ECEN 3250, Microelectronics, Spring 2018


Weekly Updates, 1/10/2018:


-        Welcome to ECEN3250! The course syllabus can be found here.

-        All other documents, including lecture notes and homeworks, will be available at the course website on Canvas. To access Canvas, go to: Log in using your CU login name and IdentiKey password. Once you log-in, click on ECEN 3250-001: Microelectronics to go into our course.

o   Homework will be posted on Fridays, and are due at the beginning of class on the following Friday (except for exam weeks).

o   Lecture notes will be posted in advance of each lecture.


Course Information:

Instructor: Prof. Taylor Barton (ECOT-253)

Lectures: MWF 11:00 AM 11:50 AM, ECCR 150

Office hours: Tuesdays 11:30-12:30, and Thursdays 3:30-4:30, in ECOT 253


Important dates to remember:


Midterm I: February 28, in class

Midterm II: April 4, in class

Final: Tuesday May 8, details TBD


General Class Information:


Course Goals:

Understand how to approach analysis and design of circuits with nonlinear elements, including diodes, BJTs and MOSFETs, with an emphasis on design oriented analysis techniques.

Understand the principles of operation for pn junctions, semiconductor diodes, MOSFETs and BJTs, including intuition behind the physical meaning of device model parameters and limitations of models.

Understand how to analyze and design basic amplifier gain stages, operational amplifiers, and digital logic gates using MOSFETs and BJTs.



ECEN 2260, Circuits as Systems


Required textbook:

Microelectronic Circuits, 7th edition (2015), Sedra and Smith, Oxford University Press




Grading (preliminary)






Midterm I


Midterm II


Final Exam



The lowest quiz grade and lowest homework grade will be automatically dropped.

For more details and course and instructor policies, see the syllabus.



Tentative Schedule

Dates are tentative and are subject to change. Please check regularly.




Jan 15 

Martin Luther King Day

Jan 17 

Course introduction & overview


Jan 19

The ideal diode & example circuits (Sect. 4.1)

HW0 out

Jan 22

Terminal characteristics of diodes (Sect. 4.2)

Jan 24

Diode models and analysis techniques (Sect. 4.3)

Jan 26

Small signal modeling (Sect. 4.3)

HW0 due, HW1 out

Jan 29

Reverse breakdown & Zener diodes (Sect. 4.4)

Jan 31

Rectifiers (Sect. 4.5)

Quiz 0

Feb 2

Rectifiers (Sect. 4.5)

HW1 due, HW2 out

Feb 5

Physical operation of diodes (Ch 3)

Feb 7

Physical operation of diodes (Ch 3)

Quiz 1

Feb 9

Limiting and clamping circuits (Sect. 4.6)

HW2 due, HW3 out

Feb 12

Physical operation of diodes (Ch 3)

Feb 14

MOS Field Effect Transistor (Sect. 5.1)

Quiz 2

Feb 16

NMOS operating regions, DC solutions (Sect. 5.2-5.3)

HW3 due, HW4 out

Feb 19

NMOS DC solutions (Sect. 5.2-5.3)

Feb 21

PMOS devices, operating regions, DC solutions (Sect. 5.2-5.3)

Quiz 3

Feb 23

CMOS DC solutions, NMOS amplifier, large signal analysis (Sect. 5.3 & 7.1)

HW 4 due, HW 5 out

Feb 26

Review for Midterm I


Feb 28

Midterm I

March 2

CS amplifier, small signal analysis (Sect. 7.2.1)

March 5

Continue small signal analysis (Sect. 7.2.1)


March 7

Basic gain stages, CS, CD, CG (Sect. 7.3-7.5, only material on MOSFETS)


March 9

Biasing schemes (Sect. 7.4.1), current mirrors & current sources (Sect. 8.2.1-8.2.2)

HW5 due, HW6 out

March 12

Body effect (Sect. 5.4), Active load (Sect. 8.3)


March 14

Basic gain stages and biasing examples (Sect. 7.3-7.5, only material on MOSFETS)

Quiz 4

March 16

Two-stage amplifier, cascade amplifier (Sect. 8.5)

HW6 due, HW7 out

March 19

Frequency response, CS amplifier (Sect. 10.2-10.3, only material on MOSFETS)

March 21

Continue frequency response (Sect. 10.4)

Quiz 5

March 23

Continue frequency response (Sect. 10.5-10.6, only material on MOSFETS)

HW7 due, HW8 out

March 26

Spring Break

March 28

Spring Break

March 30

Spring Break


April 2

Review for Midterm II


April 4

Midterm II


April 6

BJT operating regions and characteristics (Sect. 6.1-6.2)

HW8 due, HW9 out

April 9

BJT DC solutions (Sect. 6.3), BJT amplifier, large signal analysis (Sect. 7.1)

April 11

BJT amplifier, small signal modeling (Sect. 7.2.2)

April 13

BJT amplifier, small signal modeling (Sect. 7.2.2)

HW9 due, HW10 out

April 16

BJT CE amplifier with biasing, BJT emitter follower, BJT and MOS comparison (Sect. 7.3-7.4)

April 18

BJT and BiCMOS transistor pairings, BJT and MOS comparison (Appendix G [on website], Sect. 8.2.3, 8.7)

Quiz 6

April 20

Differential pair (Sect. 9.1)

HW10 due, HW11 out

April 23

Operational amplifiers intro and review (Sect. 2.1-2.4, 2.6-2.7)


April 25

Op amp design (Sect. 13.1-13.2)

Quiz 7

April 27

Op amp design, LM741 (Sect. 13.3-13.4)

HW11 due

April 30

CMOS and BJT logic gates (Sect. 14.1 - 14.4)


May 2

Continue CMOS and BJT logic gates (Sect. 14.1 - 14.4) , Transistor sizing (Sect. 14.5)

Quiz 8



Final:Tuesday. May 8, 7:30 10:00 pm, TBA