Presentation 2015-01-23
EMI Reduction for Switching Converter with Analog Spread Spectrum
Yasunori Kobori, Shinya Ochiai, Kotaro Kaneya, Nobukazu Tsukiji, Nobukazu Takai, Haruo Kobayashi,
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Abstract(in English) This paper proposes new EMI reduction method with spread spectrum using psuedo analog noise which is produced from M-sequence circuit with LPF and PLL circuit. The PLL circuit with analog noise makes the phase modulated clock pulses. Our new M-sequence circuit makes the period of 112 patarn clock's length with only 3-bit counter. Adapting this analog spread spectrum method to DC-DC switching buck converter, the spectrum level of PWM signal is reduced about 1/10 from normal PWM signal level.
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Keyword(in English) EMI Reduction / Spread Spectrum / PLL Circuit / Pseudo Analog Noise / Switching Converter
Paper # EMCJ2014-93
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Committee EMCJ
Conference Date 2015/1/15(1days)
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Paper Information
Registration To Electromagnetic Compatibility (EMCJ)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) EMI Reduction for Switching Converter with Analog Spread Spectrum
Sub Title (in English)
Keyword(1) EMI Reduction
Keyword(2) Spread Spectrum
Keyword(3) PLL Circuit
Keyword(4) Pseudo Analog Noise
Keyword(5) Switching Converter
1st Author's Name Yasunori Kobori
1st Author's Affiliation NIT, Oyama College()
2nd Author's Name Shinya Ochiai
2nd Author's Affiliation NIT, Oyama College
3rd Author's Name Kotaro Kaneya
3rd Author's Affiliation Gunma University
4th Author's Name Nobukazu Tsukiji
4th Author's Affiliation Gunma University
5th Author's Name Nobukazu Takai
5th Author's Affiliation Gunma University
6th Author's Name Haruo Kobayashi
6th Author's Affiliation Gunma University
Date 2015-01-23
Paper # EMCJ2014-93
Volume (vol) vol.114
Number (no) 398
Page pp.pp.-
#Pages 6
Date of Issue