;

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.