UNIT I          BASIC CONCEPTS                                                                                                       9

Review of number systems-representation-conversions, Review of Boolean algebra- theorems, sum of product and product of sum simplification, canonical forms min term and max term, Simplification of Boolean expressions-Karnaugh map, completely and incompletely specified functions, Implementation of Boolean expressions using universal gates ,Tabulation methods.

UNIT II         COMBINATIONAL LOGIC CIRCUITS                                                                          9

Problem formulation and design of combinational circuits – Code-Converters, Half and Full Adders, Binary Parallel Adder – Carry look ahead Adder, BCD Adder, Magnitude Comparator, Decoder, Encoder, Priority Encoder, Mux/Demux, Case study: Digital trans-receiver / 8 bit Arithmetic and logic unit, Parity Generator/Checker, Seven Segment display decoder

UNIT III        SYNCHRONOUS SEQUENTIAL CIRCUITS                                                                9

Latches, Flip flops – SR, JK, T, D, Master/Slave FF, Triggering of FF, Analysis and design of clocked sequential circuits – Design – Moore/Mealy models, state minimization, state assignment,lock – out condition circuit implementation – Counters, Ripple Counters, Ring Counters, Shift registers, Universal Shift Register. Model Development: Designing of rolling display/real time clock

UNIT IV        ASYNCHRONOUS SEQUENTIAL CIRCUITS                                                             9

Stable and Unstable states, output specifications, cycles and races, state reduction, race free assignments, Hazards, Essential Hazards, Fundamental and Pulse mode sequential circuits, Design of Hazard free circuits.

UNIT V         LOGIC FAMILIES AND PROGRAMMABLE LOGIC DEVICES                                  9

Logic families- Propagation Delay, Fan – In and Fan – Out – Noise Margin – RTL ,TTL,ECL, CMOS – Comparison of Logic families – Implementation of combinational logic/sequential logic design using standard ICs, PROM, PLA and PAL, basic memory, static ROM,PROM,EPROM,EEPROM EAPROM.


PRACTICAL EXERCISES :                                                                                           30 PERIODS

  1. Design of adders and subtractors & code


  1. Design of Multiplexers &
  2. Design of Encoders and
  3. Design of Magnitude Comparators
  4. Design and implementation of counters using flip-flops
  5. Design and implementation of shift



At the end of the course the students will be able to


CO1: Use Boolean algebra and simplification procedures relevant to digital logic. CO2: Design various combinational digital circuits using logic gates.

CO3:Analyse and design synchronous sequential circuits. CO4: Analyse and design asynchronous sequential circuits. . CO5: Build logic gates and use programmable devices



  1. Morris Mano and Michael D. Ciletti, ‘Digital Design’, Pearson, 5th Edition, 2013.(Unit – I



  1. Charles Roth, Jr, ‘Fundamentals of Logic Design’, Jaico Books, 4th Edition, 2002.
  2. William Fletcher, “An Engineering Approach to Digital Design”, Prentice- Hall of India, 1980.
  3. Floyd L., “Digital Fundamentals”, Charles E. Merril publishing company,1982.
  4. F. Wakerly, “Digital Design Principles and Practices”, Pearson Education, 4 th Edition,2007.

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