2' Order Circuit and Bode Plots

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2. Order Circuit and Bode Plots

• Circuit Theory
• AUE 2007
• Bo Rohde Pedersen

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Transfer functions
En samling af 1. ordens kredsløb
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Phase
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Phase
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Phase
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Phase
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Bode plot

• Magnitude -gt Modulus
• Phase -gt Argument

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Drawing Bode Plots From Transfer Function

• By hand
• Write transfer function poles (s-a) and zeros
  (s-ß)
• Draw the Low/and high frequency lines
• 3 dB difference by pole or zeros

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Adding Two Filters
Example
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Series and Parallel RLC Circuits
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Second Order Systems,Frequency Domain
Natural frequency
?n is the natural frequency ?R is the resonance
frequency
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2. order system Time domain

• Complex 2. order system
• Input step response