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A Software-Defined Always-On System With 5775-nW Wake-Up Function Using Asynchron
提出一种超低功耗软件定义始终唤醒系统，显著降低物联网设备在随机稀疏事件场景下的功耗。
5775-nW Wake-Up Function, 41 nW on-call waiting, 57 nW LTA power
超低功耗软件定义始终唤醒物联网异步架构
▸创新点1：无时钟时间屏蔽电平交叉ADC（TS-LCADC），通过时钟自由自适应采样量化随机稀疏事件信号，减少采样点和功耗，等待IoT事件时功耗仅为41 nW。
▸创新点2：软件定义无时钟多功能检测器，具有离线和在线可编程性，能够表征多种IoT事件的信号特征，实现多功能和动态唤醒功能。
▸创新点3：异步流水线事件驱动架构，仅在检测参数超过阈值时唤醒高性能系统，最小化系统活动和功耗，长期平均功耗仅为57 nW。
▸创新点4：系统整体功耗显著降低，长期平均功耗比之前通用唤醒芯片低30倍，适用于心率、癫痫和关键词包络检测等多种应用场景。
Abstract
This work presents an ultra-low-power software-
defined always-on wake-up system to drastically decrease
the system power of Internet of Things (IoTs) devices,
which usually operate in random-sparse-event (RSE) scenarios.
It mainly thanks to a clock-free time-shielding level-crossing ADC
(TS-LCADC), software-defined clock-free multi-function detec-
tors, and an asynchronous pipelined event-driven architecture.
First, by quantifying RSE noisy signals with clock-free adap-
tive sampling in a signal-