【摘要】 采用0.13μm SiGe BiCMOS工艺，设计了一种分段式马赫-曾德尔调制器（MZM）高速驱动电路。驱动电路输入级中，采用容性负反馈来提高带宽，采用共模反馈来稳定共模输出电平，并通过共模反馈实现了可变增益。输出级中，采用负密勒电容、T-coil和电感峰化技术来提高带宽。输出级之间的延迟时间由微带线产生，提出了一种微带线的设计方法。仿真结果表明，驱动电路的最高工作速率可达50 Gbit/s,输出V_PP可达3 V,相邻输出级之间的延迟时间为4.9 ps。该驱动电路能较好地适用于分段式MZM。更多还原

【Abstract】 A high speed segmented Mach-Zehnder modulators(MZM) driver circuit was designed in a 0.13 μm SiGe BiCMOS process. The bandwidth of the driver input stage was expanded by the capacitive negative feedback, and the common-mode output voltage was stabilized by the common-mode feedback, contributing to a variable gain function. The bandwidth of the output stage was extended by the negative Miller capacitance, T-coil and inductive peaking technology. The propagation delay between close output stages was produced by microstrip transmission lines, so a design method of the microstrip transmission lines was presented. The simulation results show that, the maximum operating rate of the proposed driver circuit is 50 Gbit/s, the voltage output swing is 3 V and the propagation delay between close output stages is 4.9 ps. The driver circuit is well suited for segmented MZM.更多还原