中文摘要：

基于IBM0．18μmSiGeBiCMOS工艺设计，实现了光接收机模拟前端，电路整体结构包括差分共射跨阻放大器（TIA）、限幅放大器（LA）以及输出缓冲级（Buffer）。采用SiGe异质结双极晶体管（HBT）作为输入级的差分共射跨阻放大器大大地减小了输入电阻，更好地展宽了频带。仿真结果表明，在1．8V电源电压供电下，驱动50Q电阻和10pF电容负载时光接收机前端跨阻增益为74．59dB，带宽为2．4GHz，功耗为39．6mw。在误码率为10、输入电流为50μA的条件下，光接收机前端电路实现了3Gb／s的数据传输速率。实测结果表明，光接收机的-3dB带宽为1．9GHz。芯片面积为910Hm×420μm。

英文摘要：

An optical receiver front-end circuit is designed and fabricated in IBM 0. 18 /~m SiGe BiCMOS technology. The whole circuit consists of a transimpedance amplifier （TIA） with differential common-source configuration, four limiting amplifiers and an output buffer. SiGe heterojunction bipolar transistors （HBTs） with better high-frequency performance are used for the differential input pair, thus reducing the equivalent input resistance, and effectively expan- ding the bandwidth of the optical receiver. The simulation results indicate that the optical receiv- er terminated with 50 ~1 load resistance and 10 pF load capacitance has a transimpedance gain of 74.59 dB, and a --3 dB bandwidth of 2.4 GHz. The optical receiver successfully realizes 3 Gb/s data rate with a bit-error rate of 10-9 at incident current of 50/~A. The fabricated optical receiver has 910 /~mX420 /~m chip area, and consumes 39.6 mW at 1.8 V supply. The experimental re- sults show that the optical receiver front-end achieves a --3 dB bandwidth of 1.9 GHz.