A modular current-mode classifier circuit for template matching application

In this work, a current-mode Euclidean distance calculator circuit is proposed to play the role of a classifier. This classifier circuit is designed based on a subtracter circuit, an absoluter circuit, a squarer/divider circuit, and a square-rooter/multiplier circuit. The modular design of this classifier allows it to be easily extended for classification application with more input dimensions by doing some proper signal-scaling work due to the dynamic range limited by the square-rooter/multiplier circuit. This classifier circuit has been fabricated with a 0.6 /spl mu/m single-polysilicon double-metal CMOS process. Both simulation results and measurements of the implemented chip are presented to confirm the function of this classifier.

[1]  K. Bult,et al.  A class of analog CMOS circuits based on the square-law characteristic of an MOS transistor in saturation , 1987 .

[2]  Chien-Ming Huang,et al.  Current-mode multiple input maximum circuit for fuzzy logic controllers , 1994 .

[3]  Chun-Yueh Huang,et al.  A current-mode defuzzifier circuit to realize the centroid strategy , 1997, Proceedings of 1997 IEEE International Symposium on Circuits and Systems. Circuits and Systems in the Information Age ISCAS '97.

[4]  James C. Bezdek,et al.  Pattern Recognition with Fuzzy Objective Function Algorithms , 1981, Advanced Applications in Pattern Recognition.

[5]  R.F. Wassenaar,et al.  A wide-band technique for vector summation and RMS-DC conversion , 1984, IEEE Journal of Solid-State Circuits.

[6]  Chun-Yueh Huang,et al.  Current-mode linguistic hedge circuit for adaptive fuzzy logic controllers , 1995 .

[7]  Chun-Yueh Huang,et al.  Current-Mode Fuzzy Linguistic Hedge Circuits , 1999 .

[8]  Sergio Franco,et al.  Design with Operational Amplifiers and Analog Integrated Circuits , 1988 .

[9]  Chun-Yueh Huang,et al.  A Current-mode Circuit For Euclidean Distance Calculation , 1997, Proceedings of Technical Papers. International Symposium on VLSI Technology, Systems, and Applications.

[10]  Remco J. Wiegerink.  Analysis and Synthesis of Mos Translinear Circuits , 1993 .

[11]  Ramanathan Gnanadesikan,et al.  Methods for statistical data analysis of multivariate observations , 1977, A Wiley publication in applied statistics.

[12]  Eric A. Vittoz,et al.  CMOS selfbiased Euclidean distance computing circuit with high dynamic range , 1992 .

[13]  Richard O. Duda,et al.  Pattern classification and scene analysis , 1974, A Wiley-Interscience publication.

[14]  Bin-Da Liu,et al.  Current-mode defuzzifier circuit to realise the centroid strategy , 1997 .

[15]  Bin-Da Liu,et al.  Current-mode fuzzy linguistic hedge circuit-contrast intensification , 1996, 1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96.

[16]  Remco J. Wiegerink,et al.  Generalized translinear circuit principle , 1991 .

[17]  James M. Keller,et al.  A fuzzy K-nearest neighbor algorithm , 1985, IEEE Transactions on Systems, Man, and Cybernetics.

[18]  T. Su,et al.  A current-mode fuzzy linguistic hedge circuit-more or less , 1996, Proceedings of IEEE 5th International Fuzzy Systems.

[19]  Peter E. Hart,et al.  Nearest neighbor pattern classification , 1967, IEEE Trans. Inf. Theory.

[20]  Cheng-Chieh Chang,et al.  A CMOS square-law vector summation circuit , 1996 .