LAPLACE TRANSFORM IMPEDANCE SPECTROMETER AND ITS MEASUREMENT METHOD

摘要

Provided is a method of measuring impedance based on carrier function Laplace transform, comprising the steps of: (1) detecting a response signal from an object device to which signal excitation such as pulse, interrupt or constant load is applied; (2) obtaining parameters of a carrier function by linearly or non-linearly fitting the response signal in step (1) to the carrier function allowing an analytical Laplace transform; (3) calculating an impedance function in the Laplace domain by using an analytic relation between the carrier function and the Laplace transfer function calculated from carrier function obtained by the fitting results in step (2); (4) calculating the impedance spectrum in a frequency domain by using the parameters of the Laplace domain impedance function calculated in step (3), and calculating the measurement error of the frequency domain impedance spectrum using the standard deviation of the parameters and its correlation; and (5) displaying the frequency domain impedance spectrum calculated in step (4) and storing the result.