lec24 - Summary of Lecture #24 10/21/09 Filters with real...

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1 2 Summary of Lecture #24 10/21/09 Filters with real or practical inductors and capacitors Series and parallel circuit models for real inductors, L and Q L Parallel and series circuit models for real capacitors, C, Q C and d C Two examples 3 Primary circuit element: Inductance, L Parasitic circuit elements: Wire resistance, R s Capacitance between conductors, C p Leakage resistance, R p Quality factor of inductor at a certain frequency, Q L Circuit models of real inductors Values typically given: Nominal inductance : L Coil Q at certain frequency : Q L s L R L Q ϖ = L s Q L R ϖ = 4 Circuit models of real capacitors Primary circuit element: Capacitance C Parasitic circuit elements: Wire resistance R s Wire inductance L s Leakage resistance R p Quality factor of capacitor at a certain frequency Q c = ϖ CR p Dissipation factor : d c =1/Q C Values typically given: Nominal capacitance: C Dissipation factor at a certain freq.: d C p c c CR 1 Q 1 d ϖ = = C p Q
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lec24 - Summary of Lecture #24 10/21/09 Filters with real...

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