Sensors 2013, 13(5), 6014-6031; doi:10.3390/s130506014
Article

An Implantable Neural Sensing Microsystem with Fiber-Optic Data Transmission and Power Delivery

Received: 22 March 2013; in revised form: 6 May 2013 / Accepted: 7 May 2013 / Published: 10 May 2013
(This article belongs to the Section Physical Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: We have developed a prototype cortical neural sensing microsystem for brain implantable neuroengineering applications. Its key feature is that both the transmission of broadband, multichannel neural data and power required for the embedded microelectronics are provided by optical fiber access. The fiber-optic system is aimed at enabling neural recording from rodents and primates by converting cortical signals to a digital stream of infrared light pulses. In the full microsystem whose performance is summarized in this paper, an analog-to-digital converter and a low power digital controller IC have been integrated with a low threshold, semiconductor laser to extract the digitized neural signals optically from the implantable unit. The microsystem also acquires electrical power and synchronization clocks via optical fibers from an external laser by using a highly efficient photovoltaic cell on board. The implantable unit employs a flexible polymer substrate to integrate analog and digital microelectronics and on-chip optoelectronic components, while adapting to the anatomical and physiological constraints of the environment. A low power analog CMOS chip, which includes preamplifier and multiplexing circuitry, is directly flip-chip bonded to the microelectrode array to form the cortical neurosensor device.
Keywords: brain machine interface; neural probe array; neuromotor prosthesis; optical telemetry; photovoltaic device
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MDPI and ACS Style

Park, S.; Borton, D.A.; Kang, M.; Nurmikko, A.V.; Song, Y.-K. An Implantable Neural Sensing Microsystem with Fiber-Optic Data Transmission and Power Delivery. Sensors 2013, 13, 6014-6031.

AMA Style

Park S, Borton DA, Kang M, Nurmikko AV, Song Y-K. An Implantable Neural Sensing Microsystem with Fiber-Optic Data Transmission and Power Delivery. Sensors. 2013; 13(5):6014-6031.

Chicago/Turabian Style

Park, Sunmee; Borton, David A.; Kang, Mingyu; Nurmikko, Arto V.; Song, Yoon-Kyu. 2013. "An Implantable Neural Sensing Microsystem with Fiber-Optic Data Transmission and Power Delivery." Sensors 13, no. 5: 6014-6031.

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