High-impedance optical electrode
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United States of America Patent
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Mar 22, 2005
Grant Date -
N/A
app pub date -
Jul 3, 2001
filing date -
Jul 3, 2000
priority date (Note) -
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Abstract
High-impedance optical electrodes modulate light in response to a life-form bio-potential and then converts the modulated light to an electrical signal that provides traditional EEG and EEC type output. Light splitters are used to provide multiple electrodes and an electronic reference source. A pilot tone is used to achieve high sensitivity and synchronize multiple units while an optical phase-shift modulator is used to reduce optical noise.
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