Application of a low-frequency-pass filter in exponentially decaying signals

Chu, Benjamin; Xu, Renliang
May 1989
Review of Scientific Instruments;May89, Vol. 60 Issue 5, p910
Academic Journal
A digital low-frequency-pass filter is tested and applied to the data pretreatment of exponentially decaying signals. If the high-frequency cutoff of the low-frequency-pass filter is chosen properly, the filtration process can improve the signal-to-noise ratio of the data. Furthermore, correct characteristic parameters which would otherwise be buried by high-frequency noises can now be retrieved from the filtered signal. The technique is simple to implement using a personal computer and may find use in measurements of slowly decaying functions and kinetic studies.


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