Methods and devices for performing impedance spectroscopy
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United States of America Patent
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Apr 26, 2005
Grant Date -
Apr 15, 2004
app pub date -
Feb 25, 2003
filing date -
Feb 25, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A highly time resolved impedance spectroscopy that enhances the measurement of the dynamics of non-stationary systems with enhanced time resolution. The highly time resolved impedance spectroscopy includes an optimized, frequency rich a.c., or transient, voltage signal is used as the perturbation signal, non-stationary time to frequency transformation algorithms are used when processing the measured time signals of the voltage and current to determine impedance spectra which are localized in time; and the system-characterizing quantities are determined from the impedance spectra using equivalent circuit fitting in a time-resolution-optimized form. Methods and apparatus for processing impedance spectra data are also provided.
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