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We present a complete, fully functional energy-autonomous audio sensor node with 6×5×4mm3 form factor. The system uses a new audio processing IC integrated with a MEMS microphone, general purpose 32-bit processor, 8Mb Flash, RF transceiver with custom 3D antenna, PV cells for energy harvesting and battery. The 4.7μW audio processing IC performs audio acquisition with 4–32× compression. The complete...
It is well known that technology scaling has led to increasing process/voltage/temperature/aging margins that substantially degrade performance and power in modern processors and SoCs. One approach to address these large timing margins is the use of specialized registers on critical paths that perform error detection and correction (EDAC) [1-5]. While promising, the previously proposed implementations...
This paper presents a fully integrated energy harvester that maintains 35% end-to-end efficiency when harvesting from a 0.84 mm solar cell in low light condition of 260 lux, converting 7 nW input power from 250 mV to 4 V. Newly proposed self-oscillating switched-capacitor (SC) DC-DC voltage doublers are cascaded to form a complete harvester, with configurable overall conversion ratio from 9×...
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