Page Contents

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

Cell Phones

Before coming into my office, please turn your cell phone off.

Notes

Old copies of this page or documents linked on this page may be in the cache of your web browser. If you are looking for additions and corrections or if you find a link that does not work, you may want to hit the refresh button on your browser to be sure you have loaded the latest copy.

To speed up the opening of Adobe PDF documents, load your Adobe Acrobat reader and minimize it. You will find that PDF documents load much faster.

Formula Summary Sheets

• BJT Formula Summary Sheet
• MOSFET and JFET Formula Summary Sheet

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.

Log-log graph paper for Bode plots.

Summer 2008

Course Syllabus

Powerpoint Figures

These figures are from the online notes for the course. They are posted for the Savannah students to see during any lecturea where the figures are not in the view of the camera.

Set 01 - Updated 05/23/08
Set 02

Graduate Teaching Assistant

The GTA for the class is Jasun Wung. His hours in the 4th floor Tutorial Laboratory are from 9:00 to 12:00 on Fridays.

Quizzes

Quiz 01, Distribution
Quiz 02, Distribution
Quiz 03, Distribution
Quiz 04, Distribution
Quiz 05, Distribution
Quiz 06, Distribution
Quiz 07 - Corrected, Distribution
Quiz 08, Distribution
Quiz 09
Quiz 10
Quiz 11

Homework Problems

Set 01
Set 02 Revised 6/2/08
Set 03
Set 04
Set 05
Set 06
Set 07

Class Notes

Superposition Examples
Junction Diode
The BJT
The BJT Bias Equation
The MOSFET
The MOSFET Bias Equation
The JFET
The Common-Emitter Amplifier
Common-Emitter Amplifier Example
The Common-Collector Amplifier
Common-Collector Amplifier Example
Clipping Levels of the Common-Emitter and Common-Collector Amplifiers
The Common-Base Amplifier
Common-Base Amplifier Example
The BJT Differential Amplifier
The BJT Current Mirror
The Common-Source Amplifier
Common-Source Amplifier Example
The Common-Gate Amplifier
Common-Gate Amplifier Example
The Common-Drain Amplifier
Common-Drain Amplifier Example
The MOSFET Differential Amplifier
MOSFET Differential Amplifier Example
MOSFET Current Mirror Circuits
Single Transistor Current Sources
Complementary Common-Collector Amplifier
TL071 Op Amp - This illustrates some of the building blocks of analog design that we have covered in class.
Ideal Operational Amplifier (Op Amp) Circuits
Transfer Functions and Bode Plots
Useful RC Impedance Theorems
Frequency Response of Non-Ideal Op Amps
The Wien Bridge Oscillator
Frequency Response of the Common-Emitter Amplifier
Numerical Example of the Common-Emitter Amplifier Frequency Response
Feedback Amplifiers
Collection of Solved Feedback Amplifier Problems
Active Filter Potpourri

Fall 2007

Quizzes

Quiz 01, Quiz 02, Quiz 03, Quiz 04, Quiz 05, Quiz 06, Quiz 07, Quiz 08, Quiz 09, Quiz 10, Quiz 11, Quiz 12, Quiz 13, Quiz 14

Summer 2007 Class Documents

Quizzes

Quiz 01, Quiz 02, Quiz 03, Quiz 04, Quiz 05, Quiz 06, Quiz 07, Quiz 08, Quiz 09, Quiz 10

Summer 2006 Documents

The class GTA is Gael Pirlot. His hours in the 4th floor tutorial lab are Wednesday mornings from 8:00 to 11:00.

Notes

The BJT Bias Equation
The FET Bias Equation
The Common-Emitter Amplifier
The Common-Base Amplifier
The Common-Collector Amplifier
The Common-Source Amplifier
The Common-Gate Amplifier
The Common-Drain Amplifier
The BJT Diff Amp
The MOSFET Diff Amp
The BJT Current Mirror
MOSFET Current Mirror Applications
Single Transistor Current Sources
Ideal Operational Amplifier (Op Amp) Circuits
Transfer Functions and Bode Plots
Active Filter Potpourri

Spring 2006 Documents

Class Notes

Set 01
Set 02
Set 03
Set 04
Set 05
Set 06 - BJT Simplified T Model, BJT Norton Collector Circuit, BJT Thévenin Base Circuit, BJT Thévenin Emitter Circuit, BJT Summary of Models
Set 07 - The Common-Emitter Amplifier, A Mathcad Example, A Second Example
Set 08 - The Common-Base Amplifier, A Mathcad Example
Set 09 - The Common-Collector Amplifier, A Mathcad Example, A Second Example
Set 10 - The BJT Differential Amplifier with Current Source Tail Supply, Approximate Analysis of the BJT Diff Amp. Differential and Common-Mode Analysis of the BJT Diff Amp., BJT Differential Amplifiers
Set 11 - MOSFET Pi Model with Body Effect, MOSFET T Model with Body Effect, MOSFET Simplified T Model with Body Effect, MOSFET Thevenin Source Circuit with Body Effect, MOSFET Summary with Body Effect
Set 12 - Single-Stage MOSFET Amplifiers with Body Effect.
Set 13 - Two-Stage MOSFET Common-Gate Amplifier with Body Effect.
Set 14 - MOSFET Differential Amplifier with Body Effect.
Set 15 - BJT Current Mirrors and the transconductance op amp, The MOSFET - This collection of notes covers the example IC MOSFET circuits covered in class plus some other topics on MOSFETS that have already been covered in class.
Go to Fall 2002 Notes below for additional class notes.
Set 14 - Ideal Operational Amplifier (Op Amp) Circuits.
Transfer Functions and Bode Plots - Covers the basics of making Bode magnitude and phase plots. There are not many example Bode plots presently in this document. The methods of writing transfer functions by inspection for RC voltage divider networks and impedance functions for RC networks are described and examples are given.
Dr. Leach's Filter Potpourri - More than you want to know about active filters. Includes material on making Bode plots and writing transfer functions by inspection for RC voltage divider networks and impedance functions for RC networks with examples.
Set 16 - Oscillators and non-linear circuits.
Feedback Amps

Summer 2005 Class Documents

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 Class Documents

Class Notes

• Set 06 - Single Stage BJT Amplifier Examples:
  • Common-Emitter Amplifier using r₀ approximations.
  • Common-Base Amplifier using r₀ approximations.
  • Common-Collector Amplifier Exact solution because R_tc = 0.
• Set 07 - The BJT Differential Amplifier with Current Source Tail Supply. Exact solution, i.e. no r₀ approximations. See Set 06 for Fall 2002 for more BJT diff amp examples.
• Set 08 - Approximate Analysis of the BJT Diff Amp. Differential and Common-Mode Analysis of the BJT Diff Amp.
• Set 09 - Single Stage BJT Amplifiers. Covers the exact solutions and the r₀ approximations to both NPN and PNP single-stage amplifiers.
• Set 10 - BJT Differential Amplifiers
• Set 11 -

  MOSFET Pi Model with Body Effect
  MOSFET T Model with Body Effect
  MOSFET Simplified T Model with Body Effect
  MOSFET Thevenin Source Circuit with Body Effect
  MOSFET Summary with Body Effect
  

• Set 12 - Single-Stage MOSFET Amplifiers with Body Effect.
• Set 13 - Two-Stage MOSFET Common-Gate Amplifier with Body Effect.
• Set 14 - MOSFET Differential Amplifier with Body Effect.
• Set 14 - Ideal Operational Amplifier (Op Amp) Circuits.
• Dr. Leach's Filter Potpourri - More than you want to know about active filters. Includes material on making Bode plots and writing transfer functions by inspection for RC voltage divider networks and impedance functions for RC networks with examples.
• Set 16 - Oscillators and non-linear circuits.
• Feedback Amps

Other Class Documents

The BJT - The active mode equations for the bjt currents. Development of the hybrid-p and T small-signal models. Development of the simplified T model, the Norton collector circuit, the Thévenin emitter circuit, and the Thévenin base circuit.
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.
BJT Current Mirrors - The basic mirror, the mirror with base current compensation, the Wilson mirror, the low-level mirror, the transconductance op amp, and an example am modulator.
The MOSFET - Basic device equations. Small-signal models - hybrid-p and T models. Small-signal equivalent circuits - simplified T model, Norton drain circuit, Thévenin source circuit. Summary of models. Example amplifier circuits - common source, common drain, common gate, differential amplifier. Small-signal high-frequency models - hybrid-p and T models.
The JFET - The JFET is very similar to the MOSFET. Replace K in the equations for the MOSFET with b and set c = 0, and you have the JFET equations. Basic device equations. Small-signal models - hybrid-p and T models. Small-signal equivalent circuits - simplified T model, Norton drain circuit, Thévenin source circuit. Summary of models. Example amplifier circuits - common source, common drain, common gate. Small-signal high-frequency models - hybrid-p and T models.
An Operational Amplifier (Op Amp) Tutorial - Derives the formulas for the gain-bandwidth product and the slew rate. Includes several examples.

Formula Summary Sheets

BJT Formula Summary Sheet
MOSFET and JFET Formula Summary Sheet

Summer 2003 Class Documents

Reading Assignments

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

• Set 06 -

  BJT Simplified T Model
  BJT Norton Collector Circuit
  BJT Thévenin Base Circuit
  BJT Thévenin Emitter Circuit
  BJT Summary of Models
  

• Set 07 - The Common-Emitter Amplifier, A Mathcad Example, A Second Example
  
• Set 08 - The Common-Base Amplifier, A Mathcad Example
• Set 09 - The Common-Collector Amplifier, A Mathcad Example, A Second Example
  
• Multi-Stage Amplifier Example

  A Common-Emitter - Common-Collector Amplifier Example
  

• Set 10 - Approximate Analysis of Multi-Stage Amplifiers
• Set 11 - The BJT Differential Amplifier with Current Source Tail Supply. See Set 06 for Fall 2002 for more BJT diff amp examples.
• Set 12 - Approximate Analysis of the BJT Diff Amp. Differential and Common-Mode Analysis of the BJT Diff Amp.
• Set 13 -

  MOSFET Pi Model with Body Effect
  MOSFET T Model with Body Effect
  MOSFET Simplified T Model with Body Effect
  MOSFET Thevenin Source Circuit with Body Effect
  MOSFET Summary with Body Effect
  

• Set 14 - Single-Stage MOSFET Amplifiers with Body Effect.
• Set 15 - Two-Stage MOSFET Common-Gate Amplifier with Body Effect.
• Set 16 - MOSFET Differential Amplifier with Body Effect.
• More notes on MOSFET circuits to be added here. See notes for last semester for examples.
• BJT Current Mirrors - The basic mirror, the mirror with base current compensation, the Wilson mirror, the low-level mirror, the transconductance op amp, and an example am modulator.
• 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.

Summary Formula Sheets

BJT Summary Formulas
MOSFET and JFET Summary Formulas

Spring 2003 Class Documents

Other Class Documents

Chebyshev Transfer Functions

Fall 2002 Class Documents

Diagrams of Circuits Analyzed in Class

Set 01 - Cascade BJT-CE/JFET-CS Amplifier, Cascade MOSFET-CG/MOSFET-CG Amplifier, BJT Emitter Coupled Amplifier
Set 02 - BJT Differential Amplifier with a Current Source Tail Supply
Set 03 - BJT Differential Amplifier with a Resistive Tail Supply
Set 04 - MOSFET Differential Amplifier with a Current Source Tail Supply
Set 05 - MOSFET Differential Amplifier with a Resistive Tail Supply
Set 06 - BJT Differential Amplifier with a Resistive Tail Supply - Differential and Common-Mode Analyses
Set 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
Set 08 - Transconductance Op Amp, Circuit Symbol, AM Modulator Example Application
Set 09 - JFET Current Source, BJT Current Source, VBE Multiplier, Complementary Common-Collector Stage
Set 10 - BJT Operational Amplifier (Op Amp) Connected as a Non-Inverting Amplifier, Equivalent Circuit Using the Operational Amplifier (Op Amp) Symbol
Set 11 - Op amp symbol and its controlled source model. Op amp with positive and negative feedback. Inverting amplifier and its controlled-source model.
Set 12 - Inverting amplifier with a T feedback network. Current to voltage converter. Non-inverting amplifier and its controlled source model.
Set 13 - Voltage follower. Inverting summer. Negative impedance converter.
Set 14 - Non-inverting summer. One op-amp diff amp. Diff amp with a floating source.
Set 15 - Switch hitter. Two op-amp diff amp. Instrumentation amplifier.
Set 16 - Basic op amp model. Equivalent circuit of model. Circuit for calculating I_o1.

Spring 2002 Class Documents

BJT Single Stage Amplifier Examples

A Common-Emitter Amplifier Mathcad Example
A Common-Base Amplifier Mathcad Example

Multi-Stage BJT Amplifier Examples

A Cascode Amplifier Mathcad Example
Differential Amplifier Example - A Mathcad example.

Single-Stage MOSFET Amplifier Examples

A Common-Source Amplifier Mathcad Example
A Common-Drain Amplifier Mathcad Example
A Common-Gate Amplifier Mathcad Example

Other Class 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.

Summer 2001 Class Documents

Guidelines for Submitting Homework
Summary of BJT Formulas
Summary of MOSFET and JFET Formulas

Spring 2001 Class Documents

Junction Diode - Covers the basic operation of the diode, its i-v characteristics, and its small-signal model.
Superposition Examples - Examples to illustrate the use of superposition with controlled sources.
Common-Collector Amplifier Example - A MathCad example.
Common-Base Amplifier Example - A MathCad example.
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.
Feedback Amplifier Analysis. These notes are not complete, but they explain how to use flow graphs and have one and a half examples.
Some Practice Problems.

Supplementary Notes for Fall Semester 2000

Practice Problems for Quiz 2
Practice Problems for Quiz 3
Analog Behavioral Modeling Example in PSpice.

Summer 2000 Class Documents

Common Collector Amplifier Example
Common Emitter Amplifier Example
Common Base Amplifier Example

Spring 2000 Class Documents

Common Emitter Amplifier Example
Common Collector Amplifier Example
Common Base Amplifier Example
CE-CC Amplifier Example

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.

This page is not a publication of the Georgia Institute of Technology and the Georgia Institute of Technology has not edited or examined the content. The author of this page is solely responsible for the content. Copyright 2004. All rights reserved.