Physics 120  Circuits and Electronics
(Tell me and I forget. Teach me and I remember. Involve me and I learn.*)
Overview
The is a combined lecture and laboratory course. The lectures cover general principles in network theory, including conservation laws, feedback and linear systems analysis, and multistability, with a focus on applications to electronic circuits. They also include an introduction to the physics of semiconductor devices. The laboratories provide a means to learn practical aspects of circuit design, realization, and debugging.
The lectures take place in room 2622 York Hall, 8:00 to 9:20 AM on Tuesday and Thursday with noted exceptions. The Tuesday lecture is primarily devoted to a review of the upcoming laboratory excercise, while the Thursday lecture is primarily devoted to foundational material. There are twentytwo laboratory stations, split between adjacent rooms 3544 and 3574 Mayer Hall. There are two laboratory sessions, one on Tuesdays that runs from 3:30 to 7:20 PM and the other on Wednesdays, that runs from 3:00 to 6:50 PM. In addition, there is an open session from 3:30 to 7:30 PM on Thursdays.
Homework problems will be assigned on Monday and the solutions are due by midnight the following Sunday. They should be emailed as a single PDF through TritonEd (http://ted.ucsd.edu); there is a scanner in the laboratory. The grade for homework will be based on the number of problems seriously attempted.
Students work in pairs in the laboratory. The laboratory report, submitted separately by each partner, should be selfcontained, clearly written, and succinct. Include scanned, handdrawn circuit diagram as well as handdrawn plots, oscilloscope screen dumps, and Excel and/or Matlab plots. Present the circuit(s), your measurements, your analysis, and your conclusions. Contrast your results with theoretical expectations, as appropriate. The report is due by midnight of the following Sunday and should be emailed as a single PDF through TritonEd. Please remember to put your name, the laboratory section, your partner's name, your laboratory bench number, and the submission date on your report.
The course grade is based on laboratory work and reports (~60 %), homework (~10 %), midterm exam (~10 %) that is derived from homework, and a practical final exam (~20 %) that is derived from the laboratory exercises.
The majority of readings and some homework problems are from the textbook, Foundations of Analog and Digital Electronic Circuits (Morgan Kaufmann Series in Computer Architecture and Design) by Anant Agarwal and Jeffrey H. Lang, ISBN 1558607358 (8.5 Mb PDF). Handouts on the laborary exercises and auxillary material is posted below. Addtional textbooks are available in the laboratory. Lecture notes, which are meant solely as a guide to the topics covered as well as to delineate tedious algebraic manipulations, are posted prior to the lecture.
For Spring 2018 we are pleased to have Mr. Victor Gunawan, Mr. Xiang Ji, Ms. Hannah Liechty, Mr. Alexander Newberry, Mr. Anwesan Pal, and Ms. Pan Xia as teaching assistants. Mr. Newberry will further prepare the HW solutionsa and run review sections in 5623 Mayer Hall every Wednesday from 7:00 to 8:00 PM and every Friday from 2:00 to 3:00 PM.
Running schedule for Spring 2018
Week 1 (2 April)  
Laboratory: Instruments and DC circuits  
Exercise 1  (1.1 Mb PDF) 
Guide to the digital oscilloscope  (0.2 Mb PDF) 
Semilog (2 cycle) graph paper  (0.1 Mb PDF) 
Tu 3 Aprli, Lecture: Kirchhoff's laws, resistive circuits, Thevenin equivalents  
Th 5 April, Lecture: Transient response of capacitor and inductor circuits  
Thevenin equivalent example  (0.1 Mb PDF) 
Timedomain analysis handout  (0.1 Mb PDF) 
Convolution integral in pictures  (0.5 Mb PDF) 
Reading: Chapter 2, pp. 5389  
Homework: Exercises 2.5, 2.8; Problems 2.7, 2.10, 2.12, 2.15.  
Homework solutions  (6.2 Mb PDF) 
Week 2 (9 April)  
Laboratory: Capacitor circuits  
Exercise 2  (0.8 Mb PDF) 
Loglog (3 cycle) graph paper  (0.1 Mb PDF) 
Semilog (3 cycle) graph paper  (0.1 Mb PDF) 
Tu 10 April, Lecture: Impedance and steadystate response of reactive circuits  
Frequencydomain analysis handout  (0.1 Mb PDF) 
Th 12 April, Lecture: Laplace transform method for circuit analysis  
Laplace transform handout handout  (0.7 Mb PDF) 
Reading: Chapter 10, pp. 503525 and 550553; Chapter 13, pp. 732740 with j = i = sqrt(1)  
Homework: Exercises 10.4, 10.6, 10.7 & 10.14 (tricky!) .  
Homework solutions  (2.5 Mb PDF) 
Week 3 (16 April)  
Laboratory: Harmonic analysis and diode circuits  
Exercise 3  (0.4 Mb PDF) 
RLC handout  (0.2 Mb PDF) 
Tu 17 April, Lecture: Diode physics, rectification, load lines  
Fourier series handout  (0.1 Mb PDF) 
Th 19 April, Lecture: Fourier Series  
Diode fundamentals handout  (0.3 Mb PDF) 
Diode loadline analysis  (0.6 Mb PDF) 
Reading: Chapter 16, pp. 905911 (Chapter 4, pp. 203209 is optional)  
Homework: Exercises 4.4 & 4.7; Problems 2.11, 4.4 & 4.8; Find the Fourier series for a triangle wave of amplitude 1 and frequency f_o.  
Homework solutions  (1.2 Mb PDF) 
Week 4 (23 April)  
Laboratory: Operational amplifiers: Basics  
Exercise 4  (1.8 Mb PDF) 
Tu 24 April, Lecture: Operational Amplifier Basics (Mr. Anwesan Pal)  
Opamp handout  (0.3 Mb PDF) 
Th 26 April, Lecture: Generalized notion of negative feedback  
Feedback handout  (0.6 Mb PDF) 
Reading: Chapter 15, pp. 837859 (skip section 15.4.4 on pp. 855857)  
Homework: Problems on attached PDF.  (1.0 Mb PDF) 
Homework solutions  (6.0 Mb PDF) 
Week 5 (30 April)  
Laboratory: Operational amplifiers: Advanced  
Exercise 5  (1.8 Mb PDF) 
Frequency sweep: 1 Hz to 20 kHz over 1600 s.  
Tu 1 May, Lecture: Special operational amplifier circuits  
Op amp differentiator handout  (0.8 Mb PDF) 
Th 3 May, Lecture: Noise, S/N, and voltage scales  
Noise and signaltonoise handout  (0.4 Mb PDF) 
Reading: Chapter 15, pp. 855857 and 859866  
Homework: Problems in handout on "OpAmp Differentiator" and on attached PDF.  (0.2 Mb PDF) 
Homework solutions  (3.8 Mb PDF) 
Week 6 (7 May)  
Laboratory: Field effect transistors in the Ohmic region  
Exercise 6  (1.9 Mb PDF) 
Tu 8 May, Lecture: Field effect transistors: Basic physics plus operation in the "Ohmic" region  
MOSFET "followalong" diagrams for lecture  (1.5 Mb PDF) 
MOSFET physics tutorial (adapted from T. H. Lee)  (0.3 Mb PDF) 
FET Ohmic region handout  (0.5 Mb PDF) 
Th 10 May, Midterm exam  (0.1 Mb PDF) 
Midterm exam solutions  (1.9 Mb PDF) 
Reading: Chapter 7, pp. 335343, 386387, and 285286. Note that V_{T}=V_{GS}(off) and k = 2 

Homework: Exercises 7.3 & 7.4 and on attached PDF  (0.3 Mb PDF) 
Homework solutions  (1.9 Mb PDF) 
Week 7 (14 May)  
Laboratory: Field effect transistors: Active region  
Exercise 7  (1.0 Mb PDF) 
Tu 15 May, Lecture: Field effect transistors in the active region  
FET Active region handout  (0.9 Mb PDF) 
MOSFET and CMOS switch handout  (0.6 Mb PDF) 
Th 17 May, No lecture  
Reading: Chapter 7, pp. 344349 and 358363; note V_{T}=V_{GS}(off) and k = 2 

Homework: Problems on attached PDF  (0.7 Mb PDF) 
Homework solutions  (Z.Z Mb PDF) 
Week 8 (21 May)  
Laboratory: Bipolar junction transistors  
Exercise 8  (0.7 Mb PDF) 
Tu 22 May, Lecture: Bipolar junction transistor basics and active zone circuits  
Basics of NPN transistors and Active Zone circuits  (2.7 Mb PDF) 
Th 24 May, Lecture: Bipolar junction transistor amplifiers  
BJT common emitter amplifier design  (0.8 Mb PDF) 
Reading: Chapter 7, pp. 370381  
Homework: Problems on attached PDF  (0.1 Mb PDF) 
Homework solutions  (Z.Z Mb PDF) 
Week 9 (28 May)  
Laboratory: Positive and negative Feedback  
Exercise 9  (0.9 Mb PDF) 
Laboratory 9 Rubric  (0.1 Mb PDF) 
Tu 29 May, Lecture: Oscillators / Positive feedback circuit  
Positive feedback: Jimmy Hendrix playing into speaker during "Wild Thing" (starting near 4'50")  
Relaxation oscillator handout  (2.7 Mb PDF) 
Schmidttrigger handout  (0.7 Mb PDF) 
Th 31 May, Lecture: Boolean logic  
Boolean basics  (0.2 Mb PDF) 
Transistor logic  (0.1 Mb PDF) 
Reading: Chapter 15, pp. 866872  
Homework: Exercise ; Problems .  
Homework solutions  (Z.Z Mb PDF) 
Week 10 (4 June)  
Laboratory: Digital circuits  
Exercise 10  (1.7 Mb PDF) 
State transition chart  (0.1 Mb PDF) 
Laboratory 10 Rubric  (0.1 Mb PDF) 
Tu 5 June, Lecture : Bistability and flip flop families  
Th 7 June, "Cultural" Lecture: Digital (electrons & interface potentials) versus neuronal (ions & entropic potentials) computing  
Reading: Chapter 5, pp. 256267  
Homework: Exercise ; Problems .  
Homework solutions  (Z.Z Mb PDF) 
Final Exam (1 hour practical exam on 14 June)  (0.2 Mb PDF) 
Data Sheets
Reading capaciter values  (0.3 Mb PDF) 
Reading resister values  (0.1 Mb PDF) 
Guide to decibels. Notes of Han Lin  (0.1 Mb PDF) 
1N914 diode  (0.3 Mb PDF) 
C503B light emitting diode  (1.0 Mb PDF) 
2N3906 PNP BJT  (0.2 Mb PDF) 
2N3904 NPN BJT  (0.2 Mb PDF) 
2N4401 medium power NPN BJT  (0.5 Mb PDF) 
BPV11 NPN phototransistor  (0.1 Mb PDF) 
2N5485 Nchannel JFET  (0.3 Mb PDF) 
2N7000 Nchannel MOSFET  (0.1 Mb PDF) 
IRL510 power Nchannel MOSFET  (1.1 Mb PDF) 
LF411 FET operational amplifier  (0.5 Mb PDF) 
LM358 dual FET operational amplifier  (1.9 Mb PDF) 
LM741 operational amplifier  (0.4 Mb PDF) 
LF311 comparator  (0.5 Mb PDF) 
LM311 comparator  (1.7 Mb PDF) 
DG400B dual CMOS analog switch  (0.2 Mb PDF) 
DG403 quad CMOS analog switch  (0.3 Mb PDF) 
7555 digital timer  (0.3 Mb PDF) 
74HC00 quad CMOS NAND gate  (0.3 Mb PDF) 
74HC74 dual CMOS D flipflop  (0.2 Mb PDF) 
74HC175 quadCMOS D flipflop  (0.3 Mb PDF) 
Electret microphone  (0.3 Mb PDF) 
Ordering Information
Components  (0.1 Mb PDF) 
Equipment Manuals
BK Precision 2831E bench voltmeter  (1.2 Mb PDF) 
GW Instek GPS 4303 quadriple power supply  (2.7 Mb PDF) 
Tektronix DPO2014B four channel 100 MHz oscilloscope (w/FFT)  (6.9 Mb PDF) 
Tektronix AFG2021 arbitrary function generator  (3.4 Mb PDF) 
Tektronix AFG1022 arbitrary function generator  (5.3 Mb PDF) 
Auxillary materials
Circuits; from Horowitz & Hill 2nd  (3.7 Mb PDF) 
RC circuit; notes of DK  (2.1 Mb PDF) 
RL circuit; notes of DK  (2.1 Mb PDF) 
LC circuit; notes of DK  (2.1 Mb PDF) 
Bode plots; notes of Harrison Wang  (4.5 Mb PDF) 
Fourier transforms; from Frederick & Carlson  (0.5 Mb PDF) 
Fourier series of full wave rectified sine wave; notes of DK  (2.0 Mb PDF) 
Complex integrals; from Matthews & Walker  (0.1 Mb PDF) 
Power; from Horowitz & Hill 2nd  (0.1 Mb PDF) 
Diodes; from Horowitz & Hill 2nd  (0.5 Mb PDF) 
Semiconductors; from The Feynman Lectures  (1.8 Mb PDF) 
Operational amplifiers; from Horowitz & Hill 2nd  (0.6 Mb PDF) 
Multistage filters; notes of DK  (1.1 Mb PDF) 
Transistors; from Horowitz & Hill 2nd  (1.1 Mb PDF) 
Field effect transistors; from Horowitz & Hill 2nd  (1.4 Mb PDF) 
Comparators & Schmidt triggers; from Horowitz & Hill 2nd  (0.2 Mb PDF) 
Timers; from Horowitz & Hill 2nd  (0.5 Mb PDF) 
FET switches; from Horowitz & Hill 2nd  (0.9 Mb PDF) 
Boolean identities  (0.1 Mb PDF) 