Spectrum analysis of measuring signals in sensor circuits with frequency outputs
Eligiusz Pawłowski · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2001
The FFT makes a powerful tool for analyzing signals in numerous measurement applications. The present paper deals with several problems concerning the application of the Fourier series analysis in the case when a fluctuating value of a measureand is converted into a frequency signal i.e. when instantaneous frequency of a pulse signal represents an instantaneous value of the measured quantity.