@inproceedings{81566e8e7b834f158d7afa1fe4bc6170,
title = "Dithered multi-bit sigma-delta modulator based DPWM for DC-DC converters",
abstract = "Multi-bit sigma-delta based digital pulse width modulators (DPWM) are used in the control of DC-DC converters in order to achieve high resolution and therefore high output voltage accuracy at switching frequencies up to multiple MHz. The standard sigma-delta modulators which have mainly been used in these DPWMs to date generate idle tones in the applied duty cycle which result in large oscillations in the output voltage. A dithered sigma-delta modulator is instead implemented here which eliminates these oscillations in the output voltage by adding a random signal before the quantizer in the sigma-delta modulator. The power spectral density of the duty cycle produced by the dithered sigma-delta modulator based DPWM shows a reduction in the undesirable idle tones and this is also verified experimentally using a buck converter prototype.",
keywords = "DC-DC converters, digital control, idle tones, sigma-delta digital pulse width modulator",
author = "James Mooney and Mark Halton and Petar Iordanov and Vincent O'Brien",
note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 ; Conference date: 15-03-2015 Through 19-03-2015",
year = "2015",
month = may,
day = "8",
doi = "10.1109/APEC.2015.7104752",
language = "English",
series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "May",
pages = "2835--2839",
booktitle = "APEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition",
edition = "May",
}