标签: oscillators

THEDESIGNOF LOWNOISEOSCILLATORS

摘要：这种电路派生纯正弦波从晶体控制时钟源所使用的环形计数器来删除最高振幅有害的谐波，和过滤结果与8阶低通、开关电容椭圆筛选器（MAX7400）。Maxim>AppNotes>FilterCircuits(Analog)SignalGenerationCircuitsKeywords:sinewavegenerators,low-distortionsignalgenerators,crystal-stabilizedoscillators,ringcounters,weighted-resistanceDec21,2010networks,lowpassellipticfilters,switched-capacitorfiltersAPPLICATIONNOTE4547Low-CostCircuitConvertsClocktoLow-DistortionSinewaveAbstract:Thiscircuitderivesapuresinewavefromacrystal-controlledclocksourcebyusingaringcountertoremovethehighest-amplitudeunwantedharmonics,andfilteringtheresultwithan8th-orderlowpass,switched-capacitorellipticfilter(MAX7400).AsimilarversionofthisarticleappearedintheOctober2007issueofPDmagazine.Asimple,low-costcircuit(Figure1)usestheexistingclockinad……

PhaseNoiseinOscillatorsPhaseNoiseinOscillatorsAliHajimiriStanfordUniversity,Stanford,CA94305http://smirc.stanford.edu/papers/Orals98s-ali.pdfEmail:hajimiri@smirc.stanford.eduOutlineIntroductionandDefinitionsTime-VariantPhaseNoiseModelUpconversionof1/fNoiseCyclostationaryNoiseSourcesSubstrateandSupplyNoiseMeasurementResultsConclusionhttp://smirc.stanford.edu/papers/Orals98s-ali.pdfEmail:hajimiri@smirc.stanford.eduFrequencyInstability:TimeDomainKnownAsClockJitter.OscillatorOscilloscopeσ2Thttp://smirc.stanford.edu/papers/Orals98s-ali.pdfEmail:hajimiri@smirc.stanford.eduTimingJitterinDigitalApplicationsFlip-FlopDQCLKOscillatortsetuptholdClockDatahttp://smirc.stanford.edu/papers/Orals98s-ali.pdfEmail:hajimiri@smirc.stanford.ed……

CrystalOscillatorsandCircuitsCrystalOscillatorsandCircuitsBillSheetsK2MQJRudolfFGrafKA2CWLItisoftenrequiredtoproduceasignalwhosefrequencyorpulserateisverystableandexactlyknown.Thisisimportantinanyapplicationwhereanythingtodowithtimeorexactmeasurementiscrucial.Itisrelativelysimpletomakeanoscillatorthatproducessomesortofasignal,butanothermattertoproduceoneofrelativelyprecisefrequencyandstability.AMradiostationsmusthaveacarrierfrequencyaccuratewithin10Hzofitsassignedfrequency,whichmaybefrom530to1710kHz.SSBradiosystemsusedintheHFrange(2-30MHz)mustbewithin50Hzofchannelfrequencyforacceptablevoicequality,andwithin10Hzforbestresults.Somedigitalmodesusedinweaksignalcommunicationmayrequirefreq……

(eWiley)FundamentalsofRFCircuitDesignwithLowNoiseOscillatorsFUNDAMENTALSOFRFCIRCUITDESIGNwithLowNoiseOscillatorsFUNDAMENTALSOFRFCIRCUITDESIGNwithLowNoiseOscillatorsJeremyEverardUniversityofYork,UKJOHNWILEY&SONS,LTDChichesterNewYorkWeinheimBrisbaneSingaporeTorontoCopyright2001byJohnWiley&Sons,LtdBaffinsLane,Chichester,WestSussex,PO191UD,EnglandNational01243779777International(+44)1243779777e-mail(forordersandcustomerserviceenquiries):cs-books@wiley.co.ukVisitourHomePageonhttp://www.wiley.co.ukorhttp://www.wiley.comAllRightsReserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,scanningorotherwise,exceptunderthetermsoftheCopyri……

INTEL_AP-155_OscillatorsforMicrocontrollersAP-155APPLICATIONNOTEOscillatorsforMicrocontrollersTOMWILLIAMSONMICROCONTROLLERTECHNICALMARKETINGJune1983OrderNumber230659-001InformationinthisdocumentisprovidedinconnectionwithIntelproductsIntelassumesnoliabilitywhatsoeverincludinginfringementofanypatentorcopyrightforsaleanduseofIntelproductsexceptasprovidedinIntel’sTermsandConditionsofSaleforsuchproductsIntelretainstherighttomakechangestothesespecificationsatanytimewithoutnoticeMicrocomputerProductsmayhaveminorvariationstothisspecificationknownaserrataOtherbrandsandnamesarethepropertyoftheirrespectiveownersSincepublicationofdocumentsreferencedinthisdocumentregistrationofthePentiumOverDriveandiCOMPtrademarkshasbeenissue……

SIMULATIONANDDESIGNOFRFOSCILLATORS（稍微看下，不是我想要的)SIMULATIONANDDESIGNOFRFOSCILLATORSL.Eichinger1,F.Sischka1,G.Olbrich2,R.Weigel3AgilentTechnologies,Germany,2MunichUniversityofTechnology,Germany,3UniversityofErlangen-Nuernberg,Germany1Abstract……

Phasenoiseinmulti-gigahertzCMOSringoscillatorsPhaseNoiseinMulti-GigahertzCMOSRingOscillatorsAliHajimiri,SotiriosLimotyrakis,ThomasH.LeeCenterforIntegratedSystems,Stanford,CA94305-4070AbstractAnanalysisofthephasenoiseindifferentialandsingleendedringoscillatorsusingatime-variantmodelispresented.AnexpressionfortheRMSvalueoftheimpulsesensitivityfunction(ISF)isderived.Aclosed-formequationforphasenoiseofringoscillatorsiscalculatedandalowerlimitonthephasenoiseofringoscillatorsisshown.Phasenoisemeasurementsofoscillatorsrunningupto5.5GHzareingoodagreementwiththetheory.IntroductionDuetotheirintegratednature,ringoscillatorshaverecentlybecomeanimportantbuildingblockinmanydigitalandcommunicationsystems[13.Theycanalsobeusedfor……

IntegratedRFCMOSfrequencysynthesizersandoscillatorsforwirelessapplications¤¨§$"!$#%&D¨')(E10#203¤4¨#5678##!$#9¤@A@B¨!)8#%C!)@A¨#9#F$GG@7HI!)P¨QSRTRVUXW`Y`abYcQSd¨efBgIhpiqhsrutIhsvxwyr$fbgqtwTTyhprtA9thHWhsdTwgehphsruti7fgthgPhhjikgehjhlPhnmotgpfqTwykiersutuwrxthvgvTswtIhHRnmxTdky`YzhdTwyRtEwtIhg{hrTw|khpgIiewt}t~BtavhpahtEijRYzhld¨TwuRtEwtIhg{&rTw|uhjgIiIwttwkPwyieiqhjgetEwtwkrwtetIhjhkTE}Ehx7¨sjTE}E9n°z±yxTE}EEopq`oET¤5ExoE}§ahrTrTgI|uhsvt¨sjEf7oyEVTSssx}UMINumber:3119449Copyright2004byAktas,AdemAllrightsreserved.________________________________________________________UMIMicroform3119449Copyright2004ProQuestInformationandLearningCompany.Allrightsreserved.ThismicroformeditionisprotectedagainstunauthorizedcopyingunderTitle17,UnitedStatesCode.________________________……

HowPhaseNoiseAppearsinOscillatorsThischapterappearsinthebook"AnalogCircuitDesign-RFAnalog-toDigitalCon-verters;SensorandActuatorInterfaces;Low-NoiseOscillators,PLLsandSynthesizers",publishedbyKluwerAcademicPublishers,Boston,November1997,428pp.Hard-bound,ISBN0-7923-9968-4HowPhaseNoiseAppearsinOscillatorsAsadA.AbidiIntegratedCircuits&SystemsLaboratoryElectricalEngineeringDepartmentUniversityofCalifornia,LosAngelesabidi@icsl.ucla.eduhttp://www.icsl.ucla.edu/aagroupABSTRACTWirelesstransceiverscloselyspecifythephasenoiseinthelocaloscillator.Yetitisnotverywellunderstoodhowphasenoiseispredicted,especiallyinoscillatorswhichdonotuseapassiveresonator.Itisalsodifficulttomodelflickernoiseintheclose-inphasenoisespectrum.Thisis……

SelectingCrystalsForStableOscillatorsqiyan307@52RDSelectingCrystalsForStableOscillatorsUnderstandinghowquartz-crystalresonatorsoperatecanleadtodesigningcrystaloscillatorswithimprovedstabilityandbetternoiseperformance.OscillatorsarecriticalcomponentsinRFanddigitaldesigns.Althoughoscillatorcircuitrymayalreadybeprovidedaspartofanintegratedcircuit(IC),aproduct-designengineermaystillberequiredtoselectthecrystalresonatorandexternalcapacitors.Toachievefinalproductsuccess,itisimportantthatthedesignerhasabasicunderstandingofhowanoscillatorandcrystalfunctiontoselectthecorrectcrystalandexternalcapacitorsforthedevice.Poorcrystalselectioncanleadtoaproductthatdoesnotoperateproperly,failsprematurely,orwillnotoperateoverthein……