0.6μm CMOS感性负载自偏置直接耦合激光驱动器

0.6 μm CMOS Inductive Load Self-biased Direct-coupled Laser Diode Driver

设计了一种可以工作在多个速率级的光纤通信系统用激光二极管驱动电路。电路采用了有源电感负载技术、键合线寄生电感负载技术、自偏置技术和放大级直接耦合技术以提高增益、拓展带宽、降低功耗。电路采用CSMC-HJ0.6 μm CMOS技术设计、采用Smart Spice进行电路性能仿真优化。激光驱动器电路的增益可达52dB,带宽可达到525MHZ,输出调制电流在0-65mA范围内可调。电路采用5V单电源供电,功耗380mW。模拟结果显示该电路可以工作在STM-1、STM-4两个标准速率级和更高的速率上。

A laser diode driver for the use of optical access network at several bit-rate levels has been designed. On-chip active inductor load, off-chip bonding-wire parasitic inductor load, self-biased technology and direct-coupled technology are employed to increase the gain, widen the bandwidth and reduce the power dissipation of the proposed laser diode driver. In this work, CSMC-HJ 0.6μ m CMOS technology and Smart Spice simulator are used to optimize and simulate the performances of this laser diode driver. The driver circuit can offer a DC gain of 32dB,a bandwidth of 525MHz and an adjustable modulation current from 0 to 65mA into an equivalent 50Ω load. The power consumption is about 380mW under a power supply voltage of 5V. According to the simulation results, the laser diode driver possibly operating well at STM-1, STM-4 or higher bit rates.