A 0.78mW/cm2 autonomous thermoelectric energy-harvester for biomedical sensors
2015 Symposium on VLSI Circuits (VLSI Circuits)（2015）
Abstract
A thin-film array-based thermoelectric energy-harvester (TEH) is assembled in a 0.83cm
2
footprint and attached to a power management unit integrated in 65nm CMOS. A single-inductor topology with analog maximum-power-point tracking leads to a 68% peak end-to-end efficiency and <;20ms tracking time. A 645μW regulated output power (effective 3.5K) is harvested in-vivo from a rat implanted with our TEH, to demonstrate true energy autonomy in real environment while achieving a 7.9x improvement in regulated power density. The autonomous operation is measured down to 65mV TEH input.
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Key words
autonomous thermoelectric energy-harvester,biomedical sensors,thin-film array-based thermoelectric energy-harvester,power management unit,CMOS,single-inductor topology,analog maximum-power-point tracking,regulated power density,size 65 nm,efficiency 68 percent,power 645 muW,voltage 65 mV
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