Linear Circuits 1 - 03 - Current Sources

What Is a Current Source, and How Does It Work?
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1,329 students
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Fundamentals of Electric Circuits
How a Current Source Works
Ground Location Is Not That Important


  • High School or College Physics
  • We Also Recommend Our Previous Linear Circuits Classes


Day 3 of Linear Circuits.  Students are introduced to current sources.  It turns out, current sources only have one job.  That never changes, and as long as we remember that, they are pretty easy to work with.

The material covers all of the lecture material from a third lecture in a traditional, sophomore-level linear circuits class.

Who this course is for:

  • Beginner Engineering and Physics Students

Course content

1 section13 lectures35m total length
  • Agenda
  • A Word on Linear Circuits Textbooks....
  • Review
  • Current Sources Have One Job
  • Changing Signs = Changing Directions
  • A First Example
  • An Example with Two Current Sources
  • An Example with Two Different Ground Locations
  • An Example with Negative Current Sources and Two Different Grounds
  • Another Example with Two Current Sources
  • An Example with Three Current Sources
  • Current Sources in Series? What Could Go Wrong???
  • Summary


2019 ASEE Engineering Professor of the Year
Mark Budnik
  • 4.7 Instructor Rating
  • 4,048 Reviews
  • 73,694 Students
  • 31 Courses

Mark Budnik is a nearly 30 year veteran of the electronics industry and academia.  He holds the positions of the Paul H. Brandt Professor at Valparaiso University and the Electrical Engineering Program Director and Irwin Chair of Engineering at Houghton College.  He has won numerous institution, regional, and national teaching awards including the 2019 American Society for Engineering Education Outstanding Teacher Medal.

Brandt Professor of Engineering, Valparaiso University
Mark M. Budnik
  • 4.7 Instructor Rating
  • 4,016 Reviews
  • 73,701 Students
  • 30 Courses

Mark M. Budnik is the Paul H. Brandt Professor of Engineering at Valparaiso University. He received his bachelor of science degree in electrical engineering from the University of Illinois and his master of science and doctoral degrees in electrical engineering from Purdue University.

Prior to joining the faculty at Valparaiso University in 2006, Mark worked in the semiconductor industry, culminating as a Staff Engineer and the Director of White Goods and Motor Control at Hitachi Semiconductor. In these roles, he had a unique opportunity to work closely with a diverse customer base to identify and establish a number of best practices in embedded systems education.

In his career, he received multiple educational awards from academia and industry including ST Microelectronics, National Semiconductor, Hitachi Semiconductor, Valparaiso University, and the American Society for Engineering Education (ASEE). Most recently, Mark was an ASEE Section Outstanding Teacher of the Year and a finalist for the 2015 ASEE National Outstanding Teaching Award.

Mark is the author of more than fifty book chapters, journal articles, and conference proceedings and the recipient of five best paper/presentation awards. He is a Senior Member of the IEEE and a Fellow of the International Symposium on Quality Electronic Design.