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A Low-Power Smart Gesture Sensing SoC with On-chip Image Sensor for Smart Devices

This paper describes a low-power gesture sensing system-on-chip (SoC) for smart IoT devices such as wearables. A noise-tolerant smart gesture sensing processor and a low-resolution double exposure imager are utilized for achieving low power while maintaining accurate gesture sensing. Test chip measurement in 65nm shows that the dynamic power of the SoC is only ~3μW at 30fps. Its average recognition accuracy is ~85%.