Document Classes ⇒ Node Coordinates in Circuits

[Jaraqui]

Hi,

please consider the following code:

Code: Select all

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{circuits.logic.US}

\begin{document}
  \begin{tikzpicture}[circuit logic US]
    \matrix[column sep=7mm] {
      \node (i0) {a}; & \node [not gate] (not1) {}; &                             \\
      \node (i1) {b}; &                             & \node [and gate] (and1) {}; \\
                      & \node [nor gate] (nor1) {}; &                             \\
      \node (i2) {c}; &                             &                             \\
    };

    \draw     (i0.east)    -- (not1.input);
    \draw     (i1.east) -- ++ (right: 3mm) |- (nor1.input 1);
    \draw     (i2.east) -- ++ (right: 3mm) |- (nor1.input 2);
    \draw (not1.output) -- ++ (right: 3mm) |- (and1.input 1);
    \draw (nor1.output) -- ++ (right: 3mm) |- (and1.input 2);
    \draw (and1.output) -- ++ (right: 3mm);

    \node at (0.7, 1.05) {a'};
    \node at (0.8,-0.8) {(b+c)'};
    \node at (2.9, 0.15) {a(b+c)'};
  \end{tikzpicture}
\end{document}

I am trying to express the coordinates of the last three \node commands in such a form that they can be related to the nodes in the matrix (likewise the \draw commands).

Is it possible? If 'yes', how?

Regards

[localghost]

Very good MWE!

You can position nodes relatively to coordinates of intermediate points in paths. For your example it could look like this.

Code: Select all

\documentcFass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage{tikz}
\usetikzlibrary{circuits.logic.US}

\begin{document}
  \begin{tikzpicture}[circuit logic US]
    \matrix[column sep=7mm] {
      \node (i0) {a}; & \node[not gate] (not1) {}; &                            \\
      \node (i1) {b}; &                            & \node[and gate] (and1) {}; \\
                      & \node[nor gate] (nor1) {}; &                            \\
      \node (i2) {c}; &                            &                            \\
    };

    \draw (i0.east) -- (not1.input);
    \draw (i1.east) -- ++ (right: 3mm) |- (nor1.input 1);
    \draw (i2.east) -- ++ (right: 3mm) |- (nor1.input 2);
    \draw (not1.output) -- ++ (right: 3mm) node[above right=-2pt] {a'} |- (and1.input 1);
    \draw (nor1.output) -- ++ (right: 3mm) node[below right=-2pt] {(b+c)'} |- (and1.input 2);
    \draw (and1.output) -- ++ (right: 3mm) node[right] {a(b+c)'};
  \end{tikzpicture}
\end{document}

For details please refer to the PGF/TikZ manual.


Thorsten

[Jaraqui]

Perfect!

Thank You!