A Low-Latency 200Gb/s PAM-4 Heterogeneous Transceiver in 0.13μm SiGe BiCMOS and 28nm CMOS for Retimed Pluggable Optics

📋 论文概要

针对AI等场景对带宽和低延迟的需求，提出一种200Gb/s PAM-4异构收发器，结合0.13μm SiGe BiCMOS和28nm CMOS工艺，用于重定时可插拔光学系统，解决了线性驱动可插拔光学在高速率下因插入损耗增大而性能退化的问题。

💡 主要创新点

• 采用0.13μm SiGe BiCMOS与28nm CMOS异构工艺集成，兼顾模拟高频性能与数字电路密度。
• 实现200Gb/s PAM-4重定时收发，支持低延迟光学互连，满足AI计算对超低延迟和带宽的需求。

🏷 关键词

📄 原文摘要

intelligence (AI) requires further bandwidth enhancement and has pushed SerDes towards 200G/lane [1]. Linear-drive pluggable optics (LPO) without integrated retimer or digital signal processer (DSP) has drawn great attention in 100G/lane transmission due to its superior energy efficiency [2], as depicted in Fig. 36.5.1(a). However, LPO have encountered difficulties in achieving reliable performance since the insertion loss (IL) of a very short-reach (VSR) channel is increased by ~14dB when the data rate is doubled [2]. In addition, the extremely low latency required by scenarios such as AI inference [3] does not align well with the 200G retimed solution as illustrated in Fig. 36.5.1(b) [4], which employs DSPs to compensate for the VSR channel with IL of ~30dB, and thus leads to severe latency. This paper introduces a heterogeneous

👥 作者与机构

Renjie Tang*, Kanan Wang*, Shuyi Xiang, Yu Su, Chenyao Cao, Yukun He, Xiaoyan Gui

Xi’an JiaoTong University, Xi’an, China *Equally Credited Authors (ECAs) Recently, the exponential growth of artificial