Syllabus (Subject: Digital Circuits & Systems)

SUBJECT: DIGITAL CIRCUITS & SYSTEMS 

SEMESTER- 3 rd Subject Code: 3TBEC302  Course: B.E. (E.C.E )

Max. Marks: 50  Min. Marks : 17 

COURSE OBJECTIVE: 

• To introduce number systems and codes
• To introduce basic postulates of Boolean algebra and shows the correlation between Boolean expressions 
• To introduce the methods for simplifying Boolean expressions 
• To outline the formal procedures for the analysis and design of combinational circuits and sequential circuits 
• To introduce the concept of memories, programmable logic devices and digital ICs. 

Syllabus:

Unit – I Number Systems: Decimal, Binary, Octal and Hexadecimal systems, conversion from one base to another, Codes-BCD, Excess- 3, Gray Reflected ASCII, EBCDIC. Logic gates and binary operations- AND, OR, NOT, NAND, NOR, Exclusive–OR and Exclusive– NOR Implementations of Logic Functions using gates, NAND–NOR implementations – Multi level gate implementations- Multi output gate implementations. Boolean postulates and laws – De-Morgan’s Theorem - Principle of Duality, Boolean function, Canonical and standard forms, Minimization of Boolean functions, Minterm, Maxterm, Sum of Products (SOP), Product of Sums (POS),Karnaugh map Minimization, Don’t care conditions, Quine-McCluskey method of minimization.

Unit – II Combinational logic circuits :Half adder – Full Adder – Half subtractor – Full subtractor– Parallel binary adder, parallel binary Subtractor – Fast Adder - Carry Look Ahead adder– Serial. Adder/Subtractor - BCD adder – Binary Multiplier – Binary Divider - Multiplexer/De-multiplexer – decoder - encoder – parity checker – parity generators – code converters - Magnitude Comparator.

Unit – III Sequential Logic Design: Building blocks like S-R, JK and Master-Slave JK FF, Edge triggered FF, Finite state machines, Design of synchronous FSM, Algorithmic State Machines charts. Designing synchronous circuits like Pulse train generator, Pseudo Random Binary Sequence generator, Clock generation

Unit – IV Registers and Counters: Asynchronous Ripple or serial counter. Asynchronous Up/Down counter - Synchronous counters – Synchronous Up/Downcounters – Programmable counters – Design of Synchronous counters: state diagramState table –State minimization –State assignment - Excitation table and mapsCircuit. Implementation - Modulo–n counter, Registers – shift registers - Universal shift registers. Shift register counters – Ring counter – Shift counters - Sequence generators. 

Unit - V Logic Families and Semiconductor Memories: TTL NAND gate, Specifications, Noise margin, Propagation delay, fan-in, fan-out, Tristate TTL, ECL, CMOS families and their interfacing, Memory elements, Conceptof Programmable logic devices like FPGA. Logic implementation using Programmable Devices

List of Experiments: 

• Study of different basic digital logic gates and verification of their Truth Table. 
• Study and verification of the law of Boolean Algebra and De-Morgan’s Theorem. 
• Construction and verification of various combinational circuits such as Half Adder, Full 
• Adder, Half & Full Subtractor. 
• Study of Multiplexer, De-multiplexer. 
• Study of Different Code Converters, Encoder, Decoder. 
• Construction and verification of various types of Flip-Flops using gates and IC’s. 
• Construction and Verification of different Shift Registers. 
• Construction and verification of different types of Counters. 
• Study of important TTL technologies, Verifications of important TTL Circuit Parameters. 

Course outcome: 

On completion of this course, the students can design combinational and sequential digital logic circuits. Also they will have knowledge on Programmable Logic devices and its usage. 

Text Books: 

• Digital Design, 3rd Edition M. Morris Mano Prentice Hall of India Pvt. Ltd., 2003 Pearson Education (Singapore) Pvt. Ltd., New Delhi, 2003 
• Digital Principles and Applications 6th Edition Donald P. Leach and Albert Paul Malvino, TMH, 2003. 

Reference Books: 

• Digital electronics Principles and Integrated circuits Anil K. Maini, Wiley India Pvt. Ltd. 
• Fundamental of digital circuit 3rd edition. Anand kumar PHI 
• Digital Design, Principles and Practices John. F. Wakerly, Pearson Prentice Hall