Digital Circuit / Digital Logic Design

Electronics / E&TC  Digital Circuit / Digital Logic Design

Course Objectives: 

To make the students understand 

  1. The fundamental principles of two-valued logic and various devices used to implement logical operations on variables. 
  1. Boolean algebra, Karnaugh maps and its application to the design and characterization of digital circuits.
  1. To analyze logic processes and implement logical operations using combinational logic circuits. 
  1. The principles of logic design and use of simple memory devices, flip-flops, and sequential circuits. 
  1. Concepts of sequential circuits and to analyze sequential systems in terms of state machines. 
  1. System design approach using programmable logic devices

Course Outcomes: 

On completion of the course, learner will be able to - 

  1. CO1: Identify and prevent various hazards and timing problems in a digital design. 
  1. CO2: Use the basic logic gates and various reduction techniques of digital logic circuit. 
  1. CO3: Analyze, design and implement combinational logic circuits. 
  1. CO4: Analyze, design and implement sequential circuits. 
  1. CO5: Differentiate between Mealy and Moore machines. 
  1. CO6: Analyze digital system design using PLD.

Course Content:

Unit I Digital Logic Families (05 Hrs) 

Classification and Characteristics of digital Logic Families: 

Speed, power dissipation, figure of merit, fan in, fan out, current, voltage, noise immunity, operating temperatures and power supply requirements. 

TTL logic. 

Operation of TTL NAND gate, active pull up, wired AND, open collector output, unconnected inputs. Tri-State logic. 

CMOS logic: 

CMOS inverter, NAND, NOR gates, unconnected inputs, wired logic, open drain output. Interfacing CMOS and TTL, Data sheet specifications.

Unit II Combinational Logic Design (08 Hrs) 

Definition of combinational logic, 
canonical forms, Standard representations for logic functions, 
k-map representation of logic functions (SOP and POS forms), minimization of logical functions for min-terms and max-terms (upto 4 variables), don’t care conditions, 
Design Examples: Arithmetic Circuits, BCD to 7 segment decoder, Code converters. 
Introduction to Quine- McCluskey method, Quine McCluskey using don’t care terms, Reduced prime implicants Tables.

Unit III Combinational Circuits (06 Hrs) 

Adders and their use as subtractor, look ahead carry, ALU, Digital Comparator, 
Parity generators/checkers, 
Multiplexers and their use in combinational logic designs, multiplexer trees, 
Demultiplexers and their use in combinational logic designs, 
Decoders, Demultiplexer trees.

Unit IV Sequential Logic Design (08 Hrs) 

1 Bit Memory Cell, Clocked SR, JK, MS J-K flip flop, D and T flip-flops. 
Use of preset and clear terminals, hold and setup time and metastability. 
Excitation Table for flip flop, Conversion of flip flops, 
Typical data sheet specifications of Flip flop application of Flip flops. 
Registers, Shift registers, Counters (ring counters, twisted ring counters), ripple counters, Mod-n counters, up/down counters, synchronous counters, 
lock out, Clock Skew, Clock jitter. Effect on synchronous designs, Sequence Generators.

Unit V State Machines (07 Hrs) 

Basic design steps- State diagram, State table, State reduction, State assignment, 
Mealy and Moore machines representation, Implementation, 
finite state machine implementation, Sequence detector. 
Introduction to Algorithmic state machines- construction of ASM chart and realization for sequential circuits 

Unit VI Programmable Logic Devices (08 Hrs) 

Programmable logic devices: Detail architecture, 
Study of PROM, PAL, PLA, 
General Architecture, features and typical specifications of FPGA and CPLD. 
Semiconductor memories: memory organization and operation, expanding memory size, Classification and characteristics of memories, RAM ROM, EPROM, EEPROM, NVRAM, SRAM, and DRAM. Designing combinational circuits using PLDs.

Learning Resources 

Text Books: 

1. R.P. Jain, “Modern Digital Electronics”, Tata McGraw Hill Publication, 3 rd Edition. 

2. Thomas Floyd, “Digital Electronics”, 11th Edition. 

3. M. Morris Mano, “Digital Logic and Computer Design”, Prentice Hall of India, 4 th Edition. 

4. Taub and Schilling, “Digital Principles and Applications,” TMH. 

Reference Books: 

1. Anand Kumar, “Fundamentals of Digital Circuits”, Prentice Hall of India, 1 st Edition. 
2. J. F. Wakerly, “Digital Design- Principles and Practices,”, Pearson, 3 rd Edition. 
3. M. M. Mano, “Digital Design,” Prentice Hall India. 

MOOC / NPTEL Courses: 

1. Digital Circuit

2. Digital Circuits and Systems

3. Digital Electronics Circuits

Reference : SPPU SE E&TC Syllabus 
By Prof Shrikant B Shelke +917218143388
 

Contact Us:

Online Teaching / Training for Engineering students 

Mobile Number:

+917218143388
+917796692552

Email:

Shelkesb17.extc@coep.ac.in

Links:

wa.me/917796692552

wa.me/917218143388

 

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