Transcription of ChapterII RF-CIRCUITS
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Class Notes, 31415 RF-Communication Circuits Chapter IIRF-CIRCUITSJens Vidkj rNB230 iiContentsII RF-CIRCUITS , Concepts and 1II-1 Parallel Resonance 2 Frequency 3 Poles and 6 Transient 8II-2 Series Resonance circuit 11II-3 Narrowband 14II-4 Series-to-Parallel 19 Example II-4-1 ( impedance matching ).. 20 Conversions in Narrowband 23 Conversions in Broadband 26 Example II-4-2 ( spiral inductor ).. 26II-5 Tuned 30 Synchronously Tuned 32 Example II-5-1 ( synchronous tuning ).. 33 Butterworth Stagger Tuned 36 Example II-5-2 ( Butterworth amplifier ).
Fig.6 sketches the geometry of complex pole and zero positions. Starting from damping ζ=1 (18) ( Q=½) the poles are by Eq.(17)(a) constrained to move along a circle of radius ω0 from the real towards the imaginary axis with declining damping or growing Q. Once the poles and
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