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Offset-Tolerant Design of Analog Chips for Independent Component Analysis
Ki-Seok CHO Soo-Young LEE
IEICE TRANSACTIONS on Electronics
Publication Date: 2004/08/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electronic Circuits
neurochip, offset tolerance, ICA, blind signal separation,
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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.