The PMIC can pull from any combination of two sources: photovoltaic cells, a thermoelectric generator, an RF energy harvester, or pulsed (kinetic) energy sources.
Socionext and Techsor recently tested the indoor and outdoor performance of IoT tags using the low-power wide area network ZETA—and the results showed bright promise for asset tracking.
The CryoCMOS Consortium has demonstrated transistor models operable at 4K and 77K, opening more doors for conventional electronics to operate at cryogenic temperatures.