A Naderi - Microelectronics Research Laboratory, Urmia University
A .Khoei - Microelectronic research labratory of urmia university
Khairollah Hadidi - Microelectronic research labratory of urmia university

In this paper a new CMOS current-mode four-quadrant analog multiplier based on squarer circuit is proposed which is applicable for realization the Center-of-Gravity defuzzification strategy. The major advantages of this work are low power consumption, high speed and high precision. Current mode realization of the circuits leads to simple configurations. The circuit is designed and simulated using HSPICE simulator by level 49 parameters (BSIM3v3) in 0.35μm standard CMOS technology. The simulation results of defuzzifier demonstrate a linearity error of 1.1%, a THD of 0.97% in 1MHz, a -3dB bandwidth of 41.8MHz and a maximum power consumption of 0.34mW.

Simplified centroid strategy, CMOS multiplier, Defuzzifier circuit, Fuzzy logic, Squarer circuit