電子信息工程專業(yè)英語教程（第6版）課件 Lesson 08 Clock Sources

Unit3ElectronicSystemComponentsLesson8ClockSources《電子信息工程專業(yè)英語教程（第6版）》任治剛編著電子工業(yè)出版社

3/6/20251《電子信息工程專業(yè)英語教程》Lesson8ClockSourcesBackgroundsTexttour

LanguageinuseVocabularyStructureReading/writingtechniques3/6/20252《電子信息工程專業(yè)英語教程》TerminologyOscillatorTCXO,PLL,VCODetectorBackgrounds3/6/20253《電子信息工程專業(yè)英語教程》Terminology

3/6/20254《電子信息工程專業(yè)英語教程》Oscillator振蕩器Resonant諧振的SeriesResonant串聯(lián)諧振ParallelResonant并聯(lián)諧振Resonatingfrequency諧振頻率Oscillator3/6/20255《電子信息工程專業(yè)英語教程》TCXO:TemperatureCompensatedCrystalOscillator

溫度補償晶體振蕩器PLL:PhaseLockedLoop

鎖相環(huán)VCO:VoltageControlledOscillator

壓控振蕩器TCXO,PLL,VCO3/6/20256《電子信息工程專業(yè)英語教程》detectorn.檢測器，檢波器，探測元件phasedetectorn.鑒相器,相位檢測器frequencydetectorn.鑒頻器,頻率檢測器Detector3/6/20257《電子信息工程專業(yè)英語教程》OutlineClockDevicesCrystals,CrystalOscillators,CompensatedOscillators,VoltageControlledOscillator,FrequencySynthesizers,ClockBuffersClockParametersClockJitter,Skew,Tolerance/Accuracy,Stability,Aging,Slew,DutyCycleTexttour3/6/20258《電子信息工程專業(yè)英語教程》Abasicpiezoelectricquartzcrystal

TwokindsofcrystalsSeriesResonantParallelResonantClockDevices

Crystals3/6/20259《電子信息工程專業(yè)英語教程》Anoscillatorwiththecrystalasthefeedbackelement

Providesthemostaccurateandstableoutputfrequency.Thepreferredclocksourceinmosthigh-speeddigitalsystemsrequiringclocks.ClockDevices

CrystalOscillators3/6/202510《電子信息工程專業(yè)英語教程》TrytoadjustthevariationinfrequencyduetotemperatureandvoltageTemperatureCompensatingOscillators(TCXO)

ClockDevices

CompensatedOscillators3/6/202511《電子信息工程專業(yè)英語教程》Theoutputof

VCOiscontrolledbyavoltagecontrolinputpin.

ClockDevices

VoltageControlledOscillator3/6/202512《電子信息工程專業(yè)英語教程》UseoneormorePLLtogenerateonetomanydifferentfrequenciesontheiroutputs,fromoneormorereferencesources.APLLhastwoinputsareferenceinputafeedbackinput.APLLcorrectsfrequencyintwowaysfrequencycorrectionPhasecorrectionClockDevices

FrequencySynthesizers3/6/202513《電子信息工程專業(yè)英語教程》BlockDiagramofaPhaseLockedLoopClockDevices

FrequencySynthesizers3/6/202514《電子信息工程專業(yè)英語教程》Adeviceinwhichtheoutputwaveformdirectlyfollowstheinputwaveform.HaveapropagationdelaySkewwillexistontheoutputs

ClockDevices

ClockBuffers3/6/202515《電子信息工程專業(yè)英語教程》VocabularyIncrement,propagation,deviation,transition,Intrinsic,extrinsic,nominalStructureReading/writingtechniquesLanguageinuse3/6/202516《電子信息工程專業(yè)英語教程》Vocabulary3/6/202517《電子信息工程專業(yè)英語教程》IncrementindictionaryTheprocessofincreasinginnumber,size,quantity,orextent.

增加Somethingaddedorgained:

增量Aslight,oftenbarelyperceptibleaugmentation.

微小增長Oneofaseriesofregularadditionsorcontributions:

累加Asmallpositiveornegativechangeinthevalueofavariable.

變量增量3/6/202518《電子信息工程專業(yè)英語教程》IncrementintextTheResolutionwilldetermineinwhatsizeincrementsthefrequencycanchange.精度決定了頻率改變的增量。

3/6/202519《電子信息工程專業(yè)英語教程》Incrementinuseangleincrement角增量annualincrement年增量averageincrement平均增量frequencyincrement頻率增量logarithmicincrement對數(shù)增量3/6/202520《電子信息工程專業(yè)英語教程》PropagationindictionaryMultiplicationorincrease,asbynaturalreproduction.

繁殖Theprocessofspreadingtoalargerareaorgreaternumber;dissemination.

蔓延；散發(fā)Theactorprocessofpropagating,especiallytheprocessbywhichadisturbance,suchasthemotionofelectromagneticorsoundwaves,istransmittedthroughamediumsuchasairorwater.

傳播3/6/202521《電子信息工程專業(yè)英語教程》PropagationintextAClockBufferisadeviceinwhichtheoutputwaveformdirectlyfollowstheinputwaveform.Theinputwaveformpropagatesthroughthedeviceandisredrivenbytheoutputbuffers.Hence,suchdeviceshaveapropagationdelayassociatedwiththem.Inaddition,duetothedifferencesbetweenthepropagationdelaythroughthedeviceoneachinput-outputpath,skewwillexistontheoutputs.時鐘緩沖器是一種輸出波形直接跟隨輸入波形的器件。輸入波形通過該器件并被輸出緩沖器重新驅(qū)動。因此，該類器件存在傳播延遲。此外，由于在每個輸入-輸出通道間存在傳播延遲的差別，輸出端將出現(xiàn)相位抖動。3/6/202522《電子信息工程專業(yè)英語教程》Propagationinusebeyond-the-horizonpropagation超越地平線傳播,超視距傳播carrypropagation進位傳送earth-layerpropagation地層傳播errorpropagation誤差傳播forward-scatterpropagation前向散射傳播freespacepropagation自由空間傳播3/6/202523《電子信息工程專業(yè)英語教程》Propagationinusegroundwavepropagation地波傳播high-frequencypropagation高頻傳播microwavepropagation微波傳播multipathpropagation多徑傳播radiopropagation無線電波傳播ultrasonicpropagation超聲波傳播3/6/202524《電子信息工程專業(yè)英語教程》DeviationindictionaryTheactofdeviatingorturningaside.

背離，偏離Anabnormality;adeparture:

反常；偏移：Deviantbehaviororattitudes.

不正常的行為或態(tài)度Thedifference,especiallytheabsolutedifference,betweenonenumberinasetandthemeanoftheset.

偏差3/6/202525《電子信息工程專業(yè)英語教程》DeviationintextJittercanbedefinedasthedeviationsinaclock’soutputtransitionsfromtheiridealpositions.Thedeviationcaneitherbeleadingorlaggingtheidealposition.抖動被定義為時鐘輸出的狀態(tài)轉(zhuǎn)換位置偏離了理想位置。這種偏離可能超前于理想位置，也可能滯后于理想位置。

3/6/202526《電子信息工程專業(yè)英語教程》absolutedeviation絕對差randomdeviation隨機偏差secondorderdeviation二階方差systemdeviation系統(tǒng)偏差Deviationinuse3/6/202527《電子信息工程專業(yè)英語教程》Deviationinuse

deviationaberrationdivergence

Thecentralmeaningsharedbythesenounsisthedeparturefromwhatisprescribedorexpected.toleratesnodeviationfromtherules;regrettedtheaberrationsofherearlylife;thedivergenceoftwocultures.3/6/202528《電子信息工程專業(yè)英語教程》TransitionindictionaryTheswitchingfromonestate(e.g.,positivevoltage)toanother(negative)inaserialtransmission.Achangefromonesignificantconditiontoanotherinatelegraphoradatasignal.3/6/202529《電子信息工程專業(yè)英語教程》TransitionintextPeriodjitter,alsocalledshort-termjitter,isachangeinaclock’soutputtransitionfromitsidealpositionoverconsecutiveclockedges.周期內(nèi)抖動也稱為短期抖動。它是指在相繼時鐘邊沿的范圍內(nèi)時鐘輸出狀態(tài)轉(zhuǎn)換位置偏離理想位置。

3/6/202530《電子信息工程專業(yè)英語教程》Transitioninuseblack-to-whitetransition黑白過渡coaxial-to-waveguidetransition同軸線-波導管過渡environmentaltransition環(huán)境變遷flip-floptransition觸發(fā)器狀態(tài)轉(zhuǎn)換3/6/202531《電子信息工程專業(yè)英語教程》Intrinsic,extrinsicindictionaryIntrinsic：

Oforrelatingtotheessentialnatureofathing;inherent.

本質(zhì)的；固有的Theintrinsicvalueofacoinisthevalueofthemetalitismadeof.Extrinsic：Notforminganessentialorinherentpartofathing;extraneous.

非本質(zhì)的，無關(guān)系的

That'ssomethingextrinsictothesubject.Originatingfromtheoutside;external.

外來的；外部的3/6/202532《電子信息工程專業(yè)英語教程》Intrinsic,extrinsicintextClockDriverSkew(IntrinsicSkew)istheamountofskewcausedbytheclockdriveritself.時鐘驅(qū)動器相位偏移（內(nèi)部相位偏移）是由時鐘驅(qū)動器引起的相位偏移量。

BoardDesignSkew(Extrinsicskew)istheamountofskewcausedbyboardlayoutissuessuchas:電路板設(shè)計相位偏移（外部相位偏移）是由下列電路板布線問題造成的相位偏移量：3/6/202533《電子信息工程專業(yè)英語教程》NominalindictionaryAssignedtoorbearingaperson'sname提名的，記名的Existinginnameonly名義上的Insignificantlysmall;trifling微不足道的Of,relatingto,orbeingtheamountorfacevalueofasumofmoneyorastockcertifica