VLSI Implementation of Fuzzy Adaptive Resonance and Learning Vector Quantization

  • Authors:
  • Jeremy Lubkin;Gert Cauwenberghs

  • Affiliations:
  • Electrical and Computer Engineering, Johns Hopkins University, Baltimore MD 21218;Electrical and Computer Engineering, Johns Hopkins University, Baltimore MD 21218

  • Venue:
  • Analog Integrated Circuits and Signal Processing
  • Year:
  • 2002

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Abstract

We present a mixed-mode VLSI chip performing unsupervised clustering and classification, implementing models of Fuzzy Adaptive Resonance Theory (ART) and Learning Vector Quantization (LVQ), and extending to variants such as Kohonen Self-Organizing Maps (SOM). The parallel processor classifies analog vectorial data into a digital code in a single clock, and implements on-line learning of the analog templates, stored locally and dynamically using the same adaptive circuits for on-chip quantization and refresh. The unit cell performing fuzzy choice and vigilance functions, adaptive resonance learning and long-term analog storage, measures 43 μm×43 μm in 1.2 μm CMOS technology. Experimental learning results from a fabricated 8-input, 16-category prototype are included.