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Wireless multi-channel sensor for neurodynamic studies
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DOI：10.1109/ICSENS.2004.1426320.png)
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This paper presents the design of a bio-compatible, im-plantable neural recording device for Aplysia californica, a common sea slug. Low-voltage extracellular neural signals (< 100 mu V) are recorded using a high-performance, low-power, low-noise preampliflier that is integrated with programmable data acquisition and control, and FSK telemetry that provides 5-kbps wireless neural data through 18 cm of saltwater. The telemetry utilizes an 8-cm electric dipole antenna matched to 50 Omega by exposing the ends of the antenna to the saltwater. A 3-V lithium ion battery (160 mAh) allows 16 hours of recording. Neural data obtained using extracellular nerve electrodes and a wired interface to this device have 2.5-mu Vrms noise, comparable to commercial neural recording equipment.
Keyword:
implantable
data acquisition
telemetry
low-power circuits
low-noise amplifier
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Wireless implantable microsystems: High-density electronic interfaces to the nervous system.png)
PROCEEDINGS OF THE IEEE
PROCEEDINGS OF THE IEEEIF25.9
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