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In this work we describe a system optimized to use the few microwatts generated by a 4 mm2 photovoltaic energy harvester to acquire, process and wirelessly transmit information about the environment temperature and light irradiance. The energy needed for the described power-expensive operations is obtained by charging a buffer capacitor while the system is in a low-power-consumption state. A voltage...
This paper describes a power management IC for piezoelectric energy harvesting which integrates an active AC-DC converter with residual charge inversion together with a smart self-supply architecture to speed up the start-up phase and increase harvesting effectiveness. Due to randomness of available power and to its typical intrinsic limitation to tens of μW the IC has been carefully designed to reduce...
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