A Low Noise,1.25Gb/s Front-End Amplifier for Optical Receivers  

低噪声1·25Gb/s光接收机前端放大器(英文)

作　　者：薛兆丰[1] 李智群[1] 王志功[1] 熊明珍[1] 李伟[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：《Journal of Semiconductors》2006年第8期1373-1377,共5页半导体学报（英文版）

基　　金：国家高技术研究发展计划资助项目(批准号:2002AA312240)~~

摘　　要：This paper presents a low noise, 1.25Gb/s and 124dBΩ front-end amplifier that is designed and fabricated in 0.25μm CMOS technology for optical communication applications. Active inductor shunt peaking technology and noise optimization are used in the design of a trans-impedance amplifier,which overcomes the problem of inadequate bandwidth caused by the large parasitical capacitor of the CMOS photodiode. Experimental results indicate that with a parasitical capacitance of 2pF,this circuit works at 1.25Gb/s. A clear eye diagram is obtained with an input optical signal of - 17dBm. With a power supply of 3.3V, the front-end amplifier consumes 122mW and provides a 660mV differential output.设计并实现了一种基于TSMC 0·25μm CMOS工艺的低噪声、1·25Gb/s和124dBΩ的光接收机前端放大器.跨阻放大器设计采用了有源电感并联峰化和噪声优化技术,克服了CMOS光检测器大寄生电容造成的带宽不够的问题.测试结果表明,在2pF的寄生电容下,前端放大器工作速率达到了1·25Gb/s ,在光功率为-17dBm的光信号输入下得到了清晰的眼图.芯片采用3·3V电压供电,功耗为122mW,差分输出电压幅度为660mV.

关 键 词：front-end amplifier T1A shunt peaking active inductor 

分 类 号：TN722.71[电子电信—电路与系统]