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CY-304 RGPV B.Tech

Digital Systems (DS)

Previous year papers and the official syllabus are free to read, no account needed.

Previous Year Papers

6 papers, latest Dec 2025

Free
See all 6 papers

Syllabus, notes and important questions for CY-304

Syllabus units

Topics as the official RGPV syllabus lists them.

Unit 1 Review of number systems and number base conversions 9 topics
  • Number systems and number base conversions
  • Binary codes
  • Boolean algebra
  • Boolean functions
  • Logic gates
  • Simplification of Boolean functions
  • Karnaugh map methods
  • SOP‑POS simplification
  • NAND‑NOR implementation
Unit 1 notes
Unit 2 Combinational Logic 11 topics
  • Half adder
  • Half subtractor
  • Full adder
  • Full subtractor
  • Look‑ahead carry generator
  • BCD adder
  • Series and parallel addition
  • Multiplexer and demultiplexer
  • Encoder and decoder
  • Arithmetic circuits
  • Arithmetic Logic Unit (ALU)
Unit 2 notes
Unit 3 Sequential Logic 9 topics
  • Flip‑flops (D, T, S‑R, J‑K Master‑Slave)
  • Racing condition issues
  • Edge‑triggered and level‑triggered circuits
  • Shift registers
  • Asynchronous and synchronous counters (types and state diagrams)
  • Semiconductor memories
  • Introduction to digital ICs (2716, 2732, etc.) and address decoding
  • Modern semiconductor memories (DRAM, FLASH RAM, etc.)
  • Designing with ROM and PLA
Unit 3 notes
Unit 4 Analog and Digital Interfacing 7 topics
  • A/D and D/A converters and their types
  • Sample‑and‑hold circuits
  • Voltage‑to‑frequency and frequency‑to‑voltage conversion
  • Multivibrators (bistable, monostable, astable, Schmitt trigger)
  • IC 555 applications
  • TTL, PMOS, CMOS, and NMOS logic families
  • Interfacing between TTL and MOS
Unit 4 notes
Unit 5 Introduction to Digital Communication 5 topics
  • Nyquist sampling theorem
  • Time‑division multiplexing (TDM)
  • Pulse‑Code Modulation (PCM) and quantization error
  • BPSK and BFSK modulation schemes
  • Shannon’s theorem for channel capacity
Unit 5 notes
Read the full syllabus

Exam insights

Counted from 5 past CY-304 papers.

Marks asked per paper, by unit

  • Unit 1 Review of number systems and Boolean algebra 24 marks
  • Unit 2 Combinational Logic 21 marks
  • Unit 3 Sequential logic 24 marks
  • Unit 4 A/D & D/A convertors and Multivibrators 24 marks
  • Unit 5 Introduction to Digital Communication 11 marks

Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.

Asked again and again

  1. Explain the need for interfacing between TTL and MOS logic and how TTL-to-MOS/CMOS interfacing is achieved.

    Asked 4 times: 2025, 2022, 2020

  2. Explain the working of the master-slave J-K flip-flop.

    Asked 3 times: 2025, 2023, 2020

  3. What is a multiplexer, its role, and how it selects one input among several inputs, including $8{:}1$ multiplexer with truth table and expression.

    Asked 3 times: 2024, 2019

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