PHYS 431: Analog Electronics (Winter 2018)

Instructor: Daniel A. Steck
Office: 277 Willamette      Phone: 346-5313      email:
Office hours: walk-in and by appointment
Teaching Assistant:
        Cameron Dennis     office: WIL 373     office hour: W 3:00-4:00 (Rm 11 lab weeks, else 373)         email:
Course home page:           qr

Schedule: TTh 10:00-11:50, 318 Willamette, plus a 3-hour lab section (11 WIL)
Course reference number: 25567
Credits: 4
Prerequisites: PHYS 203 or equivalent; knowledge of complex numbers; MATH 256

Links: news, lab sections, textbook, course reading and notes, labs/homework sets and keys.

Course overview

As a scientist, your goals in studying electronics are somewhat different than, say, an electrical engineer studying the same subject. Without delving into too much of the details of how electronic components work, you need to have simple conceptual models that will allow you to understand schematics well enough to troubleshoot a misbehaving instrument, design a simple circuit to filter a signal, or track down and eliminate noise in a lab measurement. Basically, things that will help you do physics in the laboratory. We will study electronic components and circuits at this basic level, and cover some of the more “realistic” features of components that you need to understand to design and work with more precise circuits, as well as the tricks and techniques you need to make circuits work.

See the tentative syllabus below for a preliminary list of topics we will cover.

Lab: The whole point of electronics is to put theory to work and make (working!) electronic circuits. Thus, the lab component of the course is critical. The goal of the labs is to give you a functional knowledge of electronics and to get you comfortable working with electronic devices.

You will need to attend one 3-hour lab component during some weeks (see syllabus below for schedule). There will be two lab sections, and we will arrange these during the second week of class.

You should also obtain a laboratory notebook (i.e., as you would use in a real laboratory), permanently bound with quad-ruled pages (like this). This is the primary record of your lab work, and you should record all your notes and measurements in this book.

Texts: There is no required textbook to purchase for this course. The main reference for this course will be online notes posted here. Another good, free reference is a set of notes by Ray Frey, posted here.

There are a few books that are good introductions to electronics, and you might consider picking up one or more of these:


Grades for the course will be based on homework, two mid-term exams, and a final exam. The relative weights will be as follows:

Homework: will be assigned weekly and each assignment will be due in class one week after it is assigned. Thereafter, late homework will be accepted, but at a 25% penalty for each 24 hour period it is turned in late. Partial assignments may be turned in, and only the late portion will be penalized.

Mid-term exam 1: in class, Thursday, February 1.

Mid-term exam 2: in class, Thursday, March 1.

Final exam: The final exam will be held Friday, March 23, 8:00-10:00 am(!), in 318 Willamette.

Labs: There are 5 total lab projects. For each lab, you should turn in a brief report on your work. This is not the same as what you record in your lab notebook. The report should summarize the work you did in the lab. Provide headings for your entries that correspond to the sections in the lab instructions. Clearly indicate the location of required material in your report. Note any unusual or unexpected results. You should turn in your reports in the box in room 11 at least 48 hours before the next lab session (or the final exam, in the case of the last lab).

Pass/fail grading option: a passing grade requires the equivalent of a C- average grade on all coursework (homework, labs, and exams).

Computer access

Some of the homework will require access to a computer for basic calculations and plotting (in any of several higher-level packages such as Mathematica, Maple, Matlab, Octave, Mathcad, etc.). I will use Mathematica for examples because of its availability at UO, but it is not necessarily the best choice for any particular problem. Contact the instructor as soon as possible if you do not already have access to such resources.


Tuesday Thursday Lab
9 January
Resistors and Networks
11 January
Capacitors and Inductors

16 January
Complex Impedance
18 January
Resonant Circuits

23 January
25 January
Bipolar Transistors
Lab 1
Linear Components
30 January
More Transistors
1 February
Midterm Exam 1

6 February
Differential Amplifiers
8 February
Transistor Details
Lab 2
13 February
15 February
Op-Amp Basics
Lab 3
Transistor Basics
20 February
Integrators, Differentiators
22 February
Instrumentation Amps
Lab 4
Transistor Circuits
27 February
Op-Amp Bias and Power
1 March
Midterm Exam 2

6 March
Op-Amp Gain
8 March
Bandwidth, Slew, Stability
Lab 5
Introduction to Op-Amps
13 March
Comparators, Oscillators
15 March
PID Control
Lab 6
Op-Amp Circuits

Other important dates:
Last day to drop without a W: 15 January
Last day to register: 17 January
Last day to withdraw: 25 February