ELEC 225 Class Notes, Fall 2008

August 27: Questions about background and What is new in ELEC 225?

September 22:

• See Homework 5 for a list of topics for Exam 1 on Sept. 29.
• Solution to Problem 3.52

September 22 and 24: Notes on the node-voltage method

September 29: Solution to Exam 1 and Histogram of scores

October 1: Notes on the mesh-current method

October 8:

• An optional session for help with solving simultaneous equations with your calculator will be held as follows:
  Thursday, October 16, 7-8 PM in Dana 307.
• Methods for finding Thevenin model

October 22: Internal circuit diagram for 741 op amp

October 29: Opportunities for work with the Classroom and Event Support Group

November 3: Example of op amp analysis with more realistic model

November 5:

• Exam 2 will be on Monday, November 10. The exam will be closed-book and closed-notes, and will emphasize the topics from homework assignments 5 through 8 (Chapters 4 and 5). The specific topics include the following:
  • Circuit analysis with the mesh-current method (and node-voltage method)
  • Source transformations
  • Thevenin and Norton equivalent circuits
  • Power delivered to a load and maximum power transfer
  • Superposition
  • Operational amplifier circuits
    • Useful circuits, such as buffer (or voltage follower, isolation amplifier), inverting amp., noninverting amp., summing amp., difference amp.
    • Ideal model for circuits with negative feedback
    • Conditions for saturation
    • More realistic model with finite gain, finite input resistance, and nonzero output resistance

November 12:

• Solution to Exam 2: in class and take home
• Review of sinusoids

November 17:

• New time for ELEC 226 lab in spring, 2009?
• Sinusoidal response of circuits

November 20:

• We have arranged sessions that will be conducted by the Career Development Center (CDC) staff to help you find internships for the summer of 2009. The sessions will be on Thursday, Nov. 20 at 9-10 AM and 1-2 PM in Dana 307. We do not have ELEC 225 lab on that day.
• The CDC also offers "Internships 101" every Wednesday at noon in the CDC (Botany Building along 7th Street). This is a 30 minute overview session that explains how to get started and the various steps in an internship search. The CDC has a web site for internships:
  CDC Internships

December 1 and 3:

• Ten Favorite Columns By Robert W. Lucky
• IEEE Honors the People Behind Everyday Technologies
• Chapter 6 review
• Illustrations of sinusoids and phasors
• Rotating phasors
• Optional sessions for help with using your calculator to perform complex number operations will be held as follows:
  Wednesday, Dec. 3 and Thursday, Dec. 4, 8-9 PM in Dana 305.

December 8:

• The final exam for ELEC 225 will be on Monday, Dec. 15 from 8:00 - 11:00 AM in the classroom that we meet for lectures, Dana 221.
  The exam will be cumulative and it will be open-book and open-notes. You should also bring a calculator.

• Please contact me if you would like to meet during the week of Dec. 8 and we will arrange a meeting time. I will be available in my office on Friday, Dec. 12 from 2-4 PM.

December 12: The following link contains a nice review of phasors, impedance, and circuit analysis:
http://web.cecs.pdx.edu/~prasads/Phasors.pdf