On-Chip Solar Cell and PMU on the Same Substrate with Cold Start-Up from nW and 80 dB of Input Power Range for Biomedical Applications

TítuloOn-Chip Solar Cell and PMU on the Same Substrate with Cold Start-Up from nW and 80 dB of Input Power Range for Biomedical Applications
AutoresE. Ferro, P. López, V.M. Brea, D. Cabello
TipoComunicación para congreso
Fonte 2019 IEEE International Symposium on Circuits and Systems, Sapporo (Japón), IEEE, pp. 4 , 2019.
AbstractThis paper presents a 1 mm2 solar cell and a Power Management Unit (PMU) on the same substrate to rise up the harvested voltage above 1.1 V to power wearable or implantable devices. The on-chip solar cell and the PMU are fabricated in standard 0.18 μm CMOS technology achieving a form factor of 1.575 mm2 . Experimental results show that the PMU is able to start-up from a harvested power of 2.38 nW without any external kick off or control signal and can handle a harvested power up to μW with a continuous and two-dimensional Maximum Power Point Tracking (MPPT) that works in open-loop mode to set the frequency, the gain and the capacitor sizes of a charge pump.
Palabras chaveEnergy harvesting, solar cell, biomedical circuits, CMOS