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Lecture Notes - Chapter 7

Resonant Circuits

  • The Capacitor and Inductor in Series
    • Introduce the term RLC circuit (figure 7.2).
    • Discuss the equation for net reactance of a capacitor and inductor in series.
    • Discuss the equation for the impedance of an RLC circuit.
    • Discuss the variation in Vout with frequency for an RLC circuit with Vout  taken across the resistor. (figure 7.4).
    • Introduce the term; resonance frequency (fr).
    • Discuss the equation for the resonance frequency of an RLC circuit.
    • Discuss the variation in Vout with frequency for an RLC circuit with Vout  taken across the capacitor and inductor (figure 7.6).
    • Introduce the term; notch filter.
  • Project 7.1, The Notch Filter.
    • Review the circuit diagram (figure 7.7).
    • Discuss the test setup (figure 7.10).
  • The Capacitor and Inductor Parallel in an RLC circuit
    • Discuss the equation for the resonance frequency of an RLC circuit when the capacitor and inductor are parallel.
    • Introduce the term: DC resistance of the inductor (r).
    • Discuss the equation for the resonance frequency when XL is greater than 10 times the DC resistance of the inductor.
    • Introduce the term: quality factor of the circuit (Q).
    • Discuss the equation for Q.
    • Discuss the variation in Vout with frequency for an parallel RLC circuit with Vout  taken across the resistor (figure 7.16).
    • Discuss the variation in Vout with frequency for a parallel RLC circuit with Vout  taken across the capacitor and inductor (figure 7.18).
  • The Output Curve
    • Introduce the term: half power points (figure 7.19).
    • Introduce the term: bandwidth (BW).
    • Discuss the equation for bandwidth.
    • Introduce the term: bandpass filter.
    • Compare the output curve for a bandpass filter (figure 7.20) to the output curve of a notch filter (figure 7.21).     
  • Project 7.2 The Band Pass Filter
    •  Review the circuit diagram (figure 7.22).
    • Discuss the test setup (figure 7.25).

 

This page includes material extracted, by permission of the publisher, Wiley Publishing, from Complete Electronics Self-Teaching Guide with Projects, ISBN: 9781118217320.

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