Official Bihar Engineering University examination question papers, marks distribution, and questions transcript. Available exam sessions: 2025, 2024, 2023, 2020.
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Official BEU curriculum units & topics for this examination subject.
Unit 1.0: Fundamentals of Digital Systems and logic families
Digital signals, digital circuits • AND, OR, NOT, NAND, NOR and Exclusive-OR operations • Boolean algebra, examples of IC gates • Number systems: binary, signed binary, octal hexadecimal number • Binary arithmetic, one's and two's complements arithmetic • Codes, error detecting and correcting codes • Characteristics of digital ICs • Digital logic families: TTL, Schottky TTL and CMOS logic • Interfacing CMOS and TTL, Tri-state logic
Unit 2.0: Combinational Digital Circuits
Standard representation for logic functions K-map representation • Simplification of logic functions using K-map • Minimization of logical functions • Don't care conditions • Multiplexer, DeMultiplexer/Decoders • Adders, Subtractors, BCD arithmetic • Carry look ahead adder, serial adder, ALU • Elementary ALU design, popular MSI chips • Digital comparator, parity checker/generator • Code converters, priority encoders • Decoders/drivers for display devices • Q-M method of function realization
Unit 3.0: Sequential circuits and systems
A 1-bit memory, the circuit properties of Bistable latch • The clocked SR flip flop • J-K-T and D types flip flops • Applications of flip flops • Shift registers, applications of shift registers • Serial to parallel converter, parallel to serial converter • Ring counter, sequence generator • Ripple (Asynchronous) counters, synchronous counters • Counters design using flip flops • Special counter IC's, asynchronous sequential counters • Applications of counters
Unit 4.0: A/D and D/A Converters
Digital to analog converters: weighted resistor/converter • R-2R Ladder D/A converter • Specifications for D/A converters • Examples of D/A converter ICs • Sample and hold circuit • Analog to digital converters: quantization and encoding • Parallel comparator A/D converter • Successive approximation A/D converter • Counting A/D converter, dual slope A/D converter • A/D converter using Voltage to frequency and voltage to time conversion • Specifications of A/D converters • Example of A/D converter ICs
Unit 5.0: Semiconductor memories
Memory organization and operation • Expanding memory size • Classification and characteristics of memories • Sequential memory • Read only memory (ROM) • Read and write memory (RAM) • Content addressable memory (CAM) • Charge de coupled device memory (CCD) • Commonly used memory chips • ROM as a PLD