## Page Contents

This is the web page for ECE 3050 Analog Electronics, taught by Dr. W. Marshall Leach, Jr.

## Supplementary Material

The TL071 Operational Amplifier Circuit Diagram.

How to use Mason's Flow Graph Formula

How to use superposition with dependent sources

ECE 3040 Class Notes. Many of these notes cover the ECE 3050 material. You may find some of them easier to follow.

Log-log graph paper for Bode plots.

Paper on superposition with controlled sources.

## Summer 2010

Course Syllabus

The GTA for the class is Roger Liang. His hours in the ECE help lab are 9:00 a.m. to noon on Tuesdays and Thursdays.

### Quiz Solutions

Quiz 1 (Ave = 32/40), Quiz 2 (Ave = 30/40), Quiz 3 (Ave = 30/40), Quiz 4 (Ave = 32/40), Quiz 5 (Ave = 30/40), Quiz 6 (Ave = 35/40), Quiz 7 (Ave = 26/40), Quiz 8 (Ave = 31/40), Quiz 9 (Ave = 33/40), Quiz 10

### Homework Problems

Set 01 - Problems involving writing circuit equations and using superposition.
Set 02 - Diode small-signal model problems. Zener diode problems. Introductory BJT concept problems.
Set 03 - BJT bias problems.
Set 04 - Introductory FET concept problems.
Set 05 - FET bias problems.
Set 06 - BJT small-signal analysis problems.
Set 07 - BJT single-stage amplifier problems.
Set 08 - BJT multi-stage amplifier problems.
Set 09 - BJT differential amplifier problems.
Set 10 - FET small-signal analysis problems.
Set 11 - MOSFET multi-stage amplifier problems.
Set 12 - MOSFET differential amplifier problems.
Set 13 - BJT current-mirror problems.
Set 14 - MOSFET current-mirror problems.
Set 15 - Current source problems.
Set 16 - VBE multiplier and complimentary common collector amplifier problems.
Set 17 - Ideal op-amp problems.
Set 18 - Transfer function and Bode plot problems.
Set 19 - Oscillator problems.

### Class Notes

Circuit Analysis
Superposition with Controlled Sources
The PN Junction Diode
Junction Diode - Basic Operation, i-v Characteristics, Linear Model, Small-Signal Model
The Bipolar Junction Transistor (BJT)
The BJT - Device Equations, Transfer Characteristics, Output Characteristics, Hybrid-Pi Model, T Model, Collector Equivalent Circuit, Emitter Equivalent Circuit, Base Equivalent Circuit, CE/CC Amplifier Example, Cascode Amplifier Example, Differential Amplifier Example, Small-Signal High-Frequency Models
BJT Bias Equation - Basic Bias Equation with Examples
The Common-Emitter (CE) Amplifier - Basic Circuit, DC Solution, Small-Signal Solution, Example
The Common-Collector (CC) Amplifier - Basic Circuit, DC Solution, Small-Signal Solution, Example
Clipping Levels of Single-Stage Amplifiers - The CE Amplifier, The CC Amplifier, Examples
The Common-Base Amplifier - Basic Circuit, DC Solution, Small-Signal Solution, Example
The BJT Differential Amplifier - Basic Circuit, DC Solution, Small-Signal Solution, The Diff Amp With Non-Perfect Tail Supply, Differential and Common-Mode Gains, The Diff Amp with Active Current-Mirror Load, Examples
The BJT Current Mirror - Basic Current Mirror, Current Mirror With Base Current Compensation, The Wilson Current Mirror, The Low-Level Current Mirror, The Transconductance Amplifier, Examples
Field Effect Transistors
MOSFET - Device Symbols, Device Equations, Transfer and Output Characteristics, Small-Signal Models, The Body Effect, The Hybrid-Pi Model, The T Model, The Drain Equivalent Circuit, The Source Equivalent Circuit, Examples, High-Frequency Models
MOSFET Bias Equation - Basic Bias Equation, Examples
JFET - Device Equations, Bias Equation, Small-Signal Models, Hybrid-Pi Model, T model, Drain Equivalent Circuit, Source Equivalent Circuit, Examples, High-Frequency Models
Common-Source Amplifier - Basic Circuit, DC Bias Equation, Small-Signal Analysis, Examples
Common-Source Amplifier Example - Mathcad 7 Example
Common-Gate Amplifier - Basic Circuit, DC Bias Equation, Small-Signal Analysis, Examples
Common-Gate Amplifier Example - Mathcad 7 Example
Common-Drain Amplifier, Common-Drain Amplifier Example - Basic Circuit, DC Bias Equation, Small-Signal Analysis, Examples
MOSFET Differential Amplifier - Basic Circuit, DC Bias Analysis, Small-Signal Analysis, Common-Mode Rejection Ratio, The Diff-Amp with Current Mirror Load, Examples
MOSFET Differential Amplifier Example - Mathcad 7 Example
MOSFET Current Mirror Circuits - Common-Source Amplifier with Current Mirror Load, Common-Gate Amplifier with Current Mirror Load, Common-Drain Amplifier with Current Mirror Load, Differential Amplifier with Current Mirror Load
Analog Building Blocks
Single Transistor Current Sources
Complementary Common-Collector Amplifier
Operational Amplifier Circuits
TL071 Op Amp
Ideal Operational Amplifier (Op Amp) Circuits
Frequency Response of Circuits
Transfer Functions and Bode Plots
Useful RC Impedance Theorems
Frequency Response of Non-Ideal Op Amps
Wien-Bridge and Phase-Shift Oscillators
Frequency Response of Common-Emitter Amplifier
Numerical Example of Common-Emitter Amplifier Frequency Response
Feedback Amplifiers
Negative Feedback Amplifiers
Collection of Solved Negative Feedback Amplifier Problems
Active Filters
Active Filter Potpourri

More course notes for other semesters are linked below.

### Useful Diagrams of Some Circuits Analyzed in Class

02. BJT Differential Amplifier with a Current Source Tail Supply
03. BJT Differential Amplifier with a Resistive Tail Supply
04. MOSFET Differential Amplifier with a Current Source Tail Supply
05. MOSFET Differential Amplifier with a Resistive Tail Supply
06. BJT Differential Amplifier with a Resistive Tail Supply. Differential and Common-Mode Analyses
07. BJT Current Mirror, BJT Current Mirror with Base Current Compensation, Wilson BJT Current Mirror, Low-Level BJT Current Mirror, BJT Differential Amplifier with Current-Mirror Load, MOSFET Differential Amplifier with Current-Mirror Load
08. Transconductance Op Amp, Circuit Symbol, AM Modulator Example Application
09. JFET Current Source, BJT Current Source, VBE Multiplier, Complementary Common-Collector Stage
10. BJT Operational Amplifier (Op Amp) Connected as a Non-Inverting Amplifier, Equivalent Circuit Using the Operational Amplifier (Op Amp) Symbol
11. Op amp symbol and its controlled source model. Op amp with positive and negative feedback. Inverting amplifier and its controlled-source model.
12. Inverting amplifier with a T feedback network. Current to voltage converter. Non-inverting amplifier and its controlled source model.
13. Voltage follower. Inverting summer. Negative impedance converter.
14. Non-inverting summer. One op-amp diff amp. Diff amp with a floating source.
15. Switch hitter. Two op-amp diff amp. Instrumentation amplifier.
16. Basic op amp model. Equivalent circuit of model. Circuit for calculating Io1.

## Summer 2005

### Design Project

Click here for a description of the design project for this semester. It is due in class on the last day of the semester.

## Spring 2004

### Other Documents

BJT Amplifier Small-Signal Equivalent Circuits. A summary analysis of the CE, CB, and Common-Collector single-stage BJT circuits, illustrating application of the models on the BJT Summary Formula Sheet.
An Operational Amplifier (Op Amp) Tutorial - Derives the formulas for the gain-bandwidth product and the slew rate. Includes several examples.

## Summer 2003

Chapter 1 - Sections 1.3 and 1.4
Chapter 3 - Sections 3.2 through 3.6
Chapter 5 - Sections 5.5, 5.6, 5.9, and 5.12
Chapter 13 - Sections 13.4 and 13.5
Chapter 4 - Sections 4.5, 4.6, and 4.10
Chapter 13 - Sections 13.7 and 13.8
Chapter 5 - Section 5.13, Chapter 4 - Section 4.11

### Class Notes

A Common-Emitter - Common-Collector Amplifier Example
Approximate Analysis of Multi-Stage Amplifiers
Ideal Operational Amplifier (Op Amp) Circuits - These notes come from my ECE4435 class. In ECE3050, we are covering many of the circuits covered here. You will also find other op amp circuits covered in the class notes for spring 2003 semester. These notes were not written to be posted on the class web page, but you can poke around in them and find all the circuits we are covering with some examples that haven't been covered in class.

## Spring 2003

### Other Documents

Chebyshev Transfer Functions

## Spring 2002

### Multi-Stage BJT Amplifier Examples

Differential Amplifier Example - A Mathcad example.

### Other Documents

Frequency Response of the Common-Emitter Amplifier - A MathCad example.
The BJT - This is a comprehensive treatment of the BJT based on the Gummel-Poon model for the active mode. It is more complicated than the treatment given in class. If you are interested in a more advanced treatment, this is it. Basic device equations. Current Gains. Small-signal models - hybrid-p and T models. Small-signal equivalent circuits - emitter equivalent circuit, Norton collector circuit, Thévenin emitter circuit, Thévenin base circuit. Summary of models. Example amplifier circuits - common emitter, common collector, common base, CE/CC, diff amp. Small-signal high-frequency models - hybrid-p and T models.

## Spring 2001

Cascode Amplifier Example - A MathCad example.
FET Device Equations and Small-Signal Models - Covers the basic equations for the fet currents. Derives the transfer characteristics and output characteristics. Develops the hybrid-p and T models from the equations. Develops the source equivalent circuit, the Norton circuit seen looking into the drain and the Thévenin circuit seen looking into the source. Both the JFET and MOSFET are covered.
Common-Source Amplifier Example - A MathCad example.
Common-Gate Amplifier Example - A MathCad example.
Common-Drain Amplifier Example - A MathCad example.
Some Practice Problems.

## Summer 2000

### Evaluation Version of AIM Spice

Here is a free version of SPICE that you might like better than PSpice. The evaluation version lets you have 20 active devices (PSpice only allows 10) and 50 nodes in a circuit. The program makes better use of the graphics features of Windows. For example, you can copy plots to the clipboard as metafiles, whereas PSpice only lets you make bitmaps of plots (if you can figure out how to do it). With the graphics post processor, you can scale the plots with the mouse, control the labeling and gridlines, change the axis labels, etc., things that cannot be done with PSpice. What PSpice calls the OUT file, Aim Spice calls the LOG file. You can download the free evaluation version of AIM Spice here.