10Gb/s0.18μm CMOS工艺电流型VCSEL驱动器的设计

Design of 10Gb/s0.18μm CMOS Current-mode VCSEL Driver

本文介绍了一种采用0.18μm CMOS工艺实现的电流型垂直腔面发射激光器(VCSEL:Vertical Cavity Surface Emitting Laser)驱动器电路。驱动器电路的核心单元由预放大级和输出级电路组成。为了扩展带宽、降低功耗,预放大级电路采用低阻抗负载的三级级联差分放大器技术和有源负反馈技术;输出级电路采用了C3A技术。仿真结果表明,1.8V电源供电时,工作速率为10Gb/s以上,输出调制电流可达12.7mA。

This paper introduces a VCSEL(Vertical Cavity Surface Emitting Laser)driver circuit implemented in a 0.18μm CMOS process.The core unit of the driver circuit consists of a preamplifier stage and an output stage circuit.In order to expand the bandwidth and reduce the power consumption,the pre-amplifier circuit uses a three-stage cascaded differential amplifier technology with low impedance load and active negative feedback technology;the output stage circuit uses C3A technology.The simulation results show that when the 1.8V power supply is used,the operating speed is 10Gb/s or more,and the output modulation current can reach 12.7mA.