A VLSI Neural Monitoring System With Ultra-Wideband Telemetry for Awake Behaving Subjects

Long-term monitoring of neuronal activity in awake behaving subjects can provide fundamental information about brain dynamics for neuroscience and neuroengineering applications. Here, we present a miniature, lightweight, and low-power recording system for monitoring neural activity in awake behaving...

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Published inIEEE transactions on biomedical circuits and systems Vol. 5; no. 2; pp. 112 - 119
Main Authors Greenwald, E, Mollazadeh, M, Hu, C, Wei Tang, Culurciello, E, Thakor, V
Format Journal Article
LanguageEnglish
Published United States IEEE 01.04.2011
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Batteries
Biopotential amplifier
digital telemetry
electrocorticogram
electroencephalogram
Field programmable gate arrays
headmounted systems
Lithium
local field potentials
Microcontrollers
micropower instrumentation
neural interface
Product introduction
Receivers
Sensors
Telemetry
Transmitters
ultra-wideband telemetry
Very large scale integration
Wireless communication
wireless neural recording
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ISSN1932-4545
1940-9990
DOI10.1109/TBCAS.2011.2141670

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Summary:Long-term monitoring of neuronal activity in awake behaving subjects can provide fundamental information about brain dynamics for neuroscience and neuroengineering applications. Here, we present a miniature, lightweight, and low-power recording system for monitoring neural activity in awake behaving animals. The system integrates two custom designed very-large-scale integrated chips, a neural interface module fabricated in 0.5 μm complementary metal-oxide semiconductor technology and an ultra-wideband transmitter module fabricated in a 0.5 μm silicon-on-sapphire (SOS) technology. The system amplifies, filters, digitizes, and transmits 16 channels of neural data at a rate of 1 Mb/s. The entire system, which includes the VLSI circuits, a digital interface board, a battery, and a custom housing, is small and lightweight (24 g) and, thus, can be chronically mounted on small animals. The system consumes 4.8 mA and records continuously for up to 40 h powered by a 3.7-V, 200-mAh rechargeable lithium-ion battery. Experimental benchtop characterizations as well as in vivo multichannel neural recordings from awake behaving rats are presented here.
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ISSN:1932-4545
1940-9990
DOI:10.1109/TBCAS.2011.2141670