Digital Logic Circuits

EE3302

DIGITAL LOGIC CIRCUITS

COURSE OBJECTIVES:

• To introduce the fundamentals of combinational and sequential digital circuits.

• To study various number systems and to simplify the mathematical expressions using Boolean functions word problems

• To study implementation of combinational circuits using Gates' and MSI Devices.

• To study the design of various synchronous and asynchronous circuits

• To introduce digital simulation techniques for development of application oriented logic circuit

UNIT I

NUMBER SYSTEMS AND DIGITAL LOGIC FAMILIES

Number system, error detection, corrections & codes conversions, Boolean algebra: De- Morgan's theorem, switching functions and minimization using K-maps & Quine McCluskey method - Digital Logic Families -comparison of RTL, DTL, TTL, ECL and MOS families - operation, characteristics of digital logic family.

UNIT II

COMBINATIONAL CIRCUITS

Combinational logic - representation of logic functions-SOP and POS forms, K-map representations - minimization using K maps - simplification and implementation of combinational logic - multiplexers and de multiplexers code converters, adders, subtractors, Encoders and Decoders.

UNIT III

SYNCHRONOUS SEQUENTIAL CIRCUITS

Sequential logic- SR, JK, D and T flip flops - level triggering and edge triggering - counters - asynchronous and synchronous type Modulo counters - Shift registers design of synchronous sequential circuits - Moore and Mealy models- Counters, state diagram; state reduction; state assignment.

UNIT IV

ASYNCHRONOUS SEQUENTIAL CIRCUITS AND PROGRAMMABILITY LOGIC DEVICES

Asynchronous sequential logic Circuits-Transition stability, flow stability-race conditions, hazards &errors in digital circuits; analysis of asynchronous sequential logic circuits- introduction to Programmability Logic Devices: PROM - PLA-PAL, CPLD-FPGA.

UNIT V

VHDL

UNL Design combinational logic - Sequential circuit - Operators - Introduction to Packages - Subprograms - Test bench. (Simulation /Tutorial Examples: adders, counters, flip flops, Multiplexers & De multiplexers).

TOTAL: 45 PERIODS

Course Outcomes:

Upon the successful completion of the course, students will be able to:

CO1: Explain various number systems and characteristics of digital logic families

CO2: Apply K-maps and Quine McCluskey methods to simplify the given Boolean expressions

CO3: Explain the implementation of combinational circuit such as multiplexers and de multiplexers - code converters, adders, subtractors, Encoders and Decoders

CO4: Design various synchronous and asynchronous circuits using Flip Flops

CO5: Explain asynchronous sequential circuits and programmable logic devices

CO6: Use VHDL for simulating and testing RTL, combinatorial and sequential circuits

TEXTBOOKS:

1. Morris Mano.M, 'Digital Logic and Computer Design', Prentice Hall of India, 3rd Edition, 2005.

2. Donald D.Givone, 'Digital Principles and Design', Tata McGraw Hill, 1st Edition, 2003

3. Thomas L Floyd, 'Digital fundamentals', Pearson Education Limited, 11th Edition, 2018

TEXTBOOKS:

1. Morris Mano.M, 'Digital Logic and Computer Design', Prentice Hall of India, 3rd Edition, 2005.

2. Donald D.Givone, 'Digital Principles and Design', Tata McGraw Hill, 1st Edition, 2003

3. Thomas L Floyd, 'Digital fundamentals', Pearson Education Limited, 11th Edition, 2018

REFERENCES:

1. Tocci R.J., Neal S. Widmer, 'Digital Systems: Principles and Applications', Pearson Education Asia, 12th Edition, 2017.

2. Donald P Leach, Albert Paul Malvino, Goutam Sha, 'Digital Principles and Applications', Tata McGraw Hill, 7th Edition, 2010.