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Millimeter-scale nearly perpetual sensor system with stacked battery and solar cells

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10 Author(s)
Gregory Chen ; Univ. of Michigan, Ann Arbor, MI, USA ; Matthew Fojtik ; Daeyeon Kim ; David Fick
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An 8.75 mm3 sensor system is implemented with a near-threshold ARM Cortex-M3 core, custom 3.3 fW leakage-per-bit SRAM, two 1 mm2 solar cells, a thin-film Li-ion battery, and an integrated power management unit. The 2.1 ¿W system enters a 100 pW data-retentive sleep state between sensor measurements and harvests energy from the solar cells to enable nearly perpetual operation.

Published in:

2010 IEEE International Solid-State Circuits Conference - (ISSCC)

Date of Conference:

7-11 Feb. 2010