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ID:40058419
大小:520.06 KB
页数:13页
时间:2019-07-18
《Device Mismatch and Tradeoffs in the Design of Analog Circuits》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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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