Xor in Tex -- noch nicht fertig

TeX/Xor.tex

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+%!tikz editor 1.0
+\documentclass{article}
+\usepackage{tikz}
+\usepackage[graphics, active, tightpage]{preview}
+\usepackage{circuitikz}
+\PreviewEnvironment{tikzpicture}
+
+%!tikz preamble begin
+\usetikzlibrary{circuits.logic.IEC, positioning}
+\usepackage[utf8]{inputenc}
+
+
+\makeatletter
+\def\grd@save@target#1{%
+  \def\grd@target{#1}}
+\def\grd@save@start#1{%
+  \def\grd@start{#1}}
+\tikzset{
+  grid with coordinates/.style={
+    to path={%
+      \pgfextra{%
+        \edef\grd@@target{(\tikztotarget)}%
+        \tikz@scan@one@point\grd@save@target\grd@@target\relax
+        \edef\grd@@start{(\tikztostart)}%
+        \tikz@scan@one@point\grd@save@start\grd@@start\relax
+        \draw[minor help lines] (\tikztostart) grid (\tikztotarget);
+        \draw[major help lines] (\tikztostart) grid (\tikztotarget);
+        \grd@start
+        \pgfmathsetmacro{\grd@xa}{\the\pgf@x/1cm}
+        \pgfmathsetmacro{\grd@ya}{\the\pgf@y/1cm}
+        \grd@target
+        \pgfmathsetmacro{\grd@xb}{\the\pgf@x/1cm}
+        \pgfmathsetmacro{\grd@yb}{\the\pgf@y/1cm}
+        \pgfmathsetmacro{\grd@xc}{\grd@xa + \pgfkeysvalueof{/tikz/grid with coordinates/major step}}
+        \pgfmathsetmacro{\grd@yc}{\grd@ya + \pgfkeysvalueof{/tikz/grid with coordinates/major step}}
+        \foreach \x in {\grd@xa,\grd@xc,...,\grd@xb}
+        \node[anchor=north] at (\x,\grd@ya) {\pgfmathprintnumber{\x}};
+        \foreach \y in {\grd@ya,\grd@yc,...,\grd@yb}
+        \node[anchor=east] at (\grd@xa,\y) {\pgfmathprintnumber{\y}};
+      }
+    }
+  },
+  minor help lines/.style={
+    help lines,
+    step=\pgfkeysvalueof{/tikz/grid with coordinates/minor step}
+  },
+  major help lines/.style={
+    help lines,
+    line width=\pgfkeysvalueof{/tikz/grid with coordinates/major line width},
+    step=\pgfkeysvalueof{/tikz/grid with coordinates/major step}
+  },
+  grid with coordinates/.cd,
+  minor step/.initial=.2,
+  major step/.initial=1,
+  major line width/.initial=1pt,
+}
+\makeatother
+%!tikz preamble end
+
+
+\begin{document}
+%!tikz source begin
+\begin{tikzpicture}[scale=1.3, transform shape,circuit logic IEC]
+
+\tikzstyle{branch}=[fill,shape=circle,minimum size=3pt,inner sep=0pt]
+
+ 	%\draw (0,0) to[grid with coordinates] (10,5);
+
+	% Koordinaten für Kreuzpunkte
+	\coordinate (A) at (0.95,2.75);
+	\fill (A) circle (1pt);
+	\coordinate (B) at (0.95,0.5);
+	\fill (B) circle (1pt);
+
+	\coordinate (C) at (0.55,2.75);
+	\fill (C) circle (1pt);
+	
+	\coordinate (D) at (2.5,1.4);
+	
+	\coordinate (E) at (0.75,0.5);
+	\fill (E) circle (1pt);
+	
+	\coordinate (F) at (2.5,1.8);
+	
+	% Eingangsvariablen
+	\node (x2) at (0.2,0.5) {b};
+	\node (x1) at (0.2,2.75) {a};
+		
+	% Ausgangsvariable
+	\node (y) at (5,0.5) {out};
+	
+	% Gatter
+	\node[nand gate] at (1.5,0.5) (n1) {};
+	\node[nand gate] at (1.5,2.75) (n2) {};
+	\node[nand gate] at (3.45,2.58) (n4) {};
+	\node[nand gate] at (3.45,0.666) (n3) {};
+	\node[nand gate] at (5,1.6) (n5) {};	
+	
+	% Verbindungen
+	
+	\draw(x1) --  (A);
+	\draw(x2) --  (B);	
+	\draw(A) |- (n2.input 1);
+	\draw(A) |- (n2.input 2);
+	\draw(B) |- (n1.input 1);
+	\draw(B) |- (n1.input 2);
+	\draw(n1.output) -- (n3.input 2);
+	\draw(n2.output) -- (n4.input 1);
+	\draw(C) |- (D);
+	\draw(D) |- (n3.input 1);
+	\draw(E) |- (F);
+	\draw(F) |-	(n4.input 2);
+	\draw(n4.output) --	(n5.input 1);
+%	\draw(n1.output) --  (A);	
+%	\draw(A) |- (n2.input 2);
+%	\draw(A) |- (n2.input 1);
+%	\draw(n2.output) -- (y);
+%   \draw(n1.output) to [short,l=\footnotesize{nandout}, -] (A);
+   
+\end{tikzpicture}
+%!tikz source end
+
+\end{document}