CS-304 RGPV B.Tech
Digital Systems (DS)
Previous year papers and the official syllabus are free to read, no account needed.
Previous Year Papers
7 papers, latest Dec 2025
- CS-304 paper, Dec 2025
- CS-304 paper, Dec 2024
- CS-304 paper, Dec 2024
- CS-304 paper, Dec 2023
- CS-304 paper, Jun 2023
- CS-304 paper, Nov 2022
Syllabus, notes and important questions for CS-304
Syllabus units
Topics as the official RGPV syllabus lists them.
Unit 1 Number systems and Boolean algebra 9 topics
- Review of 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 2 Combinational Logic 13 topics
- Half adder
- Half subtractor
- Full adder
- Full subtractor
- Look‑ahead carry generator
- BCD adder
- Series and parallel addition
- Multiplexer
- Demultiplexer
- Encoder
- Decoder
- Arithmetic circuits
- Arithmetic Logic Unit (ALU)
Unit 3 Sequential Logic and Memories 10 topics
- Flip‑flops (D, T, S‑R, J‑K Master‑Slave)
- Racing condition
- Edge‑triggered and level‑triggered circuits
- Shift registers
- Asynchronous counters
- Synchronous counters and state diagrams
- Semiconductor memories
- Digital ICs 2716, 2732 and address decoding
- Modern semiconductor memories (DRAM, FLASH RAM)
- Designing with ROM and PLA
Unit 4 Analog‑Digital Conversion and Logic Families 6 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 and applications
- TTL, PMOS, CMOS, NMOS logic
- Interfacing between TTL and MOS
Unit 5 Digital Communication 6 topics
- Nyquist sampling theorem
- Time division multiplexing
- Pulse‑Code Modulation (PCM)
- Quantization error
- BPSK and BFSK modulation schemes
- Shannon’s theorem for channel capacity
Unit 6 == END OF UNITS==
The syllabus lists no separate topics for this unit.
Exam insights
Counted from 7 past CS-304 papers.
Marks asked per paper, by unit
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Unit 1 Review of number systems and number base conversions 31 marks
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Unit 2 Combinational Logic 21 marks
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Unit 3 Sequential logic 25 marks
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Unit 4 Introduction to A/D & D/A convertors 23 marks
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Unit 5 Introduction to Digital Communication 8 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
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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
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Describe the 4-bit universal shift register with a neat diagram.
Asked 3 times: 2024, 2023
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Explain the working of the master-slave J-K flip-flop.
Asked 3 times: 2025, 2023, 2020