B.TechSemester 32021-22Digital System DesignKEC-302
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Digital System Design (KEC-302) - AKTU Question Paper 2021-22

B.Tech · Semester 3 · Free PDF Download

This is the official AKTU Digital System Design Previous Year Question Paper for B.Tech Semester 3, academic session 2021-22. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 3
Session:2021-22
University:AKTU / UPTU

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Questions Asked in 2021-22

Digital System Design (KEC-302) — extracted question text

Section AAttempt all questions in brief: 2 x 10 = 20
  • a
    Simplify the expression F (A, B, C) = AB+BC+A’ by K- Map. 2 1
  • b
    Discuss the concept of fan-in and fan-out? 2 3
  • c
    What is the role of subtractor in digital electronics? 2 3
  • d
    Construct half subtractor using NAND gates. 2 4
  • e
    Distinguish between shifter and barrel shifter? 2 3
  • f
    Define ASM and FSM? 2 4
  • g
    Why ECL is fastest logic family? 2 3
  • h
    What do you understand by digital TTL? 2 4 i. List some advantages of successive approximation? 2 2 j. Where is SAR ADC used? 2 5
Section BAttempt any three of the following: 3 x 10 = 20
  • a
    Write the differences between combinational and sequential circuits. 10 1
  • b
    Design 2-bit magnitude comparator. 10 2
  • c
    Explain the working of Master-Slave JK flip-flop with the help of logic diagram, functional table, logic symbol
  • d
    i) Draw and explain block diagram of Moore model and Mealy model. ii) Write the difference between ripple counter and synchronous counter
  • e
    List the guidelines for construction of state graphs. 10 4
Section CAttempt any one part of the following: 1 x 10 = 10
  • a
    Minimize the following Boolean function
  • b
    Expand the following into canonical form and represent in decimal form: i) f1 = a+bc+ac’d into min terms. ii) f2 = a(b+c) (a+c+d) into max terms
  • a
    Explain the concept of serial adder with accumulators. 10 2
  • b
    Design a full adder by constructing the truth table and simplify the output equations
  • a
    Design a mod 11 up ripple counter using T-FF. 10 3
  • b
    Explain positive edge triggered D-flip-flop with the help of circuit diagram and waveforms
  • a
    Draw a circuit diagram of a CMOS inverter. Draw its transfer characteristics and explain its operation
  • b
    With the help of a neat diagram, explain the working of a two-input TTL NAND gate
  • a
    Explain single slope and dual slope ADC with a neat sketch. 10 5
  • b
    Describe switched capacitor and write its applications. 10 5

Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

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