Digital hardware implementation of sigmoid function and its derivative for artificial neural networks
Hassene Faiedh, Zied Gafsi, Kamel Besbes · 2001
In this paper we propose a polynomial approximation of the sigmoid activation function and its derivative used in artificial neural networks, and we describe the design of the equivalent digital circuit using a floating-point representation for numbers. The simulation of the circuit realized with CMOS technology AMS 0.35/spl mu/m under a frequency of 300 MHz shows the efficiency of the implementation.