2009 - A 128-channel 6 mW wireless neural recording IC with spike feature extraction and UWB transmitter

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1、312IEEETRANSACTIONSONNEURALSYSTEMSANDREHABILITATIONENGINEERING,VOL.17,NO.4,AUGUST2009A128-Channel6mWWirelessNeuralRecordingICWithSpikeFeatureExtractionandUWBTransmitterMooSungChae,ZhiYang,MehmetR.Yuce,LinhHoang,andWentaiLiu,SeniorMember,IEEEAbstract—Thispaperreportsa128-channelneuralrecordingFi

2、rst,itshouldbeabletorecordalargenumberofchannelssi-integratedcircuit(IC)withon-the-flyspikefeatureextractionandmultaneously;andhighdensityrecordingcanadvancefunda-wirelesstelemetry.Thechipconsistsofeight16-channelfront-endmentalneurosciencestudiesandhasthepotentialtoimproverecordingblocks,spiked

3、etectionandfeatureextractiondigitalsignalprocessor(DSP),ultrawideband(UWB)transmitter,andtheperformanceofneuralprostheticdevices.Second,awire-on-chipbiasgenerators.Eachrecordingchannelhasamplifierslesstelemetrythattransmitsrecordedneuraldataispreferable,withprogrammablegainandbandwidthtoaccommod

4、atedif-becausetetheringwiresimposesignificantrestrictionsontheferenttypesofbiologicalsignals.Ananalog-to-digitalconvertersubjectsandinhibitfreemovementintheirnaturalenvironment.(ADC)sharedby16amplifiersthroughtime-multiplexingresultsinabalancedtrade-offbetweenthepowerconsumptionandchipThird,on-th

5、e-flyprocessingofneuraldataisnecessarytoenablearea.Anonlinearenergyoperator(NEO)basedspikedetectorisprostheticdevicesfunctioninginareal-time.Inaddition,afastimplementedforidentifyingspikes,whicharefurtherprocessedprocessingcapabilityremovesthenecessityofstoringthelargebyadigitalfrequency-shaping

6、filter.Thecomputationallyeffi-amountofrawdata.Fourth,thespecificationsoftherecordingcientspikedetectionandfeatureextractionalgorithmsattributesystemshouldbedesignedwithprogrammabilityandversatilitytoanauspiciousDSPimplementationon-chip.UWBtelemetryisdesignedtowirelesslytransferrawdatafrom128record

7、ingthataccommodateawiderangeofbio-potentialsindifferentap-channelsatadatarateof90Mbit/s.Thechipisrealizedin0.35plications.Finally,powerconsumptionandchipareahavetobecomplementarymetal–oxide–semiconductor(CMOS)processoptimizedduet