112Gb/s四电平脉冲调制串行接口高速均衡技术研究

基于四电平脉冲调制的高速串行接口均衡技术是高速数据中心的核心技术之一，是军事气象预测、弹道导弹预警等新型作战支援行动的技术支撑。随着串行接口传输速率迈入112Gb/s，现有技术方案面临着频率补偿范围不足、功耗剧增、输出摆幅和线性度不足的瓶颈。本项目从高速数据中心的应用背景出发，拟针对112Gb/s 四电平脉冲调制高速串行接口的均衡技术开展研究：开发包括基于部分码元间隔的前馈均衡架构、组合式连续时间线性均衡架构的宽频带补偿技术，开发包括电压模驱动器和合路器、采用预判决技术和新型采样判决电路的判决反馈均衡器等低功耗技术，开发包括前馈均衡预加重技术、连续时间线性均衡电平移位技术的大摆幅高线性输出技术，并通过流片测试进行验证。本项目立足国防和军事需求，对于争夺国防科技制高点和主动权具有重要战略意义，研究成果可在远程医疗、自动驾驶等民用领域推广，对于打破国外垄断，推动产业发展具有重要经济价值。

The equalization for high-speed serial interface based on Four Level Pulse Amplitude Modulation, is one of the key technologies of the high-speed data centers. It plays an irreplaceable role in the combat support operations including military weather forecast, ballistic missile warning and so on. As the data rate of serial interface steps into 112Gb/s, current technical solutions are faced with new bottlenecks, such as the narrow frequency compensation range, sharp-increasing power consumption, insufficient output swing and linearity. Based on the application in high-speed data center, this project aims to study the equalization technologies for 112Gb/s high-speed serial interface using Four Level Pulse Amplitude Modulation. The research contents include: broadband compensation technology comprised of fractional-spaced feed-forward equalizing architecture, combined continuous-time linear equalizer; low-power technology consisting of drivers and combiners based on voltage mode logic, decision feedback equalizer using speculative technology and new sample-and-encode circuits; large-swing and high-linearity output technology including pre-emphasis in feed forward equalizer, level-shifting in continuous-time linear equalizer. These above technologies will be verified by tape-out and measurements. This project is supposed to meet the defense needs and military requirements, which is strategically important for snatching commanding heights and initiative of defense technologies. The expected research achievements can be widely used in the civil telemedicine and autopilot, which can break the foreign monopolies, promote industry development and create huge economic value.