Lecture 15: Extra More on Sinusoidal Steady- State Analysis & MT Review Nilsson & Riedel , 9.12 ENG17 (Sec. 2): Circuits I Spring May 20, 2014

Overview Source Transformations Node-Voltage Mesh-Current Phasor Diagrams MT Review 2

Source Transformations 3 Same as before, but now with impedances

Thevenin-Norton Equivalents 4

Example 5 Find using source transformation

Example 6 Find Thevenin Equivalent

Overview Source Transformations Node-Voltage Mesh-Current Phasor Diagrams MT Review 7

Node-Voltage Example 8 Find I a, I b, I c

Overview Source Transformations Node-Voltage Mesh-Current Phasor Diagrams MT Review 9

Mesh-Current Example 10 Find V a, V b, V c

Overview Source Transformations Node-Voltage Mesh-Current Phasor Diagrams MT Review 11

Phasor Diagrams 12

Example 13 Use phasor diagram to find R that will cause resistor current (i R ) to lag the source current (i S ) by 45° when ω = 5 krad / s.

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

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