ECE 2204
Electronics I
Kathleen Meehan
460 Whittemore Hall
kameehan@vt.edu
Topics Covered
• Semiconductor Materials
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Direct and indirect bandgap energies and energy diagrams
Intrinsic carrier concentration and doping with impurities
Resistivity and resistance
Drift and diffusion currents
• Diodes
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Clipping and Clamping Circuits
Rectifying Circuits
Voltage Regulators
LEDs and Photodetectors
• Transistors
▫ Metal Oxide Semiconductor Field Effect Transistor (MOSFET)
▫ Bipolar Junction Transistor (BJT)
• Digital Logic Circuits
▫ Diode Logic
▫ NMOS, PMOS, and CMOS
▫ Diode-Transistor Logic (DTL) and Transistor-Transistor Logic (TTL)
Texts:
Required:
Jaeger and Blalock
Microelectronic Circuit Design,
McGraw-Hill (2007)
Recommended:
J.R. Nilsson and S.A. Riedel,
Introduction to PSpice Manual for Electric Circuits,
4th Edition Prentice Hall, (2000)
OR
J.G. Tront, PSpice for Basic Circuit Analysis,
1st Edition, McGraw-Hill, (2004)
Textbook
• You have access to an electronic version of Jaeger and
Blalock for free on the course Scholar site.
▫ You may not have access to this in future semesters. This book
is also used in ECE 3204. You can download the book as a .pdf in
chunks of 50 pages. You should do this. I also suggest that you
purchase a used copy of either the course textbook or
Microelectronic Circuit Design and Analysis by Neaman for your
personal professional library.
• Jaeger uses the same symbols for MOSFETs as is used in
PSpice; however, there are several alternative symbols for
MOSFETS.
▫ I like some of the other symbols better and may use them on
occasion. Feel free to remind me to stick with the ones that
Jaeger is using.
Grading
In-Class Work
Homework
Exam 1 ‡
Exam 2 ‡
Exam 3 ‡
Final ‡
10%
15%
75%
The final will not be cumulative.
Your lowest score on Exams 1-3 and
the Final will be dropped when
calculating your final exam average.
Homework Assignments
• I make up problems for homework assignments.
▫ There are numerous problems worked out in the textbook and there
are solutions to most of the answers to the questions in the back of the
chapter readily available.
▫ I post solutions to the homework assignments. I do not post solutions
to the example exams that I provide.
▫ You may use PSpice to check your answers. Do not rely on this as you
will not be able to use PSpice on exams.
• When we start analyzing digital logic circuits, I will define the
logic levels that will be equal to a logical “0” and “1”.
▫ These will be used as the default levels on all calculations.
• I plan to ask you to perform a few experiments to see how
certain circuits operation. Work will be done in pairs and may
be performed in class. You will have to submit the results as
part of your homework assignments.
▫ Make sure that you have access to an ANDY board, scope, and the
parts kit.
Exams
• I provide equation sheets for each exam.
• Piecewise models will be provided
▫ For diodes only on Exam 1
▫ For MOSFETs only on Exam 2
▫ For BJTs only on Exam 3
Answers on HW and Exams
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Use 3 significant digits always
Use units always
Use prefixes when appropriate
Scientific notation is only used in some solutions for
questions on semiconductor materials and device
physics.
• A correct answer includes work to substantiate your
final result.
▫ You may use your favorite analysis technique from ECE
2004 (e.g., mesh or nodal analysis) when calculating
currents and voltages in a circuit.
Nomenclature
Variable
Meaning
iB, vBE
Total instantaneous values
IB, VBE
dc values
ib, vbe
ac values
Ib, Vbe
Phasor values
Analysis of DC circuits or slowly-varying AC circuits will dominate in this course.