PUBLICATIONS
Paper
[Domestic Journals] Seo-Hyeong Kim, Seong-Tak Ju, Hea-Gwang Jung, Kyo-Beum Lee, and Gyu-Bum Jung, "Performance Improvement of a Buck Converter using a 2nd-order Space Dithered Sigma-Delta Modulation based Random PWM Switching Scheme," The Transactions of the Korean Institute of Power Electronics, vol. 14, no. 1, pp. 54–61, Feb. 2009.
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This paper proposes the 2nd-order SDSDM (Space Dithered Sigma-Delta Modulation) for performance improvement of a buck
converter. The PWM (Pulse Width Modulation) has a drawback in that power spectrum tends to be concentrated around the
switching frequency. The resulting harmonic spikes cause a EMI(Electromagnetic Interference) and switching loss in semiconductor,
etc. The 1st-order SDSDM scheme is a kind of DSDM for reducing these harmonic spikes. In this scheme, a switching frequency is
spread through random dither generator placed on input part. In experimental result, the proposed 2nd-order SDSDM is confirmed
by applying to a buck converter.
