Wireless Multichannel Integrated Potentiostat for Distributed Neurotransmitter Sensing

Author

K. Murari;C.M. Sauer;M. Stanacevic;G. Cauwenberghs;N. Thakor

Author_Institution

Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205. kartik@jhu.edu

fYear

2005

fDate

6/27/1905 12:00:00 AM

Firstpage

7329

Lastpage

7332

Abstract

Sensing neurotransmitters is critical in studying neural pathways and neurological disorders. An integrated device is presented which incorporates a potentiostat and a power harvesting and telemetry module. The potentiostat features 16 channels with multiple scales from microamperes to picoamperes. The wireless module is able to harvest power through inductively coupled coils and uses the same link to transmit data to and from the potentiostat. An integrated prototype is fabricated in CMOS technology, and experimentally characterized. Test results show RF powering introduces noise levels of 0.42 % and 0.18 % on potentiostat current scales of 500pA and 4nA respectively. Real-time multi-channel acquisition of dopamine concentration in vitro is performed with carbon fiber sensors

Keywords

"Wireless sensor networks","Neurotransmitters","CMOS technology","Neural pathways","Telemetry","Coils","Prototypes","Testing","Radio frequency","Noise level"

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the

ISSN

1094-687X

Print_ISBN

0-7803-8741-4

Electronic_ISBN

1558-4615

Type

conf

DOI

10.1109/IEMBS.2005.1616204

Filename

1616204