一种用于mW-Range IoT端节点的节能低压摆幅收发器
An Energy-Efficient Low-Voltage Swing Transceiver for mW-Range IoT End-Nodes
摘要：
随着物联网（IoT）应用变得越来越普遍，IoT端节点需要越来越多的在几mW的功率包络内的计算能力，以及高速且节能的芯片间通信，以处理新兴的近传感器分析应用的不断增长的输入/输出和内存带宽。虽然SPI等传统接口无法满足这些严格的要求，但低压摆幅收发器能够以极低的功耗实现数Gbps的带宽，因此可以应对这一挑战。然而，最近对高速串行链路的研究仅部分解决了这一挑战，仅提出了部分或独立的设计，而没有解决它们在实际系统中的集成及其相关影响。在本文中，我们首次提出了集成在低功耗（mW范围）物联网端节点处理器中的低压摆幅收发器的完整设计和系统级架构，并将其与现有的微控制器接口进行了比较。该收发器采用商用65 nm CMOS技术实现，与传统微控制器外设（单通道）相比，能效提高10.2倍，性能提高15.7倍。
英文摘要：
As the Internet-of-Things (IoT) applications become more and more pervasive, IoT end nodes are requiring more and more computational power within a few mW of power envelope, coupled with high-speed and energy-efficient inter-chip communication to deal with the growing input/output and memory bandwidth for emerging near-sensor analytics applications. While traditional interfaces such as SPI cannot cope with these tight requirements, low-voltage swing transceivers can tackle this challenge thanks to their capability to achieve several Gbps of bandwidth at extremely low power. However, recent research on high-speed serial links addressed this challenge only partially, proposing only partial or stand-alone designs, and not addressing their integration in real systems and the related implications. In this paper, we present for the first time a complete design and system-level architecture of a low-voltage swing transceiver integrated within a low-power (mW range) IoT end-node processors, and we compare it with existing microcontroller interfaces. The transceiver, implemented in a commercial 65-nm CMOS technology achieves 10.2x higher energy efficiency at 15.7x higher performance than traditional microcontroller peripherals (single lane).
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