The effects of electrode impedance on receiver sensitivity in body channel communication

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The effects of the electrode interface on a receiver sensitivity in a body channel communication (BCC) are studied to clarify the characteristics of the electrode interface in the BCC, and revisit the noise and sensitivity analysis against the conventional method exploited in a radio frequency (RF) communication. First, the paper describes the noise characteristics in the electrode interface and examines the relationship between the noise and the contact impedance in the BCC frequency region. Then, we introduce a sensitivity analysis method dedicated to the BCC receiver by means of a receiver gain and an output noise spectral density. To verify the sensitivity analysis method, we implemented a direct conversion BCC receiver in 0.18 mu m CMOS technology. By measuring the gain, output spectral density, and sensitivity of the receiver with respect to the various source impedance values, we found that the calculated value through the proposed analysis method agrees well with the theoretical value within 2.5 dB difference. (C) 2016 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2016-07
Language
English
Article Type
Article
Citation

MICROELECTRONICS JOURNAL, v.53, pp.73 - 80

ISSN
0026-2692
DOI
10.1016/j.mejo.2016.04.011
URI
http://hdl.handle.net/10203/214498
Appears in Collection
EE-Journal Papers(저널논문)
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