标签: schreier

RichardSchreier的Delta-Sigma在MIT的讲义MITOPENCOURSEWAREMASSACUSETTSINSTITUTEOFTECHNOLOGY6.976High-SpeedCommunicationCircuitsandSystemsLecture29LowpassandBandpassDelta-SigmaModulationRichardSchreierANALOGDEVICESCopyright2003RichardSchreier1Outline1ΣBasics1st-OrderModulator2AdvancedΣHigh-OrderΣModulatorsMulti-bitandMulti-StageModulation3BandpassΣModulation4ExampleBandpassADC21.ΣBasics3CTMOD1:A1-OrderContinuous-TimeΣModulatorTheinputsignal,U,isconvertedintoasequenceofbits,V∈(0,1).CRUYCK0,IVst4PropertiesofCTMOD1DCInputsIntegratorensuresthatinputcurrentisexactlybalancedbythe(average)feedbackcurrent“Inniteresolution”SignalswhichaliastoDCarerejected“Inherentanti-aliasing”5Non-idealEffectsinCTMO……