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基于BiCMOS工艺的光接收机前端电路

更新时间:2020-10-23 17:48:29 大小:892K 上传用户:gsy幸运查看TA发布的资源 标签:bicmos接收机前端电路 下载积分:2分 评价赚积分 (如何评价?) 收藏 评论(0) 举报

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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。

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 transimp...

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