1. Dr. Cynthia Furse University of Utah
Introduction to Electrical & Computer Engineering Phasor Domain Analysis
Dr. Cynthia Furse
University of Utah
Dr. Cynthia Furse
University of Utah

2. Impedance & Phasor Domain Analysis
Impedance (Z) (ch 7-2)
Resistance R
Capacitance 1/jωC
Inductance jωL
Ohm’s Law Z = V/ I (ratio of voltage to current, including phase shifts)
Phasor Domain Analysis (ch 7-3)
Impedance Transformation (ch 7-4)

3. Impedance and Admittance
Impedance is voltage/current
Admittance is current/voltage
R = resistance = Re(Z)
G = conductance = Re(Y)
X = reactance = Im(Z)
B = susceptance = Im(Y)
Resistor
Inductor
Capacitor
Circuits, Second Edition by Fawwaz T. Ulaby and Michel M. Maharbiz, © NTS Press, Used with Permission by the Publisher
All rights reserved. Do not copy or distribute. © 2013 National Technology and Science Press

4. Impedances in Series Add
Z (Ω) = R + (1/jωC) + jωL Need to know ω = 2πF

5. Admittances in Parallel Add
Y = 1/Z = 1/R + jωC + 1/jωL Need to know ω = 2πF

6. OR use Impedances in Parallel
Z (Ω) = 1 / [ 1/R + jωC + 1/jωL ] Need to know ω = 2πF

7. Problem 7.23

8. Problem 7.23

9. Ohm’s Law
Ohm’s Law v(t) = i(t) R Ohm’s Law (impedance) V = I Z

10. Voltage & Current Division
Y=1/Z
Circuits, Second Edition by Fawwaz T. Ulaby and Michel M. Maharbiz, © NTS Press, Used with Permission by the Publisher
All rights reserved. Do not copy or distribute. © 2013 National Technology and Science Press

14. Dr. Cynthia Furse University of Utah
Introduction to Electrical & Computer Engineering Antelope Island, Great Salt Lake, Utah
Dr. Cynthia Furse
University of Utah