A 6×5×4mm³ general purpose audio sensor node with a 4.7μW audio processing IC

Minchang Cho,Sechang Oh,Seokhyeon Jeong,Yiqun Zhang,Inhee Lee,Yejoong Kim,Li Xuan Chuo,Dongkwun Kim,Qing Dong,Yen Po Chen,Martin Lim,Mike Daneman,David Blaauw,Dennis Sylvester,Hun Seok Kim

2017 Symposium on VLSI Circuits（2017）

引用 15|浏览132

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摘要

We present a complete, fully functional energy-autonomous audio sensor node with 6×5×4mm ³ 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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关键词

general purpose audio sensor node,audio processing IC,energy-autonomous audio sensor node,MEMS microphone,processor,flash memory,RF transceiver,3D antenna,PV cells,energy harvesting,power 4.7 muW,word length 32 bit,memory size 8 MByte,time 38 min

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A 6×5×4mm3 general purpose audio sensor node with a 4.7μW audio processing IC

A 6×5×4mm³ general purpose audio sensor node with a 4.7μW audio processing IC