一种基于BCD工艺的850nm光接收芯片的研制  

Research of 850nm Optical Receiver Based on BCD Technology

作　　者：颜黄苹[1] 程翔[1] 李继芳[1] 黄元庆[1] 

机构地区：[1]厦门大学物理与机电工程学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2010年第5期640-644,共5页Journal of Xiamen University：Natural Science

基　　金：厦门市科技计划项目(3502Z20063002)

摘　　要：采用0.5μm BCD工艺研制了一种850 nm光接收芯片,包括光电探测器、跨阻前置放大器及后续处理电路.通过器件模拟设计并分析了基于BCD工艺的光电探测器的结构及其特性;设计光接收芯片的增益约为43.23 kΩ,上限截止频率为700 MHz.测试结果表明,探测器暗电流为pA量级,响应度为0.08 A/W.光接收芯片功耗约为100 mW,电噪声为4 nW;在输入313 Mbit/s非归零伪随机二进制序列调制的信号及无误码的情况下,灵敏度为-13.0 dB.m;该光接收芯片速率可达622 Mbit/s.An 850 nm optical receiver has been developed with 0.5 μm BCD technology,including a photodetector,tranimpedance preamplifier and the relevant processing circuit.The structure and characteristics of photodetector based on BCD technology are designed and analyzed by device technology simulation.The gain and uppercut-off frequency of optical receiver is designed to 43.23 kΩ and 700 MHz,respectively.Measurement results indicate that the dark current of photodetector is pA magnitude and responsivity is 0.08 A/W.The power dissipation of optical receiver is 100 mW,and the electrical noise is 4 nW.The sensitivity of optical receiver is-13.0 dB·m without bit error for the 850 nm optical signal modulated by 313 Mbit/s NRZ pseudo random binary sequence.The optical receiver is in normal operation for the modulated 622 bit/s optical signal.

关 键 词：光接收芯片 BCD 探测器 前置放大器 

分 类 号：TN491[电子电信—微电子学与固体电子学]