OpenAccess Logo with TikZ

\documentclass{minimal}
\usepackage[utf8]{inputenc}
\usepackage{tikz}

\newlength{\OAheight}
\newcommand{\OA}[1]{% symbol height
  \setlength{\OAheight}{#1}%
  \raisebox{-0.40\OAheight}{\resizebox{\OAheight}{!}{%
      \definecolor{OA}{HTML}{f68212}
      \begin{tikzpicture}[x=1pt,y=1pt]
        \begin{scope}[draw=OA,line width=10pt]
          \draw (10,68) -- (10,72) arc (180:0:21) -- (52,46);
          \draw (31,31) circle (26);
        \end{scope}
        \path[fill=OA](31,31)circle(8.8);
      \end{tikzpicture}
  }}%
}

\begin{document}
{\sffamily OPEN\,\OA{0.84em}\,ACCESS}
\end{document}