Offset-Tolerant Design of Analog Chips for Independent Component Analysis

Ki-Seok CHO  Soo-Young LEE  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E87-C   No.8   pp.1382-1387
Publication Date: 2004/08/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electronic Circuits
Keyword: 
neurochip,  offset tolerance,  ICA,  blind signal separation,  

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Summary: 
An analog neurochip for independent component analysis (ICA) is designed with on-line learning capability. Due to the limited dynamic range of analog device, the nonholonomic ICA algorithm is adopted. In order to accommodate the offsets due to device mismatches, a modified algorithm is developed with 2-quadrant multipliers and self-adjusting biases. Performance of the developed system was demonstrated by Monte-Carlo simulation.