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Dynamic OSR dithered sigma–delta modulation in solid state light dimming
Author(s) -
Orcioni Simone,
d'Aparo Rocco,
Lobascio Armando,
Conti Massimo
Publication year - 2013
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.805
Subject(s) - dither , delta sigma modulation , oversampling , pulse width modulation , delta modulation , modulation (music) , electronic engineering , reduction (mathematics) , computer science , control theory (sociology) , engineering , electrical engineering , pulse (music) , physics , control (management) , pulse amplitude modulation , voltage , mathematics , noise shaping , artificial intelligence , cmos , geometry , acoustics
SUMMARY Pulse width modulation (PWM) is the most common way to control switching regulation and digital dimming. This paper presents a way to implement digital dimming by means of a dithered sigma–delta modulator with dynamic oversampling ratio. The system has been modeled in SystemC‐WMS and implemented in a board using a commercial microcontroller. Simulation results show conducted electromagnetic interference reduction compared to PWM and flickering reduction with respect to classic sigma‐delta modulation. Copyright © 2011 John Wiley & Sons, Ltd.