10Gb/s光接收机跨阻前置放大器芯片设计研究  

Study on Design of the Transimpedance Preamplifier Chip for 10Gb/s Optical Receiver

作　　者：李久[1] 何进[1] 童志强[1] 黄启俊[1] 常胜[1] 王豪[1] 

机构地区：[1]武汉大学物理科学与技术学院,武汉430072

出　　处：《半导体光电》2017年第4期562-565,共4页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(61204096;61404094);中国博士后科学基金项目(2012T50688);中央高校基本科研项目(2042015kf0174;2042014kf0238);湖北省自然科学基金项目(2014CFB694);江苏省科学基金项目(BK20141218)

摘　　要：采用0.18μm BiCMOS工艺设计并实现了一种高增益、低噪声、宽带宽以及大输入动态范围的光接收机跨阻前置放大器。在寄生电容为250fF的情况下,采用全集成的四级放大电路,合理实现了上述各项参数指标间的折中。测试结果表明:放大器单端跨阻增益为73dB,-3dB带宽为7.6GHz,灵敏度低至-20.44dBm,功耗为74mW,最大差分输出电压为200mV,最大输入饱和光电流峰-峰值为1mA,等效输入噪声为17.1(pA)/(Hz)^(1/2),芯片面积为800μm×950μm。A high gain, low noise, wide bandwidth and large input dynamic range transimpedance amplifier was designed and implemented by using 0.18μm BiCMOS technology.With a parasitic capacitance of 250 fF, the main amplifying circuit, two-stage differential amplifier circuit and output buffer circuit structure were used to realize the good tradeoff betweengain, bandwidth, noise and dynamic range. The testing results indicated that the single end transimpedanee gain was 73 dB, the -3 dB bandwidth was 7.6 GHz, the sensitivity was as low as -20.44 dBm and power consumption was 74 mW. The maximum differential output voltage was 200 mV, the maximum input saturated photocurrent 1 mA, the equivalent input noise was 17.1 pA/√Hz and the die size was as small as 800μm×950μm.

关 键 词：跨阻放大器 光接收机 等效输入噪声电流谱密度 BICMOS工艺 

分 类 号：TN722[电子电信—电路与系统]