标签: sky77321

SKY77321AdvanceInformationThisdocumentcontainsinformationonaproductunderdevelopment.Theparametricinformationcontainstargetparametersthataresubjecttochange.SKY77321PAModuleforTri-bandEGSM900DCS1800PCS1900/GPRSTheSKY77321PowerAmplifierModule(PAM)isdesignedinacompactformfactorfortri-bandcellularhandsetscomprisingEGSM900,DCS1800,andPCS1900operation.ItalsosupportsClass10GeneralPacketRadioService(GPRS)multi-slotoperation.ThePAMconsistsofanEGSM900PAblock,aDCS1800/PCS1900PAblock,impedance-matchingcircuitryfor50inputandoutput,andbiascontrolcircuitry.TwoseparateHeterojunctionBipolarTransistor(HBT)PAblocksarefabricatedonasingleGalliumArsenide(GaAs)die.OnePAblockoperatesintheEGSM900bandandthe……