microprocessor in detail.

      Also asked:May 2025 ·May 2024

      [6]
    3. c)

      Draw & explain 4 bit multiplier circuit using ALU & shift registers. eeee

      Also asked:May 2025

      [5]