Department of Physical Science and Engineering
Engineering Program
Welcome to Digital Logic Design!
EGR 244 Digital Logic Design
Reference No. 4268
Spring 2007

INSTRUCTOR: Dr. Scott D. Johnson, Associate Professor, Engineering Coordinator, Physical Sciences and Engineering


OTHER LOCATIONS: CH-308 (Faculty Resource Room) and CH-100 (Department)

PHONE NUMBERS: 301-386-7536 (Office) or 301-322-0420 (Department Main Line)


To facilitate e-mail communication with me, please include the following code: CCGP07 along with the course designation (EGR 244) in the subject of any e-mails to me during the Spring 2007 semester.

Example: EGR244: Need help on VHDL: CCGP07


OFFICE HOURS: MW 7:15-7:45pm; TTh 5:35-7:30pm, by appointment all other times


To understand modern electrical circuits a thorough understanding of digital circuits is necessary. This course works towards that goal by introducing the student to the theory and practice of logic (digital) circuits.

Material that is covered includes but is not limited to the following subjects: Number systems and base conversions, Boolean algebra, truth tables, logic circuits and implementation, Karnaugh maps (and other strategies of minimization), sequential logic, flip-flops, registers, counters, processors (simple), programmable logic devices, and characteristics of logic families.

This course emphasizes the elements used to create logic circuits and the software (CAD) used to design and simulate logic circuits.

Team work along with communication skills (oral, written, and graphical) are exercised throughout the course.


PHY 103, MAT 242 and EGR 101


Upon successful completion of the course a student will be able to

  1. Describe and apply fundamental circuit elements in a design of a simple logic circuit.

  2. Identify and describe logic building blocks.

  3. Demonstrate the ability to understand specification sheets.

  4. Design and analyze logic circuits (combinational and synchronous at a minimum).

  5. Use a CAD software to design and test a logic circuit of moderate complexity.

  6. Sketch a digital system design of complex logic circuit.

  7. Demonstrate the ability to write and execute a timing simulation.


Fundamentals of Digital Logic with VHDL Design with CD-ROM 2nd Edition.  Brown, Stephen and Vranesic, Zvonko.  McGraw-Hill (2005).
Schaum's Outline of Digital Principles 3rd Edition.  Tokheim, Roger L.  McGraw-Hill (1994).


Pocket Book for Technical Writing for Engineers and Scientists 3rd Edition .  Finkelstein, Leo.  McGraw-Hill (2007).
MATLAB Tutorial CD: Learning MATLAB Superfast .  Daku, Brian.  John Wiley & Sons (2005).


  1. Software that is provided in the textbook.

  2. Bound Laboratory book. Pages are to remain in the book and are NEVER to be torn out.

  3. Pens, Pencils, Eraser, Straight edge, Paper, and Calculator are required for every class.


As with any class an amount of time at least equivalent to two times the credit hours is expected to be performed for homework and labs. Please allot sufficient time for homework.

Homework will be assigned each week including the first week.


Evaluation of student performance is to be based on:

  1. Unannounced quizzes and homework will account for approximately 25% of the semester grade. Homework consists of essays that are to be written in standard English format and problem sets.

  2. Two (mid-term and final) comprehensive in-class tests on digital circuits will account for approximately 25% of the semester grade.

  3. A design logic project with associated report will account for approximately 25% of the semester grade. This project is to be an original individual work. A grade of zero will be given to anyone who copies their projects.


  1. Homework is due at the start of class (or before) except for in-class projects.

  2. Laboratory work is to be submitted in appropriate binders follow any standard laboratory format (this will be reviewed in class).

  3. Make-up homework, quizzes, and/or tests are up to the discretion of the teacher (excused absences only). No makeup will be possible for laboratory work, sufficient time should be available to recover if an absence is necessary.


New topics are to be covered each week and include but are not limited to the following subjects. This outline is subject to change.

Week 1 Digital Design

Week 2 Logic Circuits

Week 3 CAD/VHDL coding

Week 4 Implementation Technology

Week 5 Logic function optimization

Week 6 Arithmetic Circuits

Week 7 Multiplexers, Decoders, Encoders, and other logic circuit building blocks

Week 8 Flip-flops, registers, counters, and other logic circuit building blocks

Week 9 Synchronous Sequential Circuits

Week 10 Asynchronous Sequential Circuits

Week 11 Digital System Design: Putting it all together

Week 12 Digital System Design

Week 13 Testing of Logic Circuits:

Week 14 Testing of Logic Circuits

Week 15 CAD Tools

A new chapter should be read each week usually following the title of the topic above. Problems will be based off of the reading.

Quizzes will all be unannounced so be prepared.

Tests will be announced a week before and will depend on our progress in the classroom.


  1. Food and drink in limited quantities (snacks, not meals) are permitted in restricted areas (not near electronics) and will be revoked if proper cleanliness is found wanting.

  2. Cell phones must be in vibrate mode and are only to be answered for emergencies (step outside please).

  3. Common courtesy is to apply at all times.


Last day to apply for spring graduation

Thursday, February 15

President's Day. COLLEGE CLOSED

Monday, February 19

Last day to change from "audit to credit" or "credit to audit" for full-semester classes

Friday, February 23

Midterm - middle of semester; class will speed up

Tuesday, March 20

Spring break. COLLEGE CLOSED for the week.

Saturday-Friday, April 7 to April 13

Last day to withdraw from full-semester classes

Friday, April 20

Last Day of regular classes for the Spring Semester

Wednesday, May 9

Final exam period/last week of classes

Tuesday, May 15


No lab (that is a separate course offered in the summer). Computer programming maybe done in class (CH-307) on the portable PCs during designated time periods.