[Tex/LaTex] Draw a circle node with a cross symbol inside it to resemble a multiplier of a signal modulator

Question

How do I do this in TikZ:

I want to draw a circular node with a cross in it to resemble a multiplier like in the diagram shown in the link below. I can draw a circle but I don't know how to put the cross inside.

Answer 1

\documentclass{scrartcl}
\usepackage{tikz} 

\begin{document}
\begin{tikzpicture}[cross/.style={path picture={ 
  \draw[black]
(path picture bounding box.south east) -- (path picture bounding box.north west) (path picture bounding box.south west) -- (path picture bounding box.north east);
}}]

 \node [draw](A){start};
 \node [draw,circle,cross,minimum width=1 cm](B) at (3,0){}; 
  \node [draw](C) at( 5,0){end}; 
\draw[->] (A) -- (B) -- (C);

\end{tikzpicture}

\end{document}