Title :
Current-mode circuit to realize fuzzy classifier with maximum membership value decision
Author :
Chen, Chuen-Yau ; Tsao, Ju-Ying ; Liu, Bin-Da
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
A current-mode circuit to realize a fuzzy classifier is proposed in this paper. It is composed of two principal building blocks including the Euclidean distance calculator and the membership degree calculator. This classifier circuit is designed in modular methodology for easy expansion. To consider the proposed circuit more practically, the nonideal effects, such as body effect, channel length modulation, and device matching problem are also discussed. This classifier has been simulated with HSPICE in level 28 model and fabricated with 0.6 μm single-polysilicon-double-metal CMOS process. The experimental results are in agreement with the simulation results. The hardware realization allows this classifier to operate in parallel rather than in serial as software-level verification does
Keywords :
CMOS logic circuits; SPICE; fuzzy systems; logic CAD; pattern classification; 0.6 mum; Euclidean distance calculator; HSPICE; Si; VLSI; absoluter; body effect; channel length modulation; classifier circuit; current-mode circuit; device matching; divider; fuzzy classifier; membership degree calculator; modular methodology; multiplier; simulation; single-polysilicon-double-metal CMOS; software-level verification; square rooter; squarer; subtracter; Classification algorithms; Current mode circuits; Euclidean distance; Fuzzy logic; Fuzzy set theory; Hardware; Humans; Prototypes; Uncertainty; Very large scale integration;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.703993
