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A 0297-pJBit 504-GbsWire Inverter-Based Short-Reach Simultaneous Bi-Directional
5nm CMOS工艺下基于逆变器的短距离双向通信物理层,实现50.4Gb/s/线速率和0.297pJ/bit能效。
5nm CMOS, 750mV, 50.4Gb/s/wire, 0.297pJ/bit, 1.2mm片上通道
双向通信硅中介层能效优化芯片间互联CMOS物理层
▸创新点1:时钟前传的逆变器架构(电路创新) - 采用时钟前传技术结合逆变器架构,显著降低了信号传输延迟和功耗,在5nm CMOS工艺下实现0.297pJ/bit的超低能耗,适用于高频短距离通信场景。
▸创新点2:同时双向信号传输(SBD)(系统创新) - 通过创新的同时双向信号传输技术,在单根线缆上实现双向数据传输,带宽利用率提升100%(50.4Gb/s/wire),相比传统PAM4方案具有更优的能效比。
▸创新点3:硅中介层高密度互连优化(方法创新) - 针对硅中介层特性优化信号完整性和串扰抑制方案,在1.2mm片上通道实现750mV低电压驱动,为chiplet系统提供可靠的物理层解决方案。
▸创新点4:混合信号处理架构(电路创新) - 结合数字时钟恢复与模拟均衡技术,在保持逆变器简单结构的同时有效补偿通道损耗,支持25.2Gb/s/direction的高速数据传输。
Abstract
This article presents a clock-forwarded, inverter-
based short-reach simultaneous bi-directional (ISR-SBD) physical
layer (PHY) targeted for die-to-die communication over silicon
interposers or similar high-density interconnect. Short-reach
links of this type are increasingly important to support larger
systems built with chiplets and multiple die and to facilitate
the shift to medium- and long-range optical communication
based on silicon photonics. This project explores the advan-
tages of simu