ECEN 2420, Spring 2016

Electronics for wireless

Instructors: Prof. Dimitra Psychogiou and  Zoya Popovic

 

Weekly update, January 16th, 2017:

 

-          Welcome to the world of wireless electronics!

-          What is this class about? You will learn how a superheterodyne transceiver works. This type of radio is extremely common, e.g. there are at least 5 in every cell phone. We will build a 7-MHz version that can support digital modulation in the form of Morse code. The goal is to learn analog electronics and applied electromagnetics through a fun and meaningful project.

-          The radio is called a NorCal40A and it is not simple, so it will take us an entire semester to build and you will learn a lot about circuits in general while doing it. Here is a circuit diagram RadioRx-Tx.pdf . Here is more information about the radio: NorCal 40A 40 meter CW Transceiver.pdf

-          All lab sessions will be held in the circuits lab on the 2nd floor. Sometimes we will have a recitation instead of a lab during the lab time. Attendance of the lab sessions is mandatory and any absences require a note from a doctor.

-          Here is the first homework: HW1-ECEN2420-S2017.pdf

 

 

Handouts:      

 

·         Interesting article about the first life-saving radio event in 1909 (before the Titanic): CQD.pdf

·         Here are some videos on soldering that are helpful, please watch at least one of them before we do soldering:

·         http://www.youtube.com/watch?v=I_NU2ruzyc4

·         http://www.sparkfun.com/tutorials/213

·         A little more about smaller packages/pins : http://www.sparkfun.com/tutorials/96

·         Here is a soldering writeup that you might find useful: Soldering Guide.pdf

Summary for soldering:

 

Previously posted material:

None at this point. Download LTSpice from here:

 http://www.linear.com/designtools/software/

 

Basic class information:

Lectures:        Mondays 4 – 5pm in 1B-32

Labs:              Monday and Wednesday, noon-2pm, in circuits lab

Textbook:       David Rutledge, The Electronics of Radio, Cambridge University Press, 1999, ISBN 0 521 64645 6 paperback

Undergraduate assistants: Megan Robinson, Samantha Williams

Graduate TAs and Office Hours: TBD

 

Instructors

Prof. Dimitra Psychogiou

ECOT 249

303-735-5204

Dimitra.Psychogiou@colorado.edu

Office hours: TBD

Prof. Zoya Popovic

ECOT 252

303-492-0374

zoya@colorado.edu

Office hours: TBD

 

Grading

Assignment

Percentage

Homework (in lab session)

40%

Final exam (written and oral)

30%

Midterm

15%

Participation

25%

Total

110%

 

 

Approximate course topic schedule (covered material will be highlighted in blue font):

 

Week

Topics

Chapters

Reading pages

1

01/18

 

Introduction and vocabulary for the class

Vocabulary, continued, Resistors

 

1, 2

 

1-24

2

01/23

 

Connections of resistors, Capacitors, RC circuits, Thevenin

Diodes, inductors, RL circuit

Homework 1

2

 

25-38

3

01/30

 

Phasors, RLC resonant circuits

Filters

Homework 2 (series resonant circuit, filter)

 3, 5

 

49-63

4

02/06

 

Filter design, crystals

Transformers

Homework 3 in LTSpice (filter)

5

 

97 - 114

5

02/13

 

Transformers, continued

Transistor switches

Homework 2 (series resonant circuit, filter)

6, 8

 

119-124

134-144

6

02/20

Transistor amplifiers

Homework 3

 9

 

154-168

7

02/27

 

Power amplifiers

Oscillators

Homework 4: IF and RF filter sub-boards

 10,11

 

204-221

8

03/06

 

Crystal oscillators

Mixers

Homework 5: TX switch and RF mixer sub-boards

11

226-228

229-242

9

03/13

 

Review (M, W)

Homework 6: TX and RX mixer sub-boards

In-class midterm on Monday, March 13th

 

 

10

03/20

 

Audio circuits

Receiver parameters (noise, dynamic range)

Homework 7: Driver, buffer and power amplifier sub-boards

 12

 

245-250

Spring break, No classes March 27-31

11

04/03

Transmission lines

Homework 8: Amplifier sub-boards, continued

13

 

250-256

12

04/10

Transmission lines, Antennas and propagation

Homework 9: Amplifier and TX mixer sub-boards

 14

 

274-294

13

04/17

Practice for amateur radio exam

Homework 10: RX mixer and audio amplifier

Weekend: Integration

 

 

14

04/24

Review, practice for exams

Finish radio integration

 

 

15

05/01

Amateur radio exam

Project presentations, last day of classes is May 5

 

 

Final exam: May 8th, 7:30 – 10pm

 

 

FAQs:

 

Q: How much time per week do I need to spend on this class?

A. One hour in lecture, 4 hours in lab and at least 4 hours outside of class on homework, reading and review.

Q: Is there a textbook for the course?

A. Yes. There is a paperback version.

Q: What will I know after the class that I do not know now? 

A. You will know how analog components work and how they are connected into simple and then more complicated circuits.

Q: What does “student participation” mean?

A. Read book in advance and be able to discuss material in class and in homework sessions. There will also be occasional participation assignments.  

Q: What will the homeworks look like?

A. Homeworks will be based on material from the textbook and occasionally from outside reading handouts which will be provided.

Q: What are the labs about?

A. Building a radio part by part, and then putting it together and demonstrating transmission and reception.

Q. Will we build the entire radio (with >200 parts) at once?

A: No, there are 8 separate small circuit boards that can be separately tested before they are inserted into a motherboard. These make up the following separate labs:

1.      Measure diode detector and get used to equipment, battery (2 lab sessions)

2.      Harmonic filter (1 lab session)

3.      IF filter (2)

4.      Switches (2)

5.      Transformers (1)

6.      Buffer, driver, filter, PA (3)

7.      VFO (2)

8.      AGC (2)

9.      Mixer, receive (1)

10.  Mixer, transmit (1)

11.  Mixer, BFO (2)

 

 

 

Standard rules:

 

Policies and Regulations:  The following policies and regulations apply for this course.

 

Honor Code. All students of the University of Colorado at Boulder are responsible for knowing and adhering to the academic integrity policy of the institution. Violations of this policy may include: cheating, plagiarism, aid of academic dishonesty, fabrication, lying, bribery, and threatening behavior. All incidents of academic misconduct shall be reported to the CU Honor Code Council (honor@colorado.edu, 303-725-2273). Students who are found to be in violation of the academic integrity policy will be subject to both academic sanctions from the faculty member and non-academic sanctions (including but not limited to university probation, suspension, or expulsion). Other information on the Honor Code can be found at
 
http://www.colorado.edu/policies/honor.html  
http://www.colorado.edu/academics/honorcode/

 

The instructor reserves the right to use anti-plagiarism software to help determine the originality of term papers.

 

Cell phones and PDAs. Out of respect for the students and instructors as well as to minimize interference to laboratory measurement it is mandatory that cell phones or other devices with annunciators or other disturbing audio capabilities be turned off before entering the classroom or laboratory. Calculators may be used during exams, but personal digital assistants or other devices with communications capabilities are not permitted.

 

Electronic Communication. Questions on the course material, schedule, or policies may be e-mailed to the instructors at the above-listed addresses. E-mailed questions will be addressed as soon as possible, although given the volume of e-mail received by the instructors a delay of up to several days may occur. All course-related e-mails should include the course number in the subject line.  Voice mailed questions will be handled similarly but with e-mailed responses.

 

Disability. Students who qualify for accommodations because of a disability should submit to the instructors a letter from CU Disability Services in a timely manner so that needs can be addressed.  Disability Services determines accommodations based on documented disabilities.  Contact: 303-492-8671, Willard 322, or http://www.colorado.edu/disabilityservices .
 
Religious Observances. Campus policy regarding religious observances requires that faculty make every effort to reasonably and fairly accommodate all students who, because of religious obligations, have conflicts with scheduled exams, assignments or required attendance. Conflicts between scheduled course activities and religious observances should be made known in writing to the instructors at least two weeks in advance of the activity so that alternate arrangements can be made. See full details at http://www.colorado.edu/policies/fac_relig.html .
 
Discrimination and Harassment. The University of Colorado at Boulder policy on Discrimination and Harassment (http://www.colorado.edu/policies/discrimination.html), the University of Colorado policy on Sexual Harassment, and the University of Colorado policy on Amorous Relationships applies to all students, staff and faculty.  Any student, staff or faculty member who believes s/he has been the subject of discrimination or harassment based upon race, color, national origin, sex, age, disability, religion, sexual orientation, or veteran status should contact the Office of Discrimination and Harassment (ODH) at 303-492-2127 or the Office of Judicial Affairs at 303-492-5550.  Information about the ODH and the campus resources available to assist individuals regarding discrimination or harassment can be obtained at http://www.colorado.edu/odh .