24 Channel dual-band wireless neural recorder with activity-dependent power consumption

A complete light weight 24 channel wireless neural recording system enabled by a custom IC is presented. By transmitting only the action potential (AP) data, the system power consumption is scaled based on the activity of the neural signal. By detecting an AP event prior to digitization, the ASIC ca...

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Bibliographic Details
Published inAnalog integrated circuits and signal processing Vol. 83; no. 3; pp. 317 - 329
Main Authors Mitra, Srinjoy, Putzeys, Jan, Lopez, Carolina Mora, Pennartz, C. M. A, Yazicioglu, Refet Firat
Format Journal Article
LanguageEnglish
Published New York Springer US 01.06.2015
Subjects
Channels
Circuits and Systems
Classification
Electrical Engineering
Engineering
Integrated circuits
Noise levels
Power consumption
Recording
Signal,Image and Speech Processing
Transmission
Weight reduction
Analog buffer
Wireless neural recording
Activity dependent power consumption
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Summary:A complete light weight 24 channel wireless neural recording system enabled by a custom IC is presented. By transmitting only the action potential (AP) data, the system power consumption is scaled based on the activity of the neural signal. By detecting an AP event prior to digitization, the ASIC can reduce the power consumed in all subsequent stages and yet conserves the entire AP shape without affecting the classification performance. The complete 2.5 cm 3 head stage weighing below 7 g can operate for 3 h. The ASIC achieves <3.5 µVrms noise (both in AP and LFP band) and >70 dB CMRR.
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ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-015-0532-0