ECE 220

Basic Circuits
Fall and spring
Catalog Data: 

ECE 220 - Basic Circuits (5 units)

Description: Elementary, transient and sinusoidal analysis of linear circuits with laboratory. Topics include passive sign convention, mesh and node analysis, Thevenin equivalents, op-amps, capacitance, inductance, first and second order circuits, phasors, impedance, transformers and PSpice simulation software.

Grading: Regular grades are awarded for this course: A B C D E

Course Fee: $100

MATH 129 and PHYS 241. Prerequisite or concurrent enrollment in MATH 254.

Nilsson, James W., and Susan A. Riedel. Electric Circuits. 10th ed. Prentice Hall, 2015.

Course Learning Outcomes: 

By the end of this course, the student will be able to:

  1. Apply knowledge of mathematics, science and engineering
  2. Design and conduct experiments, as well as analyze and interpret data
  3. Identify, formulate and solve engineering problems
  4. Communicate effectively in writing
  5. Use the techniques, skills and modern engineering tools necessary for engineering practice
Course Topics: 

Circuit Variables (2 lectures)

  • Overview of electrical engineering and circuit analysis
  • Voltage and current
  • The ideal basic circuit element
  • Reference directions
  • Power and energy

Circuit Elements (3 lectures)

  • Voltage and current sources
  • Electrical resistance and Ohm's law
  • Construction of a circuit model
  • Kirchhoff's laws
  • Dependent sources

Simple Resistive Circuits (4 lectures)

  • Resistors in series and in parallel
  • The voltage-divider circuit
  • The current-divider circuit
  • Measuring voltage and current
  • The Wheatstone bridge
  • Delta-Wye equivalent circuits

Techniques of Circuit Analysis (13 lectures)

  • Introduction to the node-voltage method: node-voltage analysis with dependent sources, some special cases
  • Introduction to mesh currents: mesh current analysis with dependent sources, some special cases
  • The node-voltage method versus the mesh current method
  • Source transformations
  • Thevenin and Norton equivalent circuits
  • Maximum power transfer
  • Superposition

The Operational Amplifier (8 lectures)

  • Operational amplifier terminals
  • Terminal voltages and currents
  • Inverting, summing, noninverting, difference, comparators and integrating amplifier circuits

Inductance, Capacitance, Mutual Inductance (4 lectures)

  • Properties of the inductor
  • Properties of the capacitor
  • Series and parallel combinations of inductance and capacitance
  • Mutual inductance

Response of First-Order RL and RC Circuits (6 lectures)

  • Natural response of RL and RC circuits
  • Step response of RL and RC circuits
  • A general solution for step and natural responses
  • Sequential switching
  • Unbounded response

Natural and Step Responses of RLC Circuits (6 lectures)

  • Natural and step responses of a parallel RLC circuit
  • Natural and step responses of a series RLC circuit

Sinusoidal Steady-State Analysis (10 lectures)

  • Sinusoidal sources and response
  • Phasors
  • Impedance and admittance
  • Series-parallel and Delta-Wye simplifications
  • Source transformations and Thevenin-Norton equivalents
  • Node and mesh analysis
  • Transfer functions
  • Ideal transformers
  • Impedance matching
  • Phasor diagrams
Class/Laboratory Schedule: 

Five 50-minute lectures per week
Five 3-hour lab sessions spread throughout the semester

Relationship to Student Outcomes: 

ECE 220 contributes directly to the following specific electrical and computer engineering student outcomes of the ECE department:

  • Ability to apply knowledge of mathematics, science and engineering (high)
  • Ability to design a system, component or process to meet desired needs within realistic constraints, such as economic, environmental, social, political, ethical, health and safety, manufacturability and sustainability (medium)
  • Ability to communicate effectively (low)
  • Ability to use the techniques, skills and modern engineering tools necessary for engineering practice (low)
Prepared by: 
Michael Marcellin
Prepared Date: 

University of Arizona College of Engineering