12 Gb/s GaAs PHEMT跨阻抗前置放大器  

12 Gb/s CaAs PHEMT Transimpedance Preamplifier for Optical Receiver

作　　者：焦世龙[1] 冯暐[2] 陈堂胜[2] 范超[1] 李拂晓[2] 叶玉堂[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054 [2]南京电子器件研究所单片集成电路与模块国家级重点实验室,江苏南京210016

出　　处：《电子学报》2006年第6期1156-1158,共3页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60277008);教育部重点科技项目(No.03147);单片集成电路与模块国家级重点实验室基金(No.51491050105DZ0201)

摘　　要：采用0.5μm GaAs PHEMT工艺研制了一种单电源偏置光接收机跨阻抗前置放大器.放大器-3dB带宽约为9.5GHz;在50MHz^7.5GHz范围内,跨阻增益为43.5±1.5dBΩ,输入输出回波损耗均小于-10dB;带内噪声系数在4dB^6.5dB之间,由此得到的最小等效输入噪声电流密度约为17.6pA/Hz;输入12Gb/s NRI伪随机序列时,放大器输出眼图清晰,眼开良好.A kind of single power supply transimpedance preamplifier （TIA） for optical receiver is developed, using 0. 5μm GaAs PHEMT process. The TIA has a measured -3 dB bandwidth of 9. 5GHz,with transimpedance gain of 43. 5 ±1.5dBΩ in the range of 50MHz - 7. 5GHz. The return losses of input and output ports are both less than -10dB. The noise figure （NF） varies from 4dB to 6. 5dB within the bandwidth, while the calculated minimal equivalent input noise current density is about 17. 6pA/√Hz. The measured output eye diagram for 12Gb/s NRI pseudorandom binary sequence is clear and satisfying.

关 键 词：PHEMT 跨阻抗 前置放大器 

分 类 号：TN722.7[电子电信—电路与系统]