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% Drawing generated by LaTeX-CAD 1.9 - requires latexcad.sty
% (c) 1998 John Leis leis@usq.edu.au
\begin{picture}(112,40)%(112,40)
\thinlines
\Large
\drawframebox{65.0}{30.0}{38.0}{12.0}{$\frac{s+1}{s^2+4s+3}$}
\drawframebox{62.0}{9.0}{24.0}{10.0}{H(s)}
\drawpath{7.0}{30.0}{23.0}{30.0}
\drawcenteredtext{26.0}{30.0}{\Huge$\otimes$}
\drawpath{29.0}{30.0}{46.0}{30.0}
\thicklines
\drawvector{84.0}{30.0}{24.0}{1}{0}
\thinlines
\drawpath{96.0}{8.0}{96.0}{30.0}
\thicklines
\drawvector{96.0}{8.0}{22.0}{-1}{0}
\thinlines
\drawpath{50.0}{8.0}{26.0}{8.0}
\drawvector{26.0}{8.0}{19.0}{0}{1}
\drawcenteredtext{10.0}{34.0}{$R(s)$}
\drawcenteredtext{22.0}{34.0}{$+$}
\drawcenteredtext{22.0}{26.0}{$-$}
\end{picture}
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