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
This 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.
keywords: Energy harvesting, solar cell, biomedical circuits, CMOS
Publication: Congress
1624015053812
June 18, 2021
/research/publications/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
This 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. - E. Ferro, P. López, V.M. Brea, D. Cabello - 10.1109/ISCAS.2019.8702742
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