Digital Circuit Fundamentals

I.     Course Prefix/Number: ELT 221

       Course Name: Digital Circuit Fundamentals

       Credits: 3 (2 lecture; 2 lab)

II.    Prerequisite

Recommended: ELT 101 or ELT 106

III.   Course (Catalog) Description

Course involves study of discrete devices and integrated circuits. Content includes application of inverters, AND, OR, NAND, and NOR gates, and all circuits necessary to operation of a computer including microprocessors. Focus is on analysis of functions from a systems and circuit standpoint.

IV.   Learning Objectives

Student will learn to:

  1. Design digital circuits using different numbering systems.
  2. Examine the difference between analog and digital circuits
  3. Utilize computer simulation software to model digital circuits
  4. Communicate effectively in a technical and non-technical environment
  5. Identify and demonstrate the purpose and application of various type of gates.
  6. Explain the important electrical characteristics of digital gates and signals
  7. Use Boolean logic concepts to design and construct simple digital circuits.

V.    Academic Integrity and Student Conduct

Students and employees at Oakton Community College are required to demonstrate academic integrity and follow Oakton's Code of Academic Conduct. This code prohibits:

• cheating,
• plagiarism (turning in work not written by you, or lacking proper citation),
• falsification and fabrication (lying or distorting the truth),
• helping others to cheat,
• unauthorized changes on official documents,
• pretending to be someone else or having someone else pretend to be you,
• making or accepting bribes, special favors, or threats, and
• any other behavior that violates academic integrity.

There are serious consequences to violations of the academic integrity policy. Oakton's policies and procedures provide students a fair hearing if a complaint is made against you. If you are found to have violated the policy, the minimum penalty is failure on the assignment and, a disciplinary record will be established and kept on file in the office of the Vice President for Student Affairs for a period of 3 years.

Please review the Code of Academic Conduct and the Code of Student Conduct, both located online at

VI.   Sequence of Topics

  1. Number systems and Codes
  2. Digital Electronics Signal and Switches
  3. Basic Logic Gates
  4. Boolean Algebra& Reduction techniques
  5. XOR and XNOR Gates
  6. Programmable Logic Devices
  7. Arithmetic Operations and Circuits
  8. Decoding /Encoding
  9. Cod Converters
  10. Multiplexer/Demultiplexers
  11. Flip-Flops and Registers
  12. Counter Circuits

VII.  Methods of Instruction

The course will include lecture, lab and problem sessions.  The lectures cover the textbook material with examples, questions, circuits illustrations and problem solving.  The lab includes setting up logic circuits implementing and proving the theory.
Course may be taught as face-to-face, hybrid or online course.

VIII. Course Practices Required

  1. The students are required to attend all class lecture and lab sessions.
  2. To do all assigned homework and lab projects.

IX.   Instructional Materials

Note: Current textbook information for each course and section is available on Oakton's Schedule of Classes.

X.    Methods of Evaluating Student Progress

Four to five exams 70%
Lab work 20%
Homework 10%
A:  90 - 100
B: 80 - 89
C: 70 - 79
D: 60 - 69
F: Below 60

XI.   Other Course Information

Attendance is required.  Participation and discussion is encouraged.  No late assignment will be accepted.  The homework is due the following session.  A make‑up test may be given on the following two days to students who missed it for a good reason.  If the student misses the make‑up test also, the lowest of the class or his own lowest grade will be given.

If you have a documented learning, psychological, or physical disability you may be entitled to reasonable academic accommodations or services. To request accommodations or services, contact the Access and Disability Resource Center at the Des Plaines or Skokie campus. All students are expected to fulfill essential course requirements. The College will not waive any essential skill or requirement of a course or degree program.

Oakton Community College is committed to maintaining a campus environment emphasizing the dignity and worth of all members of the community, and complies with all federal and state Title IX requirements.

Resources and support for
  • pregnancy-related and parenting accommodations; and
  • victims of sexual misconduct
can be found at

Resources and support for LGBTQ+ students can be found at

Electronic video and/or audio recording is not permitted during class unless the student obtains written permission from the instructor. In cases where recordings are allowed, such content is restricted to personal use only. Any distribution of such recordings is strictly prohibited. Personal use is defined as use by an individual student for the purpose of studying or completing course assignments.

For students who have been approved for audio and/or video recording of lectures and other classroom activities as a reasonable accommodation by Oakton’s Access Disabilities Resource Center (ADRC), applicable federal law requires instructors to permit those recordings. Such recordings are also limited to personal use. Any distribution of such recordings is strictly prohibited.

Violation of this policy will result in disciplinary action through the Code of Student Conduct.