A 17-mW transmitter and frequency synthesizer for 900-MHz GSM fully integrated in 0.35-μm CMOS 2003

《A 17-mW transmitter and frequency synthesizer for 900-MHz GSM fully integrated in 0.35-μm CMOS 2003》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、782IEEEJOURNALOFSOLID-STATECIRCUITS,VOL.38,NO.5,MAY2003A17-mWTransmitterandFrequencySynthesizerfor900-MHzGSMFullyIntegratedin0.35-mCMOSEmadHegazi,Member,IEEE,andAsadA.Abidi,Fellow,IEEEAbstract—Afractional-phase-lockedloop(PLL)servesasaGaussianminimum-shiftkeyi

2、ng(GMSK)transmitterandareceivefrequencysynthesizerforGSM.Theentiretrans-mitter/synthesizerisfullyintegratedin0.35-mCMOSandconsumes17.4and12mWfrom2.5Vinthetransmitandreceivemodes,respectively,includinganon-chipvoltage-controlledoscillator.ThecircuitmeetsGSMspeci

3、ficationsonmodulationaccuracyintransmitmode,andmeasuredphasenoisefromtheclosed-loopPLLis148dBcHzand162dBcHz,respectively,at3-and20-MHzoffset.Worstcasespurat13-MHzoffsetis77dBc.IndexTerms—Constantenvelopemodulation,fractional-,fre-quencysynthesis,GSM,noisefilter

4、ing,sigma–delta,transmitter,voltage-controlledoscillator(VCO).I.INTRODUCTIONFig.1.BlockdiagramofcompleteGSMtransceiver,usingpreviouslypublishedreceiver.Thispaperdescribesfrequencysynthesizerandtransmitter.SMistoday’smostwidelyusedwirelessstandardforcel-Glularco

5、mmunication.Overthepastfewyears,manypub-lications[1]–[3]havedealtwiththechallengesofreceiverde-SectionVdiscussesthesimulationmethodologyandSectionVIsignforGSMhandsets.Transmittercircuits,ontheotherhand,presentsthemeasurementresults.seemnottoattractthesameattent

6、ion.PerhapsthisisbecausemostanalogcircuitdesignersthinkthatthetransmitterdoesnotII.GSMSYSTEMREQUIREMENTShavetoamplifyweaksignalsorcontendwithlargeinterferersSpecificationsimposedbysystemstandardsshould,properly,asthereceiverdoesand,therefore,itisacomparativelys

7、traight-guidethechoiceofarchitecture.Thissectioncoverstheimpor-forwardcircuit.TherealityisthatatransmitteraccompaniesthetantGSMspecificationsthatapplytothetransmitterandfre-receiverineverycellularphone,andapoorchoicecanpenalizequencysynthesizer.thebatterylifeof

8、theentirehandset.Inapreviouspublication,wehavepresentedafullyintegratedA.LocalOscillator(LO)SignalPuritydual-conversionreceiverin0.35-mCMOSforthe900-MHzIn-bandblockersintheG