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+%% 
+%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
+%% 
+%%  Example 8-6-7 on page 581.
+%% 
+%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
+%% 
+%%  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.
+%% 
+
+\documentclass{ttctexa}
+\pagestyle{empty}
+\setcounter{page}{6}
+\setlength\textwidth{135.83385pt}
+\StartShownPreambleCommands
+\usepackage[basic]{circ}
+\StopShownPreambleCommands
+\begin{document}
+\begin{circuit}{0}
+\npn1 {?} B l    % draw npn transistor
+\frompin npn1C   % draw from collector
+\- 1 u           % a little wire up
+\nl\A1 {$I_C$} u % A-meter for collector current
+\atpin npn1B     % next draw from base
+\- 1 l           % a little wire left
+\R1 {510 k$\Omega$} l  % place resistor on base
+\- 1 l           % add little wire left
+\centerto A1     % align centered on first A-meter
+\nl\A2 {$I_B$} u % draw second A-meter
+\frompin A2b     % connect second A-meter to
+\vtopin R1l      % resistor
+\frompin A1t
+\- 1 u \.1       % connection point
+\frompin A2t
+\vtopin .1
+\htopin .1       % connect second A-meter to 1.
+\- 1 u \cc\connection1
+    {$U_b$} c u  % connect to voltage
+\frompin npn1E   % connect emitter to
+\- 1 d  \GND1    % ground
+\end{circuit}
+\end{document}