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 • 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 • Examples of IC gates • 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, De-Multiplexer/Decoders • Adders, Sub tractors • 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 • Quine-Mc cluskey 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 ICs • 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 and Programmable Logic Devices
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