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采用BFG540WX晶体管的400MHz驱动放大器PhilipsSemiconductorsB.V.Gerstweg2,6534AENijmegen,TheNetherlandsReportnr.AuthorDateDepartment:RNR-T45-97-B-0920:T.F.Buss:20-11-97:P.G.Transistors&Diodes,Development400MHzLOWNOISEAMPLIFIERWITHTHEBFG540W/XAbstract:ThisapplicationnotecontainsanexampleofaLowNoiseAmplifierwiththeBFG540W/XRF-transistor.TheLNAisdesignedforafrequencyf=400MHz,VSUP=3.0V,ISUP~7.5mA.Measuredperformanceatf=400MHz:NoiseFigureNF~1.0dB,rf-GainS21~15.5dB,Input_IP3~2dBmApplications:LNAfora400MHzCDMAsystem(Chinesemarket).AppendixI:400MHzLNAcircuitAppendixII:Printlayoutandlistofusedcomponents&materialsAppendixIII:Resultsofsimulationsandmeasurements1PhilipsSemiconductorsB.V.Introduction:WithPhilipssiliconwide……