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Unit3ElectronicSystemComponentsLesson8ClockSources《电子信息工程专业英语教程》任治刚主编电子工业出版社7/24/202411/45
Lesson8ClockSourcesBackgroundsTexttourLanguageinuseVocabularyStructureReading/writingtechniques7/24/202422/45
TerminologyOscillatorTCXO,PLL,VCODetectorBackgrounds7/24/202433/45
Terminology7/24/202444/45
Oscillator振荡器Resonant谐振SeriesResonant串联谐振ParallelResonant并联谐振Resonatingfrequency谐振频率Oscillator7/24/202455/45
TCXO:TemperatureCompensatedCrystalOscillator 温度赔偿晶体振荡器PLL:PhaseLockedLoop 锁相环VCO:VoltageControlledOscillator 压控振荡器TCXO,PLL,VCO7/24/202466/45
detectorn.检测器,检波器,探测元件phasedetectorn.鉴相器,相位检测器frequencydetectorn.鉴频器,频率检测器Detector7/24/202477/45
OutlineClockDevicesCrystals,CrystalOscillators,CompensatedOscillators,VoltageControlledOscillator,FrequencySynthesizers,ClockBuffersClockParametersClockJitter,Skew,Tolerance/Accuracy,Stability,Aging,Slew,DutyCycleTexttour7/24/202488/45
AbasicpiezoelectricquartzcrystalTwokindsofcrystalsSeriesResonantParallelResonantClockDevices
Crystals7/24/202499/45
AnoscillatorwiththecrystalasthefeedbackelementProvidesthemostaccurateandstableoutputfrequency.Thepreferredclocksourceinmosthigh-speeddigitalsystemsrequiringclocks.ClockDevices
CrystalOscillators7/2445
TrytoadjustthevariationinfrequencyduetotemperatureandvoltageTemperatureCompensatingOscillators(TCXO)ClockDevices
CompensatedOscillators7/2445
TheoutputofVCOiscontrolledbyavoltagecontrolinputpin.ClockDevices
VoltageControlledOscillator7/2445
UseoneormorePLLtogenerateonetomanydifferentfrequenciesontheiroutputs,fromoneormorereferencesources.APLLhastwoinputsareferenceinputafeedbackinput.APLLcorrectsfrequencyintwowaysfrequencycorrectionPhasecorrectionClockDevices
FrequencySynthesizers7/2445
Figure3.4.BlockDiagramofaPhaseLockedLo
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