UDC 004.724
INVESTIGATION OF NON-GAUSSIAN PROPERTIES OF LOW-FREQUENCY NOISE IN OPERATIONAL AMPLIFIERS
A. Yu. Parshin, Ph.D. (Tech.), associate professor, Department of Radio Engineering Devices, RSREU, Ryazan, Russia;
orcid.org/0000-0003-0110-3645, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
G. P. Mazaev, student, RSREU, Ryazan, Russia;
orcid.org/0000-0002-6840-1164, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The paper evaluates the parameters of low-frequency noise obtained by a full-scale experiment - digitization of op amp output signal. The aim of the work is to experimentally confirm the hypothesis for the presence of non-Gaussian properties in low-frequency noises with power spectral density inversely proportional to noise frequency. The task is considered to be relevant when converting carrier frequency of ultranarrowband signals to a zero carrier, as well as in the process of demodulation. According to the experimental data, the calculation of non-Gaussian parameter, kurtosis coefficient, as well as constructing the dependence of kurtosis coefficient on the volume of experimental data is performed. According to the results of the study, non-Gaussian signal processing methods are proposed to be used in order to compensate for the influence of low-frequency noise and increase signal-to-noise ratio in ultra-narrowband signal processing systems.
Key words: low-frequency noise, flicker noise, phase noise, Gaussian model, non-Gaussian model, sig-nal processing, field experiment, kurtosis coefficient, Internet of things.