Telecommunications and Radio Engineering

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A VLSI Analog Adaptive Filter Using Fuzzy Logic Adaptation

Alejandro Diaz-Mendez, Dr. Sci.
SEPI ESIME Culhuacan National Polytechnic Institute (IPN), Av. Santa Ana No. 1000, C.P. 04430 Mexico D.F. MEXICO

Hector Manuel Perez-Meana
National Polytechnic Institute of Mexico, Mexico

Juan Carlos Sanchez-Garcia
SEPI ESIME Culhuacan, National Polytechnic Institute (IPN), Av. Santa Ana No. 1000, C.P. 04430 Mexico D.F. MEXICO

Gonzalo Duchen Sanchez
ESME-IPN Unidad Culhuacan, Av. Santa Ana 1000, Col. San Francisco Culhuacan Mexico 04430 D.F.

ABSTRACT

A structure for analog adaptive filtering in VLSI, designed in current-mode, is presented. The filtering is performed by a discrete time structure, and the adaptation is performed using a fuzzy structure in continuos time. This circuit can be designed in a standard 0.8μm CMOS process. The simulation results show that the fuzzy filter implemented in order to approximate the output of the unknown system, has a well performance in terms of the error and convergence rate.