Minchang Cho, Sechang Oh, Seokhyeon Jeong, Yiqun Zhang, Inhee Lee, Yejoong Kim, Li-Xuan Chuo, Dongkwun Kim, Qing Dong, Yen-Po Chen, M. Lim, M. Daneman, D. Blaauw, D. Sylvester, Hun-Seok Kim
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引用次数: 13
Abstract
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 stand-alone system achieves 38mins of speech recording and energy-autonomous operation in room light.
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