Conference Paper

3D Ultrasonic Gesture Recognition

DOI: 10.1109/ISSCC.2014.6757403 Conference: International Solid State Circuits Conference

ABSTRACT An ultrasonic 3D gesture recognition system uses an array of AlN MEMS transducers and custom readout electronics to localize targets over a +/-45deg field of view up to 1m away. The rms localization error at 0.5m range is 0.4mm, 0.2deg, and 0.8deg for the range, x-angle, and y-angle axes, respectively. The 0.18μm CMOS ASIC comprises 10 independent channels with separate high voltage transmitters, readout amplifiers, and ADCs. Power dissipation is 400μW at 30fps, and scales to 5μW/ch at 10fps.

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