标签: feedbackto

LNADesignUsesSeriesFeedbacktoAchieveSimultaneousLowInputVSWRandLowLNADesignLNADesignUsesSeriesFeedbacktoAchieveSimultaneousLowInputVSWRandLowNoiseByDaleD.HenkesSonyPMCAhenoisefigureofaZsourceZloadZinZoutsinglestagetransistoramplifierisafunctionoftheimpedZganceappliedtotheinputTransistor/terminalsofthetransisInputOutputTwo-Porttor.Thisimpedance,ZLmatchingmatchingS11S12calledthesourceimpednetwork[S21S22]networkance,isshowninFigure1asZsource.TypicallythesourceimpedancethatproducesaconjugateGS,GOptGLGinGoutmatchtotheinputimpedanceofthetransistor(Zin)isnotthesamesFigure1.Thegeneralizedanalyticalformofthelownoiseamplifier.impedanceaswouldberequiredtoproduceaminimumnoisefigurefortheamplifier.Theoverallsystemperformanceisproba……