1.5V Fully Programmable CMOS Membership Function Generator Circuit with Proportional DC-Voltage Control

A Membership Function Generator Circuit (MFGC) with bias supply of 1.5 Volts and independent DCvoltage programmable functionalities is presented. The realization is based on a programmable differential current mirror and three compact voltage-to-current converters, allowing continuous and quasi-linear adjustment of the center position, height, width and slopes of the triangular/trapezoidal output waveforms. HSPICE simulation results of the proposed circuit using the parameters of a double-poly, three metal layers, 0.5 μm CMOS technology validate the functionality of the proposed architecture, which exhibits a maximum deviation of the linearity in the programmability of 7 %.