光通信用宽动态范围10Gb/s CMOS跨阻前置放大器  

Wide Dynamic Range CMOS Transimpedance Preamplifier for 10 Gb/s Optical Communication

作　　者：刘全[1] 冯军[1] 

机构地区：[1]东南大学射频与光电集成电路研究所,南京210096

出　　处：《半导体光电》2009年第2期264-267,共4页Semiconductor Optoelectronics

基　　金：国家"863"计划项目(2006AA01Z284)

摘　　要：采用UMC 0.13μm CMOS工艺,设计了一种应用于SDH系统STM-64(10 Gb/s)光接收机前置放大器。该前置放大器采用具有低输入阻抗特点的RGC形式的跨阻放大器实现。同时,引入消直流电路来扩大输入信号的动态范围。后仿真结果表明:双端输出时中频跨阻增益约为57.6 dBΩ,-3 dB带宽为10.7 GHz,平均等效输入噪声电流谱密度为18.76 pA/sqrt(Hz),1.2V单电压源下功耗为21 mW,输入信号动态范围40 dB(10μA^1 mA)。芯片面积为0.462 mm×0.566 mm。A preamplifier for the STM-64 （10 Gb/s）optical receiver in SDH system is realized by using UMC 0.13 μm CMOS technology. The RGC（Regulated Cascode） configuration is employed in the preamplifier because of its low input resistance. Meanwhile, in order to enlarge the dynamic range of the input signal, the DC-Cancellation is introduced into the circuit. Post simulation results show that the preamplifier has differential transimpedance gain of 57.6 dBΩ, --3 dB bandwidth of 10.7 GHz, the average noise current spectral density of 18.76 pA/sqrt （Hz） and the DC power dissipation of 21 mW at a single 1.2 V supply. The dynamic range of the input signal is 40 dB（10 μA-1mA）. The die area is 0. 462 mm×0. 566 mm.

关 键 词：光接收机 前置放大器 跨阻放大器 RGC 消直流 宽动态范围 0.13μm CMOS 

分 类 号：TN722.71[电子电信—电路与系统]