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Paper Abstract and Keywords
Presentation 2004-12-10 15:40
A proposal of a parameter optimization algorithm for LECSS: EMC macro-modeling of IC/LSI power current
Yohei Nomura, Jun Kawashima, Nobuo Funabiki, Toyohiro Toyota, Yuichirou Minamisawa, Osami Wada (Okayama Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a parameter optimization algorithm for the EMC macro-modeling of IC/LSI power currents called the LECCS(Linear Equivalent Circuit and Current Source) model. The unnecessary electro-magnetic wave from a digital electric device causes an electromagnetic interference to other apparatus, and thus, its reduction has been emphasized as one of the highest priority issues in digital electric device design societies. In order to simulate accurately high frequency current from the power-supply system in IC/LSIs that is its primary resource, the LECCS model has been proposed as a linear macro-model of a device power-supply circuit. In the LECCS model, the circuit between the power supply and the ground in a circuit is described as a combination of RLC-series circuits in parallel. Given a set of measured impedances at various frequencies, our algorithm first finds the number of RLC-series circuits from the number of valleys, and then, it searches optimal values of RLC parameters by the local search method. The validity of our algorithm is verified through applications to the results of a real device where the accuracy and the required processing time in our result are compared with those by the manual model tuning.
Keyword (in Japanese) (See Japanese page) 
(in English) EMC / IC/LSI power-supply model / LECCS / parameter optimization / algorithm / / /  
Reference Info. IEICE Tech. Rep., vol. 104, no. 499, EMCJ2004-114, pp. 71-76, Dec. 2004.
Paper # EMCJ2004-114 
Date of Issue 2004-12-03 (EMCJ) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee EMCJ  
Conference Date 2004-12-09 - 2004-12-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC Special Lecture by Guest Speakers from Asian Countries, etc. 
Paper Information
Registration To EMCJ 
Conference Code 2004-12-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A proposal of a parameter optimization algorithm for LECSS: EMC macro-modeling of IC/LSI power current 
Sub Title (in English)  
Keyword(1) EMC  
Keyword(2) IC/LSI power-supply model  
Keyword(3) LECCS  
Keyword(4) parameter optimization  
Keyword(5) algorithm  
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1st Author's Name Yohei Nomura  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Jun Kawashima  
2nd Author's Affiliation Okayama University (Okayama Univ.)
3rd Author's Name Nobuo Funabiki  
3rd Author's Affiliation Okayama University (Okayama Univ.)
4th Author's Name Toyohiro Toyota  
4th Author's Affiliation Okayama University (Okayama Univ.)
5th Author's Name Yuichirou Minamisawa  
5th Author's Affiliation Okayama University (Okayama Univ.)
6th Author's Name Osami Wada  
6th Author's Affiliation Okayama University (Okayama Univ.)
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Speaker Author-1 
Date Time 2004-12-10 15:40:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2004-114 
Volume (vol) vol.104 
Number (no) no.499 
Page pp.71-76 
#Pages
Date of Issue 2004-12-03 (EMCJ) 


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