電子信息工程專業(yè)英語教程（第5版） 課件 Lesson 08 Clock Sources

Unit3ElectronicSystemComponentsLesson8ClockSources《電子信息工程專業(yè)英語教程（第5版）》Lesson8ClockSourcesBackgroundsTexttour

LanguageinuseVocabularyStructureReading/writingtechniques2024/5/29《電子信息工程專業(yè)英語教程》2TerminologyOscillatorTCXO,PLL,VCODetectorBackgrounds2024/5/29《電子信息工程專業(yè)英語教程》3Terminology

2024/5/29《電子信息工程專業(yè)英語教程》4Oscillator振蕩器Resonant諧振的SeriesResonant串聯(lián)諧振ParallelResonant并聯(lián)諧振Resonatingfrequency諧振頻率Oscillator2024/5/29《電子信息工程專業(yè)英語教程》5TCXO:TemperatureCompensatedCrystalOscillator

溫度補(bǔ)償晶體振蕩器PLL:PhaseLockedLoop

鎖相環(huán)VCO:VoltageControlledOscillator

壓控振蕩器TCXO,PLL,VCO2024/5/29《電子信息工程專業(yè)英語教程》6detectorn.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Detector2024/5/29《電子信息工程專業(yè)英語教程》7OutlineClockDevicesCrystals,CrystalOscillators,CompensatedOscillators,VoltageControlledOscillator,FrequencySynthesizers,ClockBuffersClockParametersClockJitter,Skew,Tolerance/Accuracy,Stability,Aging,Slew,DutyCycleTexttour2024/5/29《電子信息工程專業(yè)英語教程》8Abasicpiezoelectricquartzcrystal

TwokindsofcrystalsSeriesResonantParallelResonantClockDevices

Crystals2024/5/29《電子信息工程專業(yè)英語教程》9Anoscillatorwiththecrystalasthefeedbackelement

Providesthemostaccurateandstableoutputfrequency.Thepreferredclocksourceinmosthigh-speeddigitalsystemsrequiringclocks.ClockDevices

CrystalOscillators2024/5/29《電子信息工程專業(yè)英語教程》10TrytoadjustthevariationinfrequencyduetotemperatureandvoltageTemperatureCompensatingOscillators(TCXO)

ClockDevices

CompensatedOscillators2024/5/29《電子信息工程專業(yè)英語教程》11Theoutputof

VCOiscontrolledbyavoltagecontrolinputpin.

ClockDevices

VoltageControlledOscillator2024/5/29《電子信息工程專業(yè)英語教程》12UseoneormorePLLtogenerateonetomanydifferentfrequenciesontheiroutputs,fromoneormorereferencesources.APLLhastwoinputsareferenceinputafeedbackinput.APLLcorrectsfrequencyintwowaysfrequencycorrectionPhasecorrectionClockDevices

FrequencySynthesizers2024/5/29《電子信息工程專業(yè)英語教程》13BlockDiagramofaPhaseLockedLoopClockDevices

FrequencySynthesizers2024/5/29《電子信息工程專業(yè)英語教程》14Adeviceinwhichtheoutputwaveformdirectlyfollowstheinputwaveform.HaveapropagationdelaySkewwillexistontheoutputs

ClockDevices

ClockBuffers2024/5/29《電子信息工程專業(yè)英語教程》15VocabularyIncrement,propagation,deviation,transition,Intrinsic,extrinsic,nominalStructureReading/writingtechniquesLanguageinuse2024/5/29《電子信息工程專業(yè)英語教程》16Vocabulary2024/5/29《電子信息工程專業(yè)英語教程》17IncrementindictionaryTheprocessofincreasinginnumber,size,quantity,orextent.

增加Somethingaddedorgained:

增量Aslight,oftenbarelyperceptibleaugmentation.

微小增長Oneofaseriesofregularadditionsorcontributions:

累加Asmallpositiveornegativechangeinthevalueofavariable.

變量增量2024/5/29《電子信息工程專業(yè)英語教程》18IncrementintextTheResolutionwilldetermineinwhatsizeincrementsthefrequencycanchange.精度決定了頻率改變的增量。

2024/5/29《電子信息工程專業(yè)英語教程》19Incrementinuseangleincrement角增量annualincrement年增量averageincrement平均增量frequencyincrement頻率增量logarithmicincrement對(duì)數(shù)增量2024/5/29《電子信息工程專業(yè)英語教程》20PropagationindictionaryMultiplicationorincrease,asbynaturalreproduction.

繁殖Theprocessofspreadingtoalargerareaorgreaternumber;dissemination.

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

傳播2024/5/29《電子信息工程專業(yè)英語教程》21PropagationintextAClockBufferisadeviceinwhichtheoutputwaveformdirectlyfollowstheinputwaveform.Theinputwaveformpropagatesthroughthedeviceandisredrivenbytheoutputbuffers.Hence,suchdeviceshaveapropagationdelayassociatedwiththem.Inaddition,duetothedifferencesbetweenthepropagationdelaythroughthedeviceoneachinput-outputpath,skewwillexistontheoutputs.時(shí)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(dòng)。因此，該類器件存在傳播延遲。此外，由于在每個(gè)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(dòng)。2024/5/29《電子信息工程專業(yè)英語教程》22Propagationinusebeyond-the-horizonpropagation超越地平線傳播,超視距傳播carrypropagation進(jìn)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2024/5/29《電子信息工程專業(yè)英語教程》23Propagationinusegroundwavepropagation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2024/5/29《電子信息工程專業(yè)英語教程》24DeviationindictionaryTheactofdeviatingorturningaside.

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2024/5/29《電子信息工程專業(yè)英語教程》25DeviationintextJittercanbedefinedasthedeviationsinaclock’soutputtransitionsfromtheiridealpositions.Thedeviationcaneitherbeleadingorlaggingtheidealposition.抖動(dòng)被定義為時(shí)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。

2024/5/29《電子信息工程專業(yè)英語教程》26absolutedeviation絕對(duì)差randomdeviation隨機(jī)偏差secondorderdeviation二階方差systemdeviation系統(tǒng)偏差Deviationinuse2024/5/29《電子信息工程專業(yè)英語教程》27Deviationinuse

deviationaberrationdivergence

Thecentralmeaningsharedbythesenounsisthedeparturefromwhatisprescribedorexpected.toleratesnodeviationfromtherules;regrettedtheaberrationsofherearlylife;thedivergenceoftwocultures.2024/5/29《電子信息工程專業(yè)英語教程》28TransitionindictionaryTheswitchingfromonestate(e.g.,positivevoltage)toanother(negative)inaserialtransmission.Achangefromonesignificantconditiontoanotherinatelegraphoradatasignal.2024/5/29《電子信息工程專業(yè)英語教程》29TransitionintextPeriodjitter,alsocalledshort-termjitter,isachangeinaclock’soutputtransitionfromitsidealpositionoverconsecutiveclockedges.周期內(nèi)抖動(dòng)也稱為短期抖動(dòng)。它是指在相繼時(shí)鐘邊沿的范圍內(nèi)時(shí)鐘輸出狀態(tài)轉(zhuǎn)換位置偏離理想位置。

2024/5/29《電子信息工程專業(yè)英語教程》30Transitioninuseblack-to-whitetransition黑白過渡coaxial-to-waveguidetransition同軸線-波導(dǎo)管過渡environmentaltransition環(huán)境變遷flip-floptransition觸發(fā)器狀態(tài)轉(zhuǎn)換2024/5/29《電子信息工程專業(yè)英語教程》31Intrinsic,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2024/5/29《電子信息工程專業(yè)英語教程》32Intrinsic,extrinsicintextClockDriverSkew(IntrinsicSkew)istheamountofskewcausedbytheclockdriveritself.時(shí)鐘驅(qū)動(dòng)器相位偏移（內(nèi)部相位偏移）是由時(shí)鐘驅(qū)動(dòng)器引起的相位偏移量。

BoardDesignSkew(Extrinsicskew)istheamountofskewcausedbyboardlayoutissuessuchas:電路板設(shè)計(jì)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：2024/5/29《電子信息工程專業(yè)英語教程》33NominalindictionaryAssignedtoorbearingaperson'sname提名的，記名的Existinginnameonly名義上的Insignificantlysmall;trifling微不足道的Of,relatingto,orbeingtheamountorfacevalueofasumofmoneyorastockcertificate,fo