ECEG 350
Electronics I

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HW #9 Solutions (12/12/2024)

The solutions to the graded and ungraded problems in HW #9 are now available at the course Moodle site.

Old ECEG 350 Final Exam (12/11/2024)

A copy of the ECEG 350 final exam with solutions from Fall 2020 is now available at the course Moodle site in the section labeled "Exams From Past Offerings of ECEG 350."

Note that the topic coverage on exams from previous years could differ from that of this year's exams. If you encounter a problem that seems to involve skills or knowledge that we have not covered this semester or that we covered earlier, that is the likely reason.

Ungraded HW #10 (BJT Problems) (12/11/2024)

HW #10, which consists of BJT analysis problems for practice, is now available. It will not be graded. The solutions are available at the course Moodle site.

You will be expected to be familiar with the concepts highlighted in the practice problems when you take the final exam.

Help Sessions for Dec. 9–13 (12/11/2024)

I plan to be available at least at the following times this week:

• Wednesday 3:30–5:00 pm (BRKI 368)
• Thursday 3:30–5:00 pm (BRKI 368)
• Thursday 9:30–10:15 pm (Zoom)

An additional help session or two will be scheduled for Monday, December 16 (the day before the final exam).

Guidelines and additional information:

• Please contact me if you have a conflict with these times and would like to schedule a meeting at a different time.
• The Zoom link is available at the course Moodle site.
• If I am helping another student when you drop by, you may usually join in the conversation.
• If I have been helping you for a relatively long time, I might pause our conversation to help other students who are waiting for assistance.
• For in-person sessions, if I have finished helping you, please move out to the hall or somewhere else so that the chairs in my office are clear for newly arriving students.
• As a courtesy during Zoom sessions, please use your camera.

Review Session for Final Exam (12/9/2024)

To help you prepare for the final exam, an optional review session will be offered at 9:30 pm on Sunday, December 15 in Breakiron 264 (our usual classroom). The room has been confirmed.

As with the previous review sessions, I will answer questions and work through example problems by request. I strongly suggest that you come prepared with questions to ask.

If you cannot attend the review session and would like to meet with me at another time, please contact me or visit during one of the upcoming help sessions.

Review Sheet for Final Exam (12/9/2024)

The review sheet for the final exam is now available on the Exams page at the course web site. It includes important administrative information and a rough breakdown of the topic coverage on the exam.

Help Sessions for Dec. 8 & 9 (12/8/2024)

I plan to be available at least at the following times today (Sunday) and Monday:

• Sunday 9:00–10:00 pm (Zoom)
• Monday 5:30–6:30 pm (BRKI 368)
• Monday 9:00–10:00 pm (Zoom)

I am also usually available right after class.

Additional help sessions will be scheduled for Wednesday and Thursday this week and next Sunday (Dec. 15) and Monday (Dec. 16).

Guidelines and additional information:

• Please contact me if you have a conflict with these times and would like to schedule a meeting at a different time.
• The Zoom link is available at the course Moodle site.
• If I am helping another student when you drop by, you may usually join in the conversation.
• If I have been helping you for a relatively long time, I might pause our conversation to help other students who are waiting for assistance.
• For in-person sessions, if I have finished helping you, please move out to the hall or somewhere else so that the chairs in my office are clear for newly arriving students.
• As a courtesy during Zoom sessions, please use your camera.

Reading Assignment for Dec. 9–13 (12/6/2024)

• M: Section 6.3
• W: [Reading Day]
• F: [Exam Week]

In Section 6.3, focus on the examples that involve npn-type BJTs.

Selected Answers to HW #9 (12/6/2024)

Answers to selected graded problems in HW #9 are now available on the Homework Assignments page.

Process Technology Table and BJT Scale Current Formula (12/6/2024)

The comparison of MOSFET process technologies that was shown in lab on December 3 is now available at the course Moodle site in the "Additional Resources" section.

Also available there is an explanation of the formula for the scale (saturation) current parameter I_S that is relevant to pn-junction diodes and BJTs.

Information on MOSFET Body Effect (12/6/2024)

If the substrate (body) of a MOSFET is not connected to the source terminal, then the pn-junction surrounding the source region can become reverse biased, which in turn causes the threshold voltage V_tto change slightly. A good explanation of this phenomenon, known as the body effect, can be found in Subsection 5.4.3 of the textbook. It's a short read.

An explanation of the impact of the body effect on the hybrid-pi model used in the small-signal analysis of MOSFET-based amplifiers can be found at the end of Subsection 7.2.1.

Exam #3 Solutions (12/4/2024)

The solutions to Exam #3 are now available at the course Moodle site.

Exam #3 Results (12/4/2024)

The average score for Exam #3 was 85.4. The average score breakdowns for the individual problems (converted to percentages) were:

• Prob. 1 - 92%
• Prob. 2 - 90%
• Prob. 3 - 81%
• Prob. 4 - 90%
• Prob. 5 - 74%

HW #9 - UPDATE (12/3/2024)

The assignment for HW #9 is now available, but the deadline has been changed. It is now due via Moodle at 11:59 pm on Monday, December 9.

Lab #5 Assignment (12/3/2024)

The assignment for Lab #5 is now available on the Laboratory page.

Help Sessions for Dec. 2–6 (12/2/2024)

I plan to be available at least at the following times this week:

• Tuesday 8:00–9:00 pm (Zoom)
• Wednesday 4:00–5:00 pm (BRKI 368)
• Thursday 5:00–6:00 pm (BRKI 368)
• Thursday 9:00–10:00 pm (Zoom)
• Friday 4:00–5:00 pm (BRKI 368)

I am also usually available right after class.

Guidelines and additional information:

• Please contact me if you have a conflict with these times and would like to schedule a meeting at a different time.
• The Zoom link is available at the course Moodle site.
• If I am helping another student when you drop by, you may usually join in the conversation.
• If I have been helping you for a relatively long time, I might pause our conversation to help other students who are waiting for assistance.
• For in-person sessions, if I have finished helping you, please move out to the hall or somewhere else so that the chairs in my office are clear for newly arriving students.
• As a courtesy during Zoom sessions, please use your camera.

Reading Assignments for Dec. 2–6 (12/1/2024)

• M: Sections 16.2.2 and 16.3
• W: Sections 6.0, 6.1, and 6.2
• F: Section 6.3

Section 6.0 is the introduction to Chapter 6. In Section 6.1, focus on the three regions of operation of the bipolar junction transistor (BJT).

The Wednesday, Friday, and next Monday (Dec. 9) lectures will comprise a brief introduction to BJTs. These devices are likely to be covered in much more detail next semester in ECEG 351.