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    Energy-Autonomous MCU Operating in sub-VT Regime with Tightly-Integrated Energy-Harvester : A SoC for IoT smart nodes containing a MCU with minimum-energy point of 2.9pJ/cycle and a harvester with output power range from sub-µW to 4.32mW

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    Author
    Deng, J.; Nagel, J.; Zahnd, L.; Pons, M.; Ruffieux, D.; Arm, C.; Persechini, P.; Emery, S.
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    Abstract
    We describe a SoC achieving zero-net-energy operation by using energy harvesting and sub-threshold design. It consists of a microcontroller for data acquisition, data processing, and communication and an energy harvester unit enabling energy-autonomous operation. The microcontroller built with latch-based design achieves robust operation in a wide frequency range from 5 kHz to 40 MHz with a minimum energy point of 2.9 pJ/cycle @ 0.375V and 21 MHz. With this SoC, the battery lifetime is extended indefinitely thanks to the energy harvesting unit, which is capable to handle output power range from sub-μW to 4.32 mW with peak conversion efficiency of 65%. The tight integration of MCU and harvester enables the development of customized firmware algorithms for energy optimized operation with very diverse energy sources.
    Publication Reference
    2019 IEEE/ACM International Symposium on Low Power Electronics and Design (ISLPED), pp. 1-4
    Year
    2019
    URI
    https://yoda.csem.ch/handle/20.500.12839/340
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