光通信接收模块前端跨阻放大器的设计

中南大学本科生毕业论文目录１机电工程学院中南大学本科生毕业论文（设计）题目155Mbps光通信接收模块前端跨阻放大器的设计学生姓名指导教师学院机电工程学院专业班级微电子0801完成时间2012年6月8日中南大学本科生毕业论文目录２目录摘要.........................................................................................................................IABSTRACT...............................................................................................................II第1章绪论.......................................................................................................11.1光纤通信技术简介.....................................................................................11.2课题研究背景及意义.................................................................................31.3主要研究内容及章节安排........................................................................4第2章跨阻放大器原理及性能分析.................................................................５2.1跨阻放大器工作原理...............................................................................５2.2TIA性能指标的定义及分析....................................................................６2.2.1带宽..................................................................................................６2.2.2噪声.................................................................................................６2.2.3跨阻增益.........................................................................................７2.2.4输出阻抗........................................................................................７2.2.5商用跨阻芯片性能对比................................................................７2.3跨阻放大器的种类....................................................................................８2.4本章小结.....................................................................................................８第3章跨阻放大器电路设计..............................................................................９3.1模拟集成电路设计简介...........................................................................９3.1.1CMOS技术介绍................................................................................９3.1.2SPICE仿真简介.........................................................................１０3.1.3晶体管模型...............................................................................１０3.2核心级跨阻放大电路设计.................................................................１１3.2.1RGC结构原理及设计..............................................................１１3.2.2负反馈形式的反相放大器原理及设计.................................１３3.2.3核心跨阻放大电路整体分析..................................................１５3.3单端转差分电路结构..........................................................................１６3.4后续放大及缓冲结构..........................................................................１８3.5仿真结果分析......................................................................................１９3.6本章小结...............................................................................................２１第4章总结................................................................................................２２4.1全文总结...............................................................................................２２4.2研究展望...............................................................................................２２参考文献..............................................................................................................２６致谢..................................................................................................................２７中南大学本科生毕业论文目录３附录A............................................................................................................２８A.1PSPICE仿真源程序(包括电路网表和MOS管模型）...........２８A.2跨阻放大器电路图...........................................................................３４中南大学本科生毕业论文摘要I摘要近年来，光纤通信技术得到了长足的发展，光纤通信已经成为现代通信网的主要传输手段。随着信息交换和传输量爆炸式地增长，对高速光接收机和光发送机的需求日益增加。跨阻放大器作为光接收机前端最关键的结构，其性能在很大程度上决定了整个光接收机的性能，因此性能优良的跨阻放大器的设计与实现具有很重要的工程应用意义。本论文的主要内容是设计应用于同步数字体系（SDH）STM-1速率级（155Mbps）的跨阻放大器。前置跨阻放大器的作用是将光电二极管微弱的输出电流放大到合适的电压范围，其设计需要综合考虑增益、带宽、噪声、灵敏度、电压余度等性能，进行合理的折中。本设计采用的基本电路包括RGC结构、带负反馈的反相放大器、单端转差分结构、后续差分放大器和输出缓冲器等，使用TSMC（台积电）公司0.35um工艺进行设计，同时借助Pspice软件进行仿真分析。仿真结果表明，在5V的工作电压下，设计出的跨阻放大器的中频带差分增益为15KΩ，-3dB带宽频率为1.306GHz，电路总功耗为17.8mW，达到了设计目标。其中带宽远远超过了原设计目标，完全可以满足同步光网络（SONET）STS-24系列1.25Gbps速率下的带宽要求。关键字：跨阻放大器，前置放大器，光接收机，CMOS模拟集成电路中南大学本科生毕业论文ABSTRACTIIABSTRACTInrecentyears,opticalfibercommunicationhasbeendevelopedtremendouslyandhasbecomethemaintransmissionmeansofthecommunicationsystem.Withtheexplosivegrowthofinformationexchangeandtransmission,thedemandforhigh-speedopticalreceiverandopticaltransmitterincreaseslargely.Transimpedanceamplifiers(TIA)areacriticalelementinopticalreceiversthataffectingthewholeopticalsystemperformance.ThusmadeTIAbeingofgreatvalueindeepresearch.Thisthesis'smainpurposeistodesignatransimpedanceamplifiersthatworkforsynchronousdigitalhierarchy(SDH)STM-1class,attherateof155Mbps.Severalkeyfeaturessuchashighgain,largebandwidthandlowequivalentinputnoiseshallbemet.Theroleoftransimpedanceamplifieristoamplifyweakphotodiodecurrenttoanappropriateoutputvoltage,areasonablecompromiseshallbemadebetweenthetransimpedancegain,bandwidth,nois