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.
Dynamic OSR dithered sigma–delta modulation in solid statelight dimming / Orcioni, Simone; Rocco, D’Aparo; Armando, Lobascio; Conti, Massimo. - In: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS. - ISSN 0098-9886. - STAMPA. - 41:4(2013), pp. 387-395. [10.1002/cta.805]
Dynamic OSR dithered sigma–delta modulation in solid statelight dimming
ORCIONI, Simone;CONTI, MASSIMO
2013-01-01
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
