Programmable Trapezoidal and Gaussian Membership Function Generator
Mohammadamin Daneshvar · 2011
This study focuses on generating various shapes of membership function circuit (MFC) with digital output. First a flash ADC has designed and then in order to generate digital output which can easily support digital environment, we applied this converter to the output of MFCs. Trapezoidal and Gaussian are more common shapes of MFCs. To obtain programmable trapezoidal shape and to achieve best performance, MFC and proposed digital conversion can be done contemporary. By changing some switches we can also generate programmable triangular shape, Z-shape, and S-shape. To obtain programmable Gaussian shape applicable in data classification, a simple MFC has been used. Compatible with digital circuit is great advantage of proposed circuits implemented in Current mode. Simulations in 0.35µm standard CMOS technology show the performance of circuits are given.