Paper Abstract and Keywords |
Presentation |
2017-11-22 13:50
Improvement of Noise Source Amplitude Modulation Method to Identify Source Devices of Electromagnetic Interference Chiaki Ishida, Shinpei Yoshino, Chiaki Ogawa, Kengo Iokibe, Yoshitaka Tyota, Yasuyuki Nogami (Okayama Univ.) EMCJ2017-70 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
For a low cost determination of noise sources to reduce electromagnetic interference (EMI), we have proposed a method to identify devices dominantly contributing to EMI by noise source amplitude modulation and correlation analysis. In this study the proposed method was improved to measure the contribution of devices to EMI generation more accurately. Firstly, we assumed that the contribution can be affected with cross-correlation coefficients between data sequences used to modulate noise source amplitudes in the method. Based on the assumption, effects of the cross-correlation on measurements of the contribution were analyzed analytically. The accuracy was derived as a function of the cross-correlation. It indicated that small cross-correlation between the data sequences produced better contribution measurements. Secondly, data series with low cross-correlations less than 0.07 were applied to a simple PCB, and modulating the amplitude of simultaneous switching current of ICs. As a result, contributions of the ICs were measured more accurately than in measurements using data series with larger cross-correlations. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
noise source modulation / electro magnetic interference / noise source identification / pseudo-random bit sequence / correlation coefficients / simultaneous switching noise / / |
Reference Info. |
IEICE Tech. Rep., vol. 117, no. 319, EMCJ2017-70, pp. 35-40, Nov. 2017. |
Paper # |
EMCJ2017-70 |
Date of Issue |
2017-11-15 (EMCJ) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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EMCJ2017-70 |
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