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Lecture 15:Extra More on Sinusoidal Steady-State Analysis & MT ReviewNilsson & Riedel 9.7-9.9, 9.12

ENG17 (Sec. 2): Circuits I

Spring 2014

May 20, 2014

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Overview

• Source Transformations

• Node-Voltage• Mesh-Current• Phasor Diagrams• MT Review

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Source Transformations

Same as before, but now with impedances

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Thevenin-Norton Equivalents

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Example

Find using source transformation

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Example

Find Thevenin Equivalent

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Overview

• Source Transformations

• Node-Voltage• Mesh-Current• Phasor Diagrams• MT Review

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Node-Voltage Example

Find Ia, Ib, Ic

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Overview

• Source Transformations

• Node-Voltage• Mesh-Current• Phasor Diagrams• MT Review

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Mesh-Current Example

Find Va, Vb, Vc

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Overview

• Source Transformations

• Node-Voltage• Mesh-Current• Phasor Diagrams• MT Review

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Phasor Diagrams

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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.

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Overview

• Source Transformations

• Node-Voltage• Mesh-Current• Phasor Diagrams• MT Review

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Difficulties

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Op Amp Circuits

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Sequential Switching

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Unbounded Response

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RLC Circuits

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Phasors

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Extra Office Hours

• Tomorrow, Wednesday• 3-5pm• Kemper 2101