标签: multirate

MultirateAdaptiveCompensationofUncertainResonancesBeyondtheNyquistFrequency

Capabilitiesandlimitationsofmultiratecontrolschemes(ShankarP.Bhattacharyya)

ThisarticledescribesthreeoptionsforinterfacingtheDS1859DigitallyControlledResistorstotheMAX3735LaserDriver.Includedisanewtechniqueusinganopampthatgivesalineartransferfunction.Itcanbeadjustedforanyarbitrarycurrentrange.ItcanevengeneratecurrentslargerthanthoseflowingintheDS1859potentiometeratminimumresistance.Thesetechniquescanbeappliedtootherpartsaswell.……

Mostofthesignalsdirectlyencounteredinscienceandengineeringarecontinuous:lightintensitythatchangeswithdistance;voltagethatvariesovertime;achemicalreactionratethatdependsontemperature,etc.Analog-to-DigitalConversion(ADC)andDigital-to-AnalogConversion(DAC)aretheprocessesthatallowdigitalcomputerstointeractwiththeseeverydaysignals.Digitalinformationisdifferentfromitscontinuouscounterpartintwoimportantrespects:itissampled,anditisquantized.Bothoftheserestricthowmuchinformationadigitalsignalcancontain.Thischapterisaboutinformationmanagement:understandingwhatinformationyouneedtoretain,andwhatinformationyoucanaffordtolose.Inturn,thisdictatestheselectionofthesamplingfrequency,numberofbits,andtypeofanalogfilteringneededforconvertingbetweentheanaloganddigitalrealms.CHAPTERADCandDAC3Mostofthesignalsdirectlyencounteredinscienceandengineeringarecontinuous:lightintensitythatchangeswithdistance;voltagethatvariesovertime;achemicalreactionratethatdependsontemperature,etc.Analog-to-DigitalConversion(ADC)andDigital-to-AnalogConversion(DAC)aretheprocessesthatallowdigitalcomputerstointeractwiththeseeverydaysignals.Digitalinformationisdifferentfromitscontinuouscounterpartintwoimportantrespects:itissampled,anditisquantized.Bothoftheserestricthowmuchinformationadigitalsignalcancontain.Thischapterisaboutinformationmanagement:understandingwhatinformationyouneedtoretain,andwhatinformationyoucanaffordtolose.In……

SamplingandMultirateTechniquesforComplexandBandpassSignalsTAMPEREUNIVERSITYOFTECHNOLOGY/TelecommunicationsIQ/1M.Renfors22.09.04SamplingandMultirateTechniquesforComplexandBandpassSignalsMarkkuRenforsInstituteofCommunicationsEngineeringTampereUniversityofTechnology,Finlandmarkku.renfors@tut.fiwww.cs.tut.fi/tltTopics:ComplexsignalsandsystemsSamplingofcomplexsignalsFrequencytranslationsusingmixingandmultirateoperationsRealandI/QsamplingofbandpasssignalsNonidealitiesinsamplingandA/D-conversionDelta-sigmaconversionprincipleTAMPEREUNIVERSITYOFTECHNOLOGY/TelecommunicationsIQ/2M.Renfors……

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