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Advances in Fuzzy Systems
Volume 2012, Article ID 419370, 8 pages
Research Article

A Novel Programmable CMOS Fuzzifiers Using Voltage-to-Current Converter Circuit

Department of Electronics and Communication Engineering, PA College of Engineering, Karnataka, Mangalore 574153, India

Received 27 April 2012; Accepted 21 May 2012

Academic Editor: Oscar Castillo

Copyright © 2012 K. P. Abdulla and Mohammad Fazle Azeem. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents a new voltage-input, current-output programmable membership function generator circuit (MFC) using CMOS technology. It employs a voltage-to-current converter to provide the required current bias for the membership function circuit. The proposed MFC has several advantageous features. This MFC can be reconfigured to perform triangular, trapezoidal, S-shape, Z-Shape, and Gaussian membership forms. This membership function can be programmed in terms of its width, slope, and its center locations in its universe of discourses. The easily adjustable characteristics of the proposed circuit and its accuracy make it suitable for embedded system and industrial control applications. The proposed MFC is designed using the spice software, and simulation results are obtained.