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Impedance measurement using multiharmonic least-squares waveform fitting algorithm
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DOI：10.1016/j.csi.2007.09.002.png)
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In this paper, a multiharmonic least-squares waveform fitting algorithm is used to measure impedances. By using analog to digital converters, a function generator, a reference impedance and the fitting algorithm, we show that it is possible to obtain the frequency response of a unknown linear impedance at the frequencies that correspond to the harmonics of the stimulus input signal. Results show that, with a 400 Hz triangular signal, harmonics up to the 49th can be used to measure the impedance frequency response of a parallel RLC circuit with experimental standard deviations below 1.5% for the impedance magnitude and F for the impedance phase. (D 2007 Elsevier B.V. All rights reserved.
Keyword:
impedance measurement
least-squares methods
waveform fitting
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