The Plan

1
The Plan

• Review RC and RL circuits
• Introduce RLC circuits
• Exercise
• Final Exam

2
Useful reminder

• Inductive and capacitive reactance

3
Impedance

• Total opposition to sinusoidal current
• Symbol is Z unit is Ohm

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What kind of a filter is this?
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Express the impedance in rectangular and polar
form.
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What is the cutoff frequency? What is the phase
shift at 1kHz? At 20 kHz?
9

• What kind of filter is this?

10

• Express the impedance in rectangular and polar
  form.

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• What is the phase shift at 5 kHz? At 20 kHz?

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RL Filter (low pass)
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Frequency response curve
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RL Filter (high pass)
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Frequency response curve
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RLC Circuits
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What is the impedance in rectangular and polar
form?
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Resonance
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Resonance
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What is the resonant frequency?What is the
capacitive/inductive reactance and impedance at
the resonant frequency?