472 Lecture 9a Bode plots

# 472 Lecture 9a Bode plots - Lecture 9a Bode plots Bode...

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Lecture 9a 1 Lecture 9a Bode plots • Bode plots of simple transfer functions • Frequency analysis using PSpice EEE 498/591 – Raja Ayyanar

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Lecture 9a 2 -90 0 Bode plots ( ) ( ) 10 Magnitude plot 20 log in . Gj d Bv s ww ( )( ) Phase plot indeg . v s  Integrator () K Gs s = Frequency 100mHz 1.0Hz 10Hz 100Hz 1.0KHz P(V(VO1)) -200d -100d 0d DB(V(VO1)) -50 0 50 SEL>> K rad/sec -20 db/dec EEE 498/591 – Raja Ayyanar
Lecture 9a 3 Bode plots Single Pole () 1 1 p Gs s w = + Frequency 100mHz 1.0Hz 10Hz 100Hz 1.0KHz P(V(VO1)) -45 -100 -50 0 DB(V(VO1)) -3 -40 -20 0 20 SEL>> rad/sec p w -20 db/dec -90 0 -45 0 EEE 498/591 – Raja Ayyanar

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Lecture 9a 4 Bode plots Single zero () 1 z s Gs w =+ Frequency 100mHz 1.0Hz 10Hz 100Hz 1.0KHz P(V(VO1)) 45 0 50 100 DB(V(VO1)) 3 -20 0 20 40 SEL>> rad/sec z w +20 db/dec 90 0 45 0 EEE 498/591 – Raja Ayyanar
Lecture 9a 5 Frequency 100mHz 1.0Hz 10Hz 100Hz 1.0KHz P(V(VO1)) -45 -100 -50 0 SEL>> DB(V(VO1)) 3 -20 0 20 40 Bode plots Right half plane zero () 1 z s Gs w =- rad/sec z w +20 db/dec -90 0 -45 0 • System with RHP zero is difficult to compensate EEE 498/591 – Raja Ayyanar

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Lecture 9a 6 Bode plots Complex pole pair () 2 2 1 2 1 n n Gs s s d w

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472 Lecture 9a Bode plots - Lecture 9a Bode plots Bode...

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