Patent ID: 6687631
Filing Date: 2004-02-03
Classification: G01R

Abstract:
A carrier function Laplace transform impedance spectrometer, comprising:a galvanostat/potentiostat for applying constant voltage, constant current or constant load to the electrical/electrochemical device by employing constant voltage source, constant current source or constant load element and thereby detecting voltage and current of the electrical/electrochemical device resulting from the constant current or voltage application; a voltage/current output unit for removing noise out of voltage and current detected in the galvanostat/potentiostat, also removing bias voltage and current and outputting the resulting signal; a two channel analog/digital converter for converting the voltage and current output from the voltage/current output unit into digital signal; and control means for fitting the digital voltage and current output from the analog/digital converter to carrier function, which is analytically Laplace transformable to thereby generate impedance spectrum and storing the result.