2nd order circuits/systems

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class notes, M. Rodwell, copyrighted 2011 ECE 2C, notes set 9: Second-Order Circuits Mark Rodwell University of California, Santa Barbara [email protected] 805-893-3244, 805-893-3262 fax

Transcript of 2nd order circuits/systems

Page 1: 2nd order circuits/systems

class notes, M. Rodwell, copyrighted 2011

ECE 2C, notes set 9: Second-Order Circuits

Mark Rodwell

University of California, Santa Barbara

[email protected] 805-893-3244, 805-893-3262 fax

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class notes, M. Rodwell, copyrighted 2011

Goals:

analysisTransient

analysis responseFrequency

domain.in function Transfer

Analysis

SystemsOrder -nd2

s

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Parallel RLC Resonance

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Parallel RLC Resonance: Analysis

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Parallel RLC Resonance: Frequency Reponse

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Bode Plot of Resonance

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Poles, Zeros

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Poles, Zeros

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Root Locus

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Root Locus: For Underdamped System

21 where nd

1dnp js 2,1

22 /)/2(1

)/2()(

nn

n

ss

ssH

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class notes, M. Rodwell, copyrighted 2011

Root Locus: For Overdamped System

1

complex. is 1then

,1 ifbut

2

nd

dnp js 2,1

11

use then ,1 If

22

nnd jj

1

So

2

2,1

nn

dnp js

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class notes, M. Rodwell, copyrighted 2011

Root Locus: For Overdamped System

1

1 2

2,1

nn

dnp js

22 /)/2(1

)/2()(

nn

n

ss

ssH

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Quality factor of an Energy Storage Element

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Quality factor of an Energy Storage Element

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-3 dB (Half-Power) Bandwidth

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Impulse Response

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Impulse Response

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Impulse Response

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Series RLC Circuit

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Another Resonant Circuit

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Another Resonant Circuit

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Impulse Response

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Impulse Response

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Recall Step Response: Not Derived Here Again

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Low-Pass, 2nd-Order Filters

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Band-Pass 2nd-Order Filters

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High-Pass 2nd-Order Filters

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