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ADI’s Medical Ultrasound Solutions.pdf

ADI’s Medical Ultrasound Soluti…

weijianxi2
2012-09-26 0人阅读 0 0 0 暂无简介 举报

简介:本文档为《ADI’s Medical Ultrasound Solutionspdf》,可适用于地理考古领域

wwwanalogcomADI’sMedicalUltrasoundSolutionsMedicalUltrasoundSystemTheoryandTypicalArchitectureBytransmittingacousticenergyintothebodyandreceivingandprocessingthereturningreflections,ultrasoundsystemscangenerateimagesofinternalorgansandstructures,mapbloodflowandtissuemotion,andprovidehighlyaccuratebloodvelocityinformationUltrasoundsystemsincludetransducers,highvoltagemultiplexing,highvoltagetransmitters,TxRxswitches,receivepathAnalogFrontEnd(AFE),beamformers,beamformeddigitalsignalprocessing,displayprocessingandperipheralsTheAFEincludesalownoiseamplifier(LNA)avariablegainamplifier(VGA)anantialiasingfilter(AAF)andananalogtodigitalconverter(ADC)TherearetwokindsofbeamformersdigitalbeamformersandanalogbeamformersfordifferentapplicationsMedicalUltrasoundSystemDesignConsiderationsandMajorChallenges•AFECircuitPerformance,suchas:noiseperformance,SNR(SignaltoNoiseRatio),andDR(DynamicRange)TypicalrequiredDRis:dBforBmode,dBforPWD(PulseWaveDoppler)anddBforCWD(ContinuousWaveDoppler)•TransmitVoltageHightransmitvoltagesareneededtoimprovesignalpenetrationandalsoforharmonicimagingTheacousticpowergrowsasthetransmitvoltageisincreased,butitislimitedbysafetyrequirementsfromagenciessuchastheFDA•BeamFormerComplexityHighimagequalityrequiresalargenumberofbeamformingchannelsTheincreasedcomplexityinturnleadstohigherpowerdissipationandrequiresmoreimagingvolumetoimplement•HeatDissipationHeatdissipationisanimportantissueforminiaturizeddevices,particularlywhenimprovingimagequalityisthegoalHistorically,thelargenumberofhighperformancetransmittersandreceiversrequiredtoimplementtheseimagingsystemsresultedinlargeandexpensivecartbasedimplementationsRecently,advancesinintegrationhaveallowedsystemengineerstodesignsmaller,lowercost,andmoreportableimagingsolutionswithperformanceequaltocartbasedsystemsTotalsolutionsfromADIADIprovidesanextensiveselectionofamplifiers,dataconversion,signalprocessingandpowermanagementsolutionsthatmaximizeimagequality,andreducepowerconsumptionandcostincartbasedandbatterypoweredportableultrasoundequipmentInaddition,ADIprovidesevaluationboards,gerberfiles,simulationtoolsandapplicationsexpertisetosupportcustomerdesignanddevelopmenteffortsPowerManagementSolutionMainSignalChain:●DigitalPotentiometer●Interface●References●SignalControl●Supervisory●ThermalManagementOtherKeyComponentsLNAVGAHVAMPDACTransducerArrayTRSwitchesIsolationBeamformerCentralControlProcessorFPGADigitalRxBeamformerADIIntegratedSolutionADCADCADCAmpAmpCWDopplerProcessingVideoDACVideoEncoderVideoCompressionAudioDACLNAVGAADCArray(UptoChannels)AAFClocksIQProcessingAmpAmpFilterDVRADADADADADADADVADxxADCLKADAUSSMADSPADVADVxADAADAasIVADAADAasFilterADAADAasADCDriverADSwitchControlADGADGADuMxADADAADVADVADGainControlDACVideoDecoderHDMIreceiverADAADADxxADADAADAHVMuxandTRSwitchesImageandMotionProcessing(BMode)ColorDopplerProcessing(FMode)wwwanalogcomIntegratedAFESolutionsADI’sADxIntegratedAnalogFrontEnd(AFE)seriesprovidemoreoptionstoaddressultrasoundsystemdesignchallengesCustomerscanselectanAFEtobestmatchRXrequirementsforperformance,powerconsumption,andimagingmodeMoreHealthcareApplicationsandProductsinformation,pleasevisit:http:healthcareanalogcomenimagingultrasoundsegmenthealthhtmlSampleApplications,pleasevisit:http:wwwanalogcomsampleAnalogFrontEnd(AFE)•ADevaluationboardwithschematicandPCBlayoutGerberfile•HighSpeedFPGABasedDataCaptureBoard(HSCADCEVALCZ)•VisualAnalog™software•AFESPIInterfaceSoftware(SPIController)•ADxConfigurationTool•ADIsimADCModelingTool•ADBGAPCBLayoutGerberfiles•ADevaluationboardwithschematicandPCBlayoutGerberfile•ADevaluationboardwithschematicandPCBlayoutGerberfileClocking•ADIsimCLKModelingTool•ADxxevaluationsoftwareandboardPowerManagement•ADIsimPower•EvaluationboardDSP•Evaluationboard,emulationtoolsWhatADICanProvidetoCustomersOtherRelatedProductsCustomerInteractionCentercicasiaanalogcomEngineerZonehttp:ezanalogcomindexjspaPartDescriptionADDCtoMHz,QuadIQDemodulatorandPhaseShifterphaseselectoneachoutput(°perstep)ADUltralowNoiseVGAswithPreamplifierandProgrammableRINVoltagenoise=nV√HzCurrentnoise=pA√HzADMsps,LSB(ppm),dBDR,mWpinpincompatiblewithbitsandhighersamplingrateversion,AD,etcADLVDSCMOSOutputwithIntegratedGHzVCOOnchipVCOtunes~GHzexternalVCOVCXOtoGHzdifferentialorsingleAcceptsMHztoMHzcrystalADPDualchannelprovidescompactsolutionsizeOptimizedgatedrivingcircuitryprovideslowsystemnoiseandeasypowersequencecontrolADPHighefficiencyduetoexternallowsideMOSFETsDualchannelprovidescompactsolutionsizeParallelconfigurationprovideshigheroutputcurrentcapacityuptoADSPADI’sBlackfinseriesDSPprovideswideoptionsfordigitalsignalprocessingParameterUnitADADADADADADADCresolutionbitInputVoltage(dBcompression)mVppLNAGaindBLNAInputNoiseVoltagenV√HzTGCInputNoiseVoltageMaxVGAgain,Rs=nV√HzInputNoiseCurrentpA√HzPowerTGCMHzmWchPowerTGCMHzmWchMHzMHzPowerCWmWchTGCOutputDRmidchannelgaindBTGCOutputSNRdBFSoutputdBVGAGainRangedBAAFLowPassCutoffMHz~~~~~~SamplingRate(Max)MSPS()()()()()()CWInputDRdBFS√HzCWInputNoiseVoltage(includingoutputamplifiers)nV√HzCWLOInterfacexLOxLOxLOxLOxLOxLOCWOutputCompatiblewithADCompatiblewithADCurrentCurrentCurrentCurrentPackagemmxmmTQFPmmxmmTQFPmmxmmBGAmmxmmTQFPmmxmmTQFPmmxmmBGAmmxmmBGASupplyVoltageVOperatingTemperatureV−°Cto°C−°Cto°C−°Cto°C−°Cto°C−°Cto°C−°Cto°C

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