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

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

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.

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.

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 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

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.

- 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
- CE Amplifier Mathcad 7 Example
- The Common-Collector (CC) Amplifier - Basic Circuit, DC Solution, Small-Signal Solution, Example
- CC Amplifier Mathcad 7 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
- CB Amplifier Mathcad 7 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
- Diff-Amp Mathcad 7 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.

01. Cascade BJT-CE/JFET-CS Amplifier, Cascade MOSFET-CG/MOSFET-CG Amplifier, BJT Emitter Coupled Amplifier

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 *I*_{o1}.

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

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

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

01. Circuit Theory Review, Superposition Examples, Amplifier Representations

02. Diode

03. BJT Review, Hybrid-Pi Model, T Model

04. MOSFET Review, Hybrid-Pi Model, T Model, BJT Bias Examples

05. MOSFET Bias Equation, JFET Review

06. BJT Simplified T Model

07. BJT Norton Collector Circuit

08. BJT Thévenin Base Circuit

09. BJT Thévenin Emitter Circuit

10. BJT Summary of Models

11. Common-Emitter Amplifier, CE Amplifier Mathcad 7 Example, Second CE Example

12. Common-Base Amplifier, Mathcad CB Example

13. Common-Collector Amplifier, Mathcad CC Example, Second CC Example

14. BJT Differential Amplifier with Current Source Tail Supply

15. Approximate Analysis of BJT Diff Amp, Differential and Common-Mode Analysis of BJT Diff Amp

16. BJT Differential Amplifiers

17. MOSFET Pi Model with Body Effect

18. MOSFET T Model with Body Effect

19. MOSFET Simplified T Model with Body Effect

20. MOSFET Thevenin Source Circuit with Body Effect

21. MOSFET Summary with Body Effect

22. Single-Stage MOSFET Amplifiers with Body Effect.

23. Two-Stage MOSFET Common-Gate Amplifier with Body Eff

24. MOSFET Differential Amplifier with Body Effect.

25. BJT Current Mirrors and the transconductance op amp

26. More MOSFET Topics

27. Oscillators and Non-Linear Circuits

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

- Common-Base Amplifier using r
_{0}approximations. - Single Stage BJT Amplifiers. Covers the exact solutions and the r
_{0}approximations to both NPN and PNP single-stage amplifiers.

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.

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

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.

A Common-Base Amplifier Mathcad Example

A Cascode Amplifier Mathcad Example

Differential Amplifier Example - A Mathcad example.

A Common-Source Amplifier Mathcad Example

A Common-Drain Amplifier Mathcad Example

A Common-Gate Amplifier Mathcad Example

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.

Guidelines for Submitting Homework

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.

Practice Problems for Quiz 2

Practice Problems for Quiz 3

Analog Behavioral Modeling Example in *PSpice*.

Common Collector Amplifier Example

Common Emitter Amplifier Example

Common Base Amplifier Example

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.*