\chapter{Modeling the Hopfield Network}
\begin{figure}
\vspace{4.5in}
\special{bmp:c:/mybook/hopfi_1.bmp x=6in y=4.5in}
\caption{Hopfield neural network model.}
\label{fig:hopfi_1}
\end{figure}
\begin{figure}
\vspace{3.5in}
\hskip1in\special{bmp:c:/mybook/hopfi_2.bmp x=4.67in y=3.5in}
\caption{Model of a neuron in the Hopfield neural network.}
\label{fig:hopfi_2}
\end{figure}
\begin{figure}
\vspace{4.5in}
\special{bmp:c:/mybook/hopfi_3.bmp x=6in y=4.5in}
\caption{A circuit realization of the Hopfield neural network.}
\label{fig:hopfi_3}
\end{figure}
\begin{figure}
\vspace{3.5in}
\hskip.75in\special{bmp:c:/mybook/hopfi_4.bmp x=4.67in y=3.5in}
\caption{Equivalent representation of a single node in the circuit realization of the Hopfield neural network.}
\label{fig:hopfi_4}
\end{figure}