Lecture 15:
Extra More on Sinusoidal SteadyState Analysis & MT Review
Nilsson & Riedel 9.7-9.9, 9.12
ENG17 (Sec. 2): Circuits I
Spring 2014
May 20, 2014
1
Overview
• Source
Transformations
• Node-Voltage
• Mesh-Current
• Phasor Diagrams
• MT Review
2
Source Transformations
Same as before, but now with impedances
3
Thevenin-Norton Equivalents
4
Example
Find using
source
transformation
5
Example
Find Thevenin
Equivalent
6
Overview
• Source
Transformations
• Node-Voltage
• Mesh-Current
• Phasor Diagrams
• MT Review
7
Node-Voltage Example
Find Ia, Ib, Ic
8
Overview
• Source
Transformations
• Node-Voltage
• Mesh-Current
• Phasor Diagrams
• MT Review
9
Mesh-Current Example
Find Va, Vb, Vc
10
Overview
• Source
Transformations
• Node-Voltage
• Mesh-Current
• Phasor Diagrams
• MT Review
11
Phasor Diagrams
12
Example
Use phasor diagram to find R that will cause
resistor current (iR) to lag the source current (iS)
by 45° when ω = 5 krad / s.
13
Overview
• Source
Transformations
• Node-Voltage
• Mesh-Current
• Phasor Diagrams
• MT Review
14
Difficulties
15
Op Amp Circuits
16
Sequential Switching
17
Unbounded Response
18
RLC Circuits
19
Phasors
20
Extra Office Hours
• Tomorrow, Wednesday
• 3-5pm
• Kemper 2101
21