147302 Digital Electronics Syllabus - Anna University

DE - Digital Electronics Syllabus
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147302 DIGITAL ELECTRONICS 3 1 0 4

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 9

Minimization Techniques: Boolean postulates and laws – De-Morgan’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 - Quine-McCluskey method of minimization.

Logic Gates: AND, OR, NOT, NAND, NOR, Exclusive–OR and Exclusive–NORImplementations 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 9

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 9

Latches, Flip-flops - SR, JK, D, T, and Master-Slave – 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 diagramState table –State minimization –State assignment - Excitation table and maps-Circuit 

implementation - Modulo–n counter, Registers – shift registers - Universal shift registers 

– Shift register counters – Ring counter – Shift counters - Sequence generators.6

UNIT IV MEMORY DEVICES 9

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 CellBipolar 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 AYNCHRONOUS SEQUENTIAL CIRCUITS 9

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 Hrs. TOTAL : 60 Hrs.

TEXT BOOKS

1. M. Morris Mano, Digital Design, 3

rd

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, 3

rd

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, 6

th

Edition, TMH, 2003.

5. William H. Gothmann, Digital Electronics, 2

nd

Edition, PHI, 1982.

6. Thomas L. Floyd, Digital Fundamentals, 8

th

Edition, Pearson Education Inc, New 

Delhi, 2003

7. Donald D.Givone, Digital Principles and Design, TMH, 2003.7

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