Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

162 FREQUENCY MODULATION, Volume IThe circuit is resonant at V2"x the source frequency, i.e., C in theabove figure is half the value required for circuit resonance at thesource frequency. Therefore, LC =-12aand_(RCw, +.)'•'2, + j'l \ 12RCu,-jl JRCu, + jju>tCThe absolute magnitude of £ is therefore \g\ — .which is independentof R.(2) The phase vs. R equation of the circuit is readily determinedfrom the above, viz:_ / 2RCv>, + ;1 \ 1 1 / 1 - / 2RCa,\ 2RCa>, - ;1 / >,C a>,C \ 2RCu>, - ;1total phase shift