APPARATUS FOR MEASURING INTERFACIAL IMPEDANCE BETWEEN THE BODY AND A STIMULATING ELECTRODE
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United States of America Patent
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Issued Date -
Feb 14, 2013
app pub date -
Apr 28, 2010
filing date -
Apr 28, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An apparatus includes a first electrode connected to one end of a cell within a living body, a second electrode connected to the other end of the cell within the living body. A measurement unit selectively extracts a voltage induced to the first and second electrodes depending on the current applied to the first and second electrodes. A charge storage unit stores a relative potential corresponding to a voltage difference between the first and second electrodes. An A/D conversion unit configured to convert a signal corresponding to the relative potential into a digital signal. An impedance calculation unit configured to calculate interfacial impedance of the first and second electrodes using the digital signal from the A/D conversion unit and the current applied to the second electrode.
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