摘要摘要近年来随着IC设计要求的不断发展，集成电路版图设计是实现集成电路制造所必不可少的设计环节，它不仅关系到集成电路的功能是否正确，而且也会极大程度地影响集成电路的性能、成本。而集成电路中的bandgap可以在温度和电压不稳定的环境中保持稳定的参考电压，被广泛运用于比较器、A/D转换器等模拟电路及数模混合信号集成电路中，其性能直接影响整个系统的精度和性能。因此，bandgap版图设计的研究非常有意义。本文基于Cadence版图设计软件平台，采用XFAB0.6µmCMOS工艺设计。设计的版图元件包括PMOS、NMOS、PNP三极管、电阻、电容。其中对差分放大器、电流镜、电阻等重要元件采用了匹配和对称的设计方法，考虑电气特性的版图设计技术；为防止闩锁效应，本设计还运用了保护环保护整个电路，提高了bandgap电路的可靠性。本设计对最终设计出的版图使用calibre验证工具进行LVS和DRC验证，并顺利通过验证。关键字：版图；带隙基准电压源；Cadence；匹配；验证IAbstractABSTRACTInrecentyears,alongwithICdesignrequestofcontinuouslydevelopment,IClayoutareessentialtoachievethedesignofintegratedcircuitmanufacturingsectors,itisnotonlyrelatedtotheIC'sfunctionsarecorrect,butalsogreatextentaffectICperformanceandcost.Butbandgapreferencevoltageofintegratedcircuitcankeepstabilityintheunsteadyenvironmentofthetemperatureandtheelectricvoltageofreferenceelectricvoltage,usedextensivelyincomparisonmachine,A/Dconversionmachineetc.analogelectriccircuitandsomemixturesignalintegratedcircuit.Itsfunctionisdirectlyinfluencethewholeaccuracyandfunctionofsystem.Therefore,theresearchwhichtakethelayoutdesignofthebandgapreferencevoltageisverymeaningful.Thistext,accordingtothedesignsoftwareoftheCadenceaboutlayoutdesign,adoptsXFAB0.6µmCMOSofdesignrule.ThecomponentoflayoutdesignincludePMOS,NMOS,PNP,electricresistance,electriccapacity.TotheOP、currentandresistancewhichareimportancecomponentsadoptlayoutdesigntechniqueofconsiderationelectricitycharacteristic;Toreducelatch-up,thisdesignstillusesguardringtoprotectthewholeelectriccircuit,improvingthecredibilityofbandgapreferencevoltage.Intheend,thisdesigncarriedLVSandDRCofverificationtothelandscapeusedcalibreverificationtoolthatfinallydesignsandpassedaverificationsmoothly.KeyWords:Layout;Bandgapreferencevoltage;Cadence;matching;SymmetryII目录目录第1章引言...............................................11.1选题背景及意义........................................11.2国内微电子发展状况...................................1第2章Bandgap简介..........................................32.1什么是Bandgap.............................................32.2Bandgap的原理..........................................42.3Bandgap的应用..........................................6第3章Virtuoso工具及版图绘制...........................83.1Cadence软件介绍........................................83.2Virtuoso工具的使用.....................................103.2.1建立版图库.............................................103.2.2层选择窗的设置........................................133.2.3版图编辑窗的设置.....................................143.2.4Virtuoso的常用快捷键................................16第4章Bandgap的版图设计................................174.1版图设计中的相关主题................................174.1.1器件的匹配规则.....................................174.1.2匹配管子的版图设计................................224.1.3电阻版图设计........................................254.1.4倒比管版图设计.....................................264.1.5双极型晶体管版图设计..............
