基于0.18μm CMOS工艺2.5Gb/s宽动态范围光接收机前端放大电路设计  

Design of 2.5 Gb/s Wide Dynamic Range Optical Receiver Front-End Amplifier in 0.18 μm CMOS

作　　者：韩良[1,2] 孙骏毅[2] 张颖[2] 

机构地区：[1]哈尔滨工业大学微电子中心,黑龙江哈尔滨150001 [2]哈尔滨工业大学(威海)微电子中心,山东威海264209

出　　处：《微电子学与计算机》2011年第12期84-88,共5页Microelectronics & Computer

摘　　要：基于0.18μm CMOS工艺设计了适用于2.5Gb/s传输速率的宽动态范围光接收机前端放大电路(包括前置放大器和限幅放大器).前置放大器采用了RGC输入级的跨阻放大器,并且应用了消直流电路和自动增益控制电路扩展输入动态范围.限幅放大器采用了按比例缩小尺寸、并联峰化和带有有源负反馈的Cherry-Hooper放大器等方法扩展带宽.仿真结果表明:前端放大电路的中频增益为116dBΩ,-3dB带宽为2.13GHz,输入信号动态范围为40dB(0.01～1mA).A front-end amplifier circuit which can be applied to wide-dynamic-range optical receiver with 2.5Gb/s data rate has been designed based on 0.18 μm CMOS technology.Pre-amplifier utilizes Regulated Cascode（RGC） architecture as Transimpedance Amplifier（TIA）,meanwhile,DC-cancellation and Auto Gain Controlling（AGC） circuits are employed to expand its dynamic range.Limiting Amplifier（LA） makes the use of several approaches like scaling-down,shunt peaking and Cherry-Hooper amplifier with active feedback,to enlarge its bandwidth.Simulation result has manifested that the gain at medium frequency of the front-end amplifier（including pre-amp and limiting amp） is 116 dBΩ,-3 dB bandwidth is 2.13 GHz,input dynamic range is 40 dB（0.01~1 mA）.

关 键 词：跨阻放大器 限幅放大器 宽动态范围 消直流电路 自动增益控制 

分 类 号：TN432[电子电信—微电子学与固体电子学]