[Tex/LaTex] How to invert Logic Gate input in Circuitikz

circuitikzlogic

I have drawn the following circuit, but how could the inputs of a Logic Gate be inverted? (As in the scanned picture, but it does not matter which gate exactly, just generally)

\documentclass[a4paper,12pt]{article}

\usepackage{tikz} %vectorgraphics
\usetikzlibrary{shapes,arrows,shadows,
decorations.pathreplacing,backgrounds,calc} 
%graph/flowchart
\usepackage[siunitx]{circuitikz}

\begin{document}
\begin{circuitikz} \draw

(0,0) node[nand port] (nand1) {}
(3,0) node[nand port] (nand2) {}
(5,0) node[nand port] (nand3) {}

(3,2) node[nand port] (nand4) {}
(5,2) node[nand port] (nand5) {}

(3,4) node[nand port] (nand6) {}
(5,4) node[nand port] (nand7) {}

(0,4) node[nand port] (nand8) {}

(nand1.out) |- (nand2.in 2)
(nand2.out) -| node[circ,midway]{} (nand3.in 1)
(nand2.out) -| (nand3.in 2)

(nand8.out) |- (nand6.in 1)
(nand6.out) -| node[circ,midway]{} (nand7.in 2)
(nand6.out) -| (nand7.in 1)

(nand4.out) -| node[circ,midway]{} (nand5.in 2)
(nand4.out) -| (nand5.in 1)

(-2,1) node(B1)[anchor=east] {B}
(-2,1) -| node[circ,midway]{} (nand1.in 1) 
to[short,*-] (nand1.in 2)
(-2,1) -| (nand4.in 2)
(1,1) node[circ]{} |- (nand6.in 2)


(-2,3) node[anchor=east] {A}
(-2,3) -| node[circ,midway]{} (nand8.in 2) 
to[short,*-] (nand8.in 1)
(-2,3) -| (nand4.in 1)
(0.5,3) node[circ]{} |- (nand2.in 1)

(6,1.97) node[anchor=east] {O2}
(6,0.0) node[anchor=east] {O3}
(6,4) node[anchor=east] {O1}

;\end{circuitikz}

\end{document}

Best Answer

Using the fresh new circuitikzgit uploaded minutes ago, you can now do this:

\documentclass[border=10pt]{standalone}
\usepackage[siunitx, RPvoltages]{circuitikzgit}
\begin{document}
\begin{circuitikz}
    \draw (0,3) node[american and port] (A)  {P1};
    \node at (A.bin 1) [ocirc, left]{} ;
    \begin{scope}
        \ctikzset{tripoles/american or port/height=1.6}
        \draw (A.out) -- ++(0.5,0) node[american or port,
        number inputs=5, anchor=in 1] (B)  {P2};
        \node at (B.bin 3) [ocirc, left]{} ;
    \end{scope}
    \draw (0,1.5) node[american or port] (C)  {P3};
    \node at (C.bin 2) [ocirc, left]{} ;
    \draw (C.out) |- (B.in 2);
\end{circuitikz}
\end{document}

See: https://github.com/circuitikz/circuitikz/issues/166 and https://github.com/circuitikz/circuitikz/pull/168

Related Solutions

[Tex/LaTex] Complicated logic circuit drawing with Tikz – two input buffer gate

The problem with the labels in the operationals is that the point at which the label is centered is not at the right place. This can be easily spotted if you use a \bullet as label. It is not the "center" of the node either, as can be seen by drawing a red dot at (0,0):

\begin{circuitikz} 
\fill[red] (0,0) circle(2pt);
\draw (0,0) node[op amp] (opamp) {$\bullet$}
    (opamp.+) node[left] {$data\ ser\ p$}
    (opamp.-) node[left] {$data\ ser\ n$}
    (opamp.out) node[right] {$data\ ser$}
;\end{circuitikz}

Output

So, the best option is to place a new node containing the label, positioned relative to the center of the operational (the red dot in the figure above). The left side of the operational is at 10mm from the red dot, so you can put your label at (-9mm,0). Using the same amount in all your operationals ensures that all the inner labels are left aligned. The following code implements this idea:

\documentclass{article}
\usepackage{circuitikz}
\begin{document}

\tikzset{opamp label/.style={xshift=-9mm, font=\footnotesize,right}}
\begin{circuitikz} 
\draw
 (0,0) node[op amp] (opamp) {}
    (opamp.+)   node[left]        {$data\ ser\ p$}
    (opamp.-)   node[left]        {$data\ ser\ n$}
    (opamp.out) node[right]       {$data\ ser$}
    (opamp)     node[opamp label] {IBUFDS}

 (0,-3) node[op amp] (opamp) {}
    (opamp.+)   node[left]        {$clk\ in\ p$}
    (opamp.-)   node[left]        {$clk\ in\ n$}
    (opamp.out) node[right]       {$clk\ in$}
    (opamp)     node[opamp label] {IBUFGDS}
;
\end{circuitikz}
\end{document}

Resulting in:

Result

[Tex/LaTex] 3-input logic gate on circuitikz

\documentclass{minimal}
\usepackage{tikz}
\usetikzlibrary{circuits.logic.US,circuits.logic.IEC}
\begin{document}
    \begin{tikzpicture}[minimum height=0.75cm] 
        \node[or gate US, draw,logic gate inputs=nnn] (A) {}; 
        \foreach \a in {1,...,3}
            \draw (A.input \a -| -1,0) -- (A.input \a); 
        \draw (A.output) -- ([xshift=0.5cm]A.output);
    \end{tikzpicture}

    \begin{tikzpicture}[minimum height=0.75cm] 
        \node[and gate US, draw,logic gate inputs=nnn] (A) {}; 
        \foreach \a in {1,...,3}
            \draw (A.input \a -| -1,0) -- (A.input \a); 
        \draw (A.output) -- ([xshift=0.5cm]A.output);
    \end{tikzpicture}   

\end{document}

enter image description here

By slight modification of this code you can acheive gates with more inputs (modifying inputs=nnn and \foreach \a in {1,...,3}).

For more, check TikZ & PGF manual section 29.3 Page 300

Best Answer

Related Solutions

[Tex/LaTex] Complicated logic circuit drawing with Tikz – two input buffer gate

[Tex/LaTex] 3-input logic gate on circuitikz

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