A Programmable CMOS Fuzzy Membership Function Generator

Abstract

This paper presents the architecture and circuit-level details related to hardware implementation of a programmable analog Membership Function Circuit (MFC). Its new architecture and modular approach makes it flexible and easy to expand. The proposed circuit has a wide dynamic input range (3.5 V) and can be modified in a way that the output of the circuit may be in single-ended or differential mode. In addition width, height, position and slope of generated membership functions are easily tunable. Brief tutorials of the circuits introduced by other papers are presented here for comparison. Simulation results are also given using HSPICE software in 0.5μm CMOS technology.

Indexing terms:

• Fuzzy membership function
• CMOS
• Differential pair

Additional information

Notes on contributors

M Takrimi

Manoochehr Takrimi was born in Urmia, Iran in 1971. He received his BS degree in Telecommunication Engineering from Tehran University in Tehran, Iran in 1993, his MS degree in telecommunication engineering from Isfahan University of Technology, Isafahan, Iran in 1995. Currently he is a PhD student in Electrical Engineering Department, Urmia University, Iran.

A Khoei

Abdollah Khoei was born in Urmia, Iran. He received BS, MS and PhD degrees in electrical engineering from Norht Dakota State University, USA, in 1982, 1985, 1989, respectively. His research interests are analog and digital integrated circuit design for fuzzy and neural network applications, fuzzy based industrial electronics, and DCDC converters for portable applications. He is currently with Electrical Engineering Department and Microelectronics Research Laboratory in Urmia University, Urmia, Iran.

Kh Hadidi

Khayrollah Hadidi received his BS degree fro Sharif University of Technology in Tehran, Iran, his MS degree from polytechnic University, New York, and PhD degree from University of California, Los Angeles, all in electrical engineering. His research interests are high—speed high—resolution data converter design, wideband integrated filter design, and non- linearity analysis and improvement in analog circuits. He is currently with Electrical Engineering Department and Microelectronics Research Laboratory in Urmia University, Urmia, Iran. He holds one US patent (issued), and one US plus 12 Japanese patents (pending).