A 6.45 mu W Self-Powered SoC With Integrated Energy-Harvesting Power Management and ULP Asymmetric Radios for Portable Biomedical Systems

作者：Roy Abhishek^*; Klinefelter Alicia; Yahya Farah B; Chen Xing; Gonzalez Guerrero Luisa Patricia; Lukas Christopher J; Kamakshi Divya Akella; Boley James; Craig Kyle; Faisal Muhammad; Oh Seunghyun; Roberts Nathan E; Shakhsheer Yousef; Shrivastava Aatmesh; Vasudevan Dilip P; Wentzloff David D; Calhoun Benton H

来源：IEEE Transactions on Biomedical Circuits and Systems, 2015, 9(6): 862-874.

DOI：10.1109/TBCAS.2015.2498643

• Digital signal processing
• energy harvesting
• internet-of-things
• system-on-chip
• wakeup radios

This paper presents a batteryless system-on-chip (SoC) that operates off energy harvested from indoor solar cells and/or thermoelectric generators (TEGs) on the body. Fabricated in a commercial 0.13 mu W process, this SoC sensing platform consists of an integrated energy harvesting and power management unit (EH-PMU) with maximum power point tracking, multiple sensing modalities, programmable core and a low power microcontroller with several hardware accelerators to enable energy-efficient digital signal processing, ultra-low-power (ULP) asymmetric radios for wireless transmission, and a 100 nW wake-up radio. The EH-PMU achieves a peak end-to-end efficiency of 75% delivering power to a 100 mu A load. In an example motion detection application, the SoC reads data from an accelerometer through SPI, processes it, and sends it over the radio. The SPI and digital processing consume only 2.27 mu W, while the integrated radio consumes 4.18 mu W when transmitting at 187.5 kbps for a total of 6.45 mu W.

• 出版日期2015-12