Fitting multiple RC time constants

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The full length article Fast fitting of multi-exponential decay curves in Optics Communications 134 dated 15 January 1997 pages 371-378 may be a reference of note and some edification.

Abstract
In the analysis of time-resolved measurements of fluorescence decays, one is usually confronted with the essentially non-linear fitting problems. There are several standard methods for non-linear minimization, but they are all very sensitive to initial guess parameters and are time consuming. Recently, Sasaki and Masuhara and independently Apanasovich and Novikov proposed an elegant method of quasi-linearizing the problem of multi-exponential fitting. In the present paper it will be shown, that their method can be improved by better taking into account the statistical character of the measured data.

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