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Spectrum of a frequency modulated pulse width modulation signal
Author(s) -
Kılınç Selçuk,
Çabuk Gökhan
Publication year - 2015
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.1948
Subject(s) - pulse width modulation , emi , electromagnetic interference , signal (programming language) , electronic engineering , modulation (music) , interference (communication) , frequency modulation , electrical engineering , pulse frequency modulation , transistor , power (physics) , physics , amplitude modulation , engineering , computer science , acoustics , voltage , radio frequency , channel (broadcasting) , quantum mechanics , programming language
In power electronics, the switching elements are controlled by pulse width modulated (PWM) signals making their currents on and off repeatedly. This might cause electromagnetic interference (EMI) problems especially in switched mode power supplies. One method for mitigating the EMI is to use the frequency modulation technique in the control signal of the switching metal–oxide–semiconductor field‐effect transistor. According to this approach, frequency of the PWM signal is modulated in order to spread its spectrum and hence reduce the EMI levels. This paper presents the theoretical analysis for the spectrum of a frequency modulated PWM signal. Copyright © 2013 John Wiley & Sons, Ltd.