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Title:
ELECTRODE STRUCTURE
Document Type and Number:
Japanese Patent JP2010177768
Kind Code:
A
Abstract:

To provide an electrode structure that suppresses attenuation of a signal.

A first electrode 11 is arranged to envelope a second electrode 12. As a human body never comes into direct contact with the second electrode 12, therefore, there is a difference in intensity between signals that the first electrode 11 and second electrode 12 receive respectively, and a differential amplifier circuit 13 receives an electric field signal transmitted by amplifying the difference between signal components. The first electrode 41 is covered with an electrode guard 44 having a small relative dielectric constant, and a coupling state is prevented from greatly changing depending upon how the human body comes into contact with the first electrode 41, thereby minimizing variation in S/N ratio.


Inventors:
KAWANO RYUSUKE
FURUYA AKINORI
SATO HIDENORI
SHINAGAWA MITSURU
KADO YUICHI
YABE SEIJI
KIKUCHI RYOJI
MURATA TAKESHI
Application Number:
JP2009000015436
Publication Date:
August 12, 2010
Filing Date:
January 27, 2009
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE
NTT ELECTRONICS CORP
International Classes:
H04B13/00
Domestic Patent References:
JP2004125710A2004-04-22
JP2008236560A2008-10-02
JP2005217962A2005-08-11
JP2006191184A2006-07-20
Attorney, Agent or Firm:
三好 秀和
勝 治人



 
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