Sigmoid函数及其导函数的FPGA实现

Implementation of Sigmoid Function and Its Derivative on FPGA

通过对Sigmoid函数进行分析,构造一张自变量在[0,4],函数值在[0.5,1.0]的查找表,将其与设计的运算模块相连,实现Sigmoid函数及其导函数.实验表明,该方法在确保快速运算的同时节省了芯片的资源.

It has,based on ananlysis of Sigmoid function and constructing a look-up table whose variables are in ,function value in [0.5,1.0],implemented the Sigmoid function and its derivative by connecting with the arithmetic module.Experimently,this method can effectively save resources when ensuring rapid computing.