EC 2203DIGITAL ELECTRONICSANNA UNIVERSITY SYLLABUS ECE
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EC 2203 DIGITAL ELECTRONICS L T P C
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AIM
To learn the basic methods for the design of digital circuits and provide the fundamental concepts used in the design of digital
systems.
OBJECTIVES
·
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 and programmable logic devices.
· To illustrate the concept of synchronous and asynchronous sequential
circuits
UNIT I
MINIMIZATION TECHNIQUES AND LOGIC GATES 12
Minimization Techniques: Boolean postulates and laws – DeMorgan’s Theorem  Principle of Duality  Boolean expression  Minimization of Boolean expressions ––
Minterm
– Maxterm
 Sum of Products (SOP) – Product of Sums (POS) – Karnaugh map
Minimization – Don’t care conditions 
QuineMcCluskey method of minimization.
Logic Gates: 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. TTL and CMOS Logic
and their
characteristics – Tristate gates
UNIT II COMBINATIONAL CIRCUITS
12
Design procedure – 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/
Demultiplexer – decoder

encoder
–
parity checker – parity
generators

code converters  Magnitude Comparator.
UNIT III
SEQUENTIAL CIRCUITS
12
Latches, Flipflops  SR, JK, D, T, and MasterSlave
– Characteristic table and equation
–Application table – Edge triggering – Level Triggering – Realization of one flip flop
using other flip
flops – serial adder/subtractor Asynchronous Ripple or serial counter – Asynchronous Up/Down counter  Synchronous counters
– Synchronous Up/Down counters – Programmable counters – Design of Synchronous counters: state diagram State 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 IV MEMORY DEVICES
12
Classification of memories – ROM  ROM
organization 
PROM – EPROM
– EEPROM
– EAPROM, RAM – RAM organization – Write operation – Read operation – Memory
cycle  Timing wave forms – Memory decoding – memory expansion – Static RAM Cell
Bipolar RAM
cell – MOSFET RAM cell – Dynamic RAM cell –Programmable Logic
Devices – Programmable Logic Array (PLA)  Programmable Array Logic (PAL)  Field Programmable Gate Arrays (FPGA)  Implementation of combinational logic circuits using ROM, PLA, PAL
UNIT V
SYNCHRONOUS AND ASYNCHRONOUS SEQUENTIAL CIRCUITS
12
Synchronous Sequential Circuits:
General Model – Classification – Design – Use of
Algorithmic State Machine – Analysis of Synchronous Sequential
Circuits
Asynchronous Sequential Circuits: Design of fundamental mode and pulse mode
circuits – Incompletely specified State Machines
– Problems in Asynchronous Circuits – Design of Hazard Free Switching
circuits. Design of Combinational and Sequential
circuits using VERILOG
TUTORIAL =15, TOTAL : 60 PERIODS
TEXT BOOKS
1. M. Morris Mano, Digital Design, 3rd Edition, Prentice Hall of India Pvt. Ltd., 2003 / Pearson Education (Singapore)
Pvt. Ltd., New Delhi, 2003.
2. S. Salivahanan and S. Arivazhagan, Digital Circuits and Design, 3rd Edition., Vikas
Publishing House Pvt. Ltd, New
Delhi, 2006
REFERENCES
1. John F.Wakerly, Digital Design, Fourth Edition, Pearson/PHI, 2006
2. John.M Yarbrough, Digital Logic Applications and Design, Thomson Learning, 2002.
3.
Charles H.Roth. Fundamentals of Logic Design, Thomson Learning, 2003.
4. Donald P.Leach and Albert Paul Malvino, Digital Principles and Applications, 6th
Edition, TMH, 2003.
5.
William
H.
Gothmann, Digital Electronics, 2nd Edition, PHI, 1982.
6. Thomas L. Floyd, Digital Fundamentals, 8th Edition, Pearson Education Inc, New
Delhi, 2003
7. Donald D.Givone, Digital Principles and Design, TMH, 2003.
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