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%%
%% A DANTE-Edition example
%%
%% Example 33-04-4 on page 728.
%%
%% Copyright (C) 2011 Herbert Voss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\usepackage{sfg}
\begin{document}
\sfgsetunit{0.5cm}
\sfgsetsize{0.12}{0.4}{0.5}{0.3}
\sfgsetcompass
\begin{picture}(27,4) % branches related to node 2
\put(6,2){\sfgbranch{3}{0}\S{$\frac{1}{R_1}$}}
\put(9,2){\sfgbranch{3}{0}\N{\boldmath $Z_2$}}
\put(18,2){\sfgcurve{-9}{0}{2}\S{$\frac{1}{R_2}$}}
\put(24,2){\sfgcurve{-15}{0}{-2}\N{$sC_1$}} % branches related to node 3
\put(12,2){\sfgbranch{3}{0}\N{$\frac{1}{R_2}$}}
\put(15,2){\sfgbranch{3}{0}\N{\boldmath $Z_3$}}
\put(0,2){\sfgcurve{6}{0}{2}\N{$1$}}% input, voltage gain, output
\put(18,2){\sfgcurve{6}{0}{-2}\S{$\alpha_{\mathrm{V}}$}}
\put(24,2){\sfgbranch{3}{0}\S{$1$}}
\put(0,2){\sfgtermnode\S{$V_{\mathrm{in}}$}} % nodes
\put(3,2){\sfgnode\S{$I_1$}}
\put(6,2){\sfgnode\S{$V_1$}}
\put(9,2){\sfgnode\S{$I_2$}}
\put(12,2){\sfgnode\S{$V_2$}}
\put(15,2){\sfgnode\S{$I_3$}}
\put(18,2){\sfgnode\S{$V_3$}}
\put(21,2){\sfgnode\S{$I_4$}}
\put(24,2){\sfgnode\S{$V_4$}}
\put(27,2){\sfgtermnode\S{$V_{\mathrm{out}}$}}
\end{picture}
\end{document}
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