ChapterII RF-CIRCUITS - DTU

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 ).. 41II-6 Transformers and Transformerlike 45 Review of Mutual 45 Equivalent Circuits for Two Coupled 53 Example II-6-1 ( practical RF transformers ).. 55 Tuned 57 Example II-6-2 ( transformer-coupled tuned amplifier ).. 61 Example II-6-3 ( autotransformers in a tuned amplifier ).

circuit in Fig.1. The curves are symmetric around ωo due to the logarithmic fre-quency scales. (8) in Fig.3 , correspond to a denominator size equal to 2 in Eq.(7). The bounds are found setting the imaginary part of the denominator equal in magnitude to the real part, i.e. Both negative and positive frequencies are contained in the conditions.

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