Introduction to Resonant Circuits

Chapter CHAPTER 7 Resonant Circuits

Complete Electronics Self Teaching Guide with Projects
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Complete Electronics Self Teaching Guide with Projects

  • 7Resonant CircuitsYou have seen how the inductor and the capacitoreach present an opposition to the flow of an AC current, and how the magnitude of this reactance depends upon the frequency of the applied signal.When inductors and capacitors are used together in a circuit (referred to as an LC cir-cuit), a useful phenomenon called resonance occurs. Resonance is the frequency at which the reactance of the capacitor and the inductor is equal.In this chapter, you learn about some of the properties of resonant circuits, and concentrate on those properties that lead to the study of oscillators (which is touched upon in the last few problems in this chapter and covered in more depth in Chapter 9, “Oscillators”).Book Authorc07V107/04/2012 3:13 PM c07.indd 2677/4/2012 3:13:25 PM