A 10Gb/s GaAs PHEMT High Gain Preamplifier for Optical Receivers  

10Gb/s GaAs PHEMT高增益光接收机前置放大器(英文)

作　　者：焦世龙[1] 杨先明[1] 赵亮[2] 李辉[2] 陈镇龙[1] 陈堂胜[3] 邵凯[2] 叶玉堂[1] 

机构地区：[1]电子科技大学光电信息学院,成都610054 [2]南京电子器件研究所,南京210016 [3]单片集成电路与模块国家级重点实验室,南京210016

出　　处：《Journal of Semiconductors》2007年第12期1902-1911,共10页半导体学报（英文版）

基　　金：国家自然科学基金(批准号:60277008);单片集成电路与模块国家级重点实验室基金(批准号:51491050105DZ0201)资助项目~~

摘　　要：A high gain cascade connected preamplifier for optical receivers is developed with 0.5μm GaAs PHEMT technology from the Nanjing Electronic Devices Institute. To begin with, the transimpedance amplifier has a -3dB bandwidth of 10GHz, with a small signal gain of around 9dB. The post-stage distributed amplifier （DA） has a -3dB bandwidth of close to 20GHz,with a small signal gain of around 12dB. As a whole,the cascade preamplifier has a measured small signal gain of 21.3dB and a transimpedance of 55.3dBΩ in a 50Ω system. With a higher signal-to-noise ratio than that of the TIA and a markedly improved waveform distortion compared with that of the DA, the measured output eye diagram for 10Gb/s NRZ pseudorandom binary sequence is clear and symmetric.基于南京电子器件研究所0.5μm GaAs PHEMT工艺,研制了一种高增益级联式光接收机前置放大器.作为前级的跨阻抗放大器的-3dB带宽为10GHz,小信号增益为9dB;作为后级的分布式放大器的-3dB带宽接近20GHz,小信号增益为12dB;级联前置放大器小信号增益达21.3dB,跨阻增益为55.3dBΩ,在输入10Gb/s非归零伪随机二进制序列下,放大器输出眼图清晰、对称、信噪比优于跨阻放大器,分布放大器不能校正的输入波形失真也得到显著改善.

关 键 词：GaAs PHEMT optical receiver PREAMPLIFIER eye diagram CASCADE 

分 类 号：TN722.3[电子电信—电路与系统]