An energy harvesting wireless sensor node for IoT systems featuring a near-threshold voltage IA-32 microcontroller in 14nm tri-gate CMOS

2016 IEEE Symposium on VLSI Circuits (VLSI-Circuits) Pub Date : 2016-06-15 DOI:10.1109/VLSIC.2016.7573485

Somnath Paul, V. Honkote, Ryan Kim, Turbo Majumder, Paolo A. Aseron, V. Grossnickle, R. Sankman, D. Mallik, S. Jain, S. Vangal, J. Tschanz, V. De

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引用次数: 25

Abstract

A wireless sensor node (WSN) integrates a 0.79mm2 near-threshold voltage (NTV) 32-bit Intel Architecture (IA) microcontroller (MCU) in 14nm tri-gate CMOS, along with solar cell, energy harvester, flash memory, sensors and Bluetooth Low Energy (BLE) radio, to enable always-on always-sensing (AOAS) and advanced edge computing capabilities in Internet-of-Things (IoT) systems. The MCU features four independent voltage-frequency islands (VFI), a low-leakage SRAM array, an on-die oscillator clock source capable of operating at sub-threshold voltage, power gating and multiple active/sleep states, managed by an integrated power management unit (PMU). The MCU operates across a wide frequency (voltage) range of 297MHz (1V) to 0.5MHz (308mV), and achieves a peak energy efficiency of 17pJ/cycle at an optimum supply voltage (VOPT) of 370mV, operating at 3.5MHz. The WSN, powered by a solar cell, demonstrates sustained MHz AOAS operation, consuming only 360μW.

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一种用于物联网系统的能量收集无线传感器节点，具有近阈值电压IA-32微控制器，采用14nm三栅极CMOS

无线传感器节点(WSN)在14nm三栅极CMOS中集成了0.79mm2近阈值电压(NTV) 32位英特尔架构(IA)微控制器(MCU)，以及太阳能电池、能量收集器、闪存、传感器和低功耗蓝牙(BLE)无线电，以实现物联网(IoT)系统中的永远在线(AOAS)和先进的边缘计算能力。MCU具有四个独立的电压频率岛(VFI)，一个低泄漏SRAM阵列，一个能够在亚阈值电压下工作的片上振荡器时钟源，功率门控和多种活动/睡眠状态，由集成电源管理单元(PMU)管理。MCU工作在297MHz (1V)至0.5MHz (308mV)的宽频率(电压)范围内，并在370mV的最佳电源电压(VOPT)下达到17pJ/cycle的峰值能量效率，工作在3.5MHz。该无线传感器网络由太阳能电池供电，实现了持续MHz的AOAS工作，功耗仅为360μW。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE Symposium on VLSI Circuits (VLSI-Circuits)

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