Digital Logics

Digital Logic focuses on the design and analysis of digital circuits. It covers number systems, Boolean algebra, logic gates, combinational and sequential circuits, forming the foundation of computer hardware and digital system design.

Digital Logic

Course Title: Digital Logic

Course No: ENEX 152

Nature of the Course: Theory + Lab

Semester: 2

Full Marks: 40 + 60 + 50

Pass Marks: 16 + 24 + 20

Credit Hours: 3

Course Description

This course focuses on the fundamental concepts of digital logic, spanning number systems, logic gates, and circuit design. It systematically examines Boolean algebra and K-maps, moves through combinational and sequential logic circuits, and progresses into registers, counters, and sequential machine design, concluding in the study of digital integrated circuits and their applications.

Course Objectives

This course mainly focuses on study, analyze basic principle, design and applications of digital circuitries in various fields. It also shows an important branch of the electronics that revolutionizes the modern digital world.

Course Contents

1. Introduction

5 hrs7 marks

1.1. Digital versus analog signals

1.2. Logic level diagram

1.3. Digital integrated circuits (ICs)

1.4. Clock triggering systems

1.5. Digital system applications

1.6. Digital codes and conversions

Decimal, binary, octal and hexadecimal codes

BCD code

Excess-3 code

Gray code

Examples of code conversions

1.7. Alphanumeric codes: ASCII code and EBCDIC code

1.8. 1's complement and 2's complement

1.9. Signed number representation

2. Logic Gates

3 hrs4 marks

2.1. Basic gates and their equivalents

2.2. Universal gates and their equivalents

2.3. Exclusive gates and their equivalents

2.4. Positive and negative logic

2.5. De'Morgan's laws

2.6. Applications of logic gates

3. Boolean Algebra and K-Maps

4 hrs5 marks

3.1. Boolean algebra and its laws

3.2. Simplifications of Boolean expressions

3.3. Minterms and maxterms

3.4. Sum-of-product and product-of-sum methods

3.5. Truth tables and Karnaugh map

3.6. Four variables K-maps

3.7. Cell, pairs, quads and octets

3.8. Rolling, envelop effects and redundant groups

3.9. Don't care conditions

4. Combinational Logic Circuits

8 hrs10 marks

4.1. Design procedures

4.2. Half-adder and full-adder

4.3. Half-subtractor and full-subtractor

4.4. Ripple carry adders and fast adders

4.5. Multiplexers design

4.6. Demultiplexers design

4.7. Basic encoders

4.8. Priority encoders

4.9. Encoder designs

4.10. Decoder designs

4.11. BCD-to-decimal decoder

4.12. Seven-segment decoder

4.13. Magnitude comparators

5. Sequential Logic Circuits

5 hrs7 marks

5.1. Latches and flip-flops: SR, D, T and JK

5.2. Excitation tables, characteristic equations

5.3. Master-slave flip-flops

5.4. Flip-flop timing diagrams

5.5. Flip-flops as the state machines

5.6. Flip-flop conversions

5.7. Flip-flop applications

6. Registers and Counters

7 hrs10 marks

6.1. Register fundamentals, register types

6.2. SISO, SIPO, PISO and PIPO registers

6.3. Data transfer timing diagrams

6.4. Asynchronous counters

6.5. Up, down and mod-n asynchronous counters

6.6. Synchronous counters

6.7. Up, down and mod-n synchronous counters

6.8. Register and counter applications

7. Sequential Machine Designs

8 hrs10 marks

7.1. Machine design procedures

7.2. Primitive state diagrams

7.3. Transition/flow tables

7.4. Redundant states

7.5. Pure binary assignment tables

7.6. Excitation maps

7.7. Realization of the models

7.8. Circuit diagram of synchronous machine

7.9. One-bit and two-bit input sequence detectors

8. Digital Integrated Circuits

5 hrs7 marks

8.1. BJT and MOSFET switching circuits

8.2. TTL parameters

8.3. TTL circuits: NAND, NOT, NOR

8.4. CMOS parameters

8.5. CMOS logic circuits: NAND, NOR, NOT

8.6. Three-state TTL devices

8.7. Digital devices applications

Multiplexing displays

Frequency counters

Time measurements

Laboratory Works

Practical sessions of 45 hours covering basic gates, De Morgan's law, encoders, decoders, multiplexers, demultiplexers, binary addition and subtraction, flip-flops, shift registers, ripple counters, and synchronous counters.

1.Basic Gates, Universal Gates and Exclusive Gates
2.De'Morgan's Law and Its Familiarization with NAND and NOR Gates
3.Encoders and Decoders
4.Multiplexers and Demultiplexers
5.Binary Addition and Subtraction
6.Latches, RS, and T Flip-Flops
7.D and JK Flip-Flop and Master-Slave Flip-Flop
8.Shift Registers
9.Circuit Realizations on Ripple Counters
10.Circuit Realizations on Synchronous Counters

Reference Books

1.Floyd, T. L. (2015). Digital fundamentals. Pearson Education.
2.Mano, M. M. (1995). Digital design (Latest Edition). Prentice Hall.
3.Leach, D.P., Malvino, A.P., Saha, G. (2012). Digital principles and applications. Tata McGraw-Hill Education.
4.Fletcher, W.I. (1980). An engineering approach to digital design (Latest Edition). Prentice-Hall.
5.Gothmann, W.H. (1982). Digital electronics: An introduction to theory and practice (Latest Edition). Prentice-Hall.

Notes:

This syllabus follows the official BEI curriculum of Tribhuwan University. In case of any doubt or revision, the university's published syllabus shall be considered authoritative. https://ioe.tu.edu.np/pages/electronics-engineering-curriculum-structure-2660

Digital Logics

Digital Logics

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TabFlux . Digital Logic . TU . BEI-NEW

Digital Logic

Course Description

Course Objectives

Course Contents

Laboratory Works

Reference Books

Notes:

Select University

Select Program

TabFlux . Digital Logic . TU . BEI-NEW

Digital Logic

Course Description

Course Objectives

Course Contents

Laboratory Works

Reference Books

Notes: