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Device Mismatch and Tradeoffs in the Design of Analog Circuits

Device Mismatch and Tradeoffs in the Design of Analog Circuits

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时间：2019-07-18

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1、1212IEEEJOURNALOFSOLID-STATECIRCUITS,VOL.40,NO.6,JUNE2005DeviceMismatchandTradeoffsintheDesignofAnalogCircuitsPeterR.Kinget,SeniorMember,IEEEAbstract—Randomdevicemismatchplaysanimportantroleinfromthedesiredparametricyieldfortheoverallcircuitoptimalthedesignofaccurateanalogcircuits.Mode

2、lsforthematchingofaccuracyspecificationsarederivedwhichtogetherwiththere-MOSandbipolardevicesfromopenliteratureshowthatmatchingquiredbandwidthandlowpowerconsumptionareimportantimproveswithincreasingdevicearea.Asaresult,accuracyre-requirementsduringthedesign.InSectionIVwedemonstratequire

3、mentsimposeaminimaldeviceareaandthispaperexplorestheimpactofthisconstraintontheperformanceofgeneralanalogthat,sincetheaccuracyspecificationsimposeaminimaldevicecircuits.Itresultsinafixedbandwidth-accuracy-powertradeoffarea,theyfixthetradeoffbetweenpowerandbandwidthforwhichissetbytechnolog

4、yconstants.Thistradeoffisindependentbasicanalogbuildingblockssuchas,currentmirrors,invertingofbiaspointforbipolarcircuitswhereasforMOScircuitssomevoltageamplifiersandoperationaltransconductanceamplifiers.biaspointoptimizationsarepossible.Theperformancelimita-ForMOScircuitsthetradeoffcanb

5、eslightlyimprovedwiththetionsimposedbymatchingarecomparedtothelimitsimposedbythermalnoise.ForMOScircuitsthepowerconstraintsdueoptimizationofthebiaspointandtheoptimizationofvoltagetomatchingareseveralordersofmagnitudehigherthanforandcurrentsignalprocessingcircuitsisanalyzedindetail.How-

6、thermalnoise.Forthebipolarcasetheconstraintsduetonoiseever,thebandwidth-accuracy-powertradeoffislargelyfixedandandmatchingareofcomparableorderofmagnitude.Theimpactdeterminedbytechnologicalparameters.oftechnologyscalingontheconclusionsofthisworkarebrieflyThetradeoffrelationshipsderivedfor

7、thecircuitlevelarethenexplored.extendedtoevaluatethelimitationsofanalogsignalprocessingIndexTerms—BiCMOSanalogintegratedcircuits,bipolarinSectionV.Themismatchlimitsonpowerconsumptionareanalogintegratedcircuits,bipolartransistors,circuitanalysis,CMOSanalogintegratedcircuits,designmeth

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