[Tex/LaTex] multiple inputs for logic gates

circuitikz

In the manual , section 5.1.1 Logical ports

All logical ports, except not, have two inputs and one output.

It seems the inputs are limited to two. All solutions I've found are using or gate US rather than american nor port which the command in the new update. In my case, I need to add three inputs to my following case,

\documentclass[border={10pt}]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning}
\usepackage[siunitx,european,american]{circuitikz}
\usetikzlibrary{circuits.logic.US,circuits.logic.IEC}
\begin{document}
\begin{tikzpicture}
    [%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
        block/.style={fill=blue!20,draw=red!70,thick,minimum width=3cm,minimum height=3.5cm}
    ]%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\draw (0,0)
  node[block] (P1) {block} 
  ($(P1.north)$) coordinate (P1n)
  ($(P1.south)$) coordinate (P1s)
  ($(P1.east)$)  coordinate (P1e)
  (P1n) to[short,-o] ++(0, .2) coordinate (p1n) node[left] {$p1$}
  (P1s) to[short,-o] ++(0,-.2) coordinate (p1s) node[left] {$p2$}
  (P1e) to[short,-o] ++(0,0) coordinate (p1e) node[left]   {$p3$}
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  (P1) ++(4,0)  node[american nor port] (And1) {}
  (p1n) -|  (And1.in 1) (p1s) -| (And1.in 2); 

\end{tikzpicture}
\end{document}

Best Answer

You are right. Some of the anchor points for this component are in odd locations.

\documentclass[border={10pt}]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning}
\usepackage[siunitx,european,american]{circuitikz}
\usetikzlibrary{circuits.logic.US,circuits.logic.IEC,calc}
\begin{document}
\begin{tikzpicture}
    [%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
        block/.style={fill=blue!20,draw=red!70,thick,minimum width=3cm,minimum height=3.5cm}
    ]%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\draw (0,0)
  node[block] (P1) {block} 
  ($(P1.north)$) coordinate (P1n)
  ($(P1.south)$) coordinate (P1s)
  ($(P1.east)$)  coordinate (P1e)
  (P1n) to[short,-o] ++(0, .2) coordinate (p1n) node[left] {$p1$}
  (P1s) to[short,-o] ++(0,-.2) coordinate (p1s) node[left] {$p2$}
  (P1e) to[short,-o] ++(0,0) coordinate (p1e) node[left]   {$p3$}
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  (P1) ++(4,0)  node[american nor port] (And1) {}
  (p1n) -|  (And1.in 1) (p1s) -| (And1.in 2)
  (P1e) -- ($(And1.west)!0.33!(And1.east)$);

\end{tikzpicture}
\end{document}

Related Solutions

[Tex/LaTex] Colorful Logic Gates using Circuitikz

The diagram would be improved alot by using connecting wires that are only horizontal or vertical. There is a conveient syntax |- for a path that is first vertical then horizontal, and the corresponding -|. You can apply colours to the individual symbols and to the connecting wires by specifying color=red. Perhaps this is close to what you are after:

Sample output

\documentclass{beamer}
\usepackage{circuitikz}
\begin{document}
\begin{frame}
\begin{figure}
\centering
\begin{circuitikz} \draw
(0,0) node[not port] (not1) {}
(0,2) node[xor port] (xor1) {}
(0,4) node[and port] (and1) {}
(2,3) node[nor port,color=red] (nor1) {}
(4,1) node[xor port,color=red] (xor2) {}
(6,3) node[or port,color=red] (or1) {}
(6,1) node[and port] (and2) {}
(nor1.in 1) node[above](f) {U}
(nor1.in 2) node[below](g) {U}
(xor2.in 1) node[left](h) {U}
(xor2.in 2) node[left](i) {U}
(or1.out) node[right](j) {U};
\draw[color=red] (and1.out) |- (nor1.in 1)
(xor1.out) |- (nor1.in 2)
(nor1.out) -| (xor2.in 1)
(not1.out) -| (xor2.in 2)
(xor2.out) |- (or1.in 2);
\draw 
(and1.out) -- +(4,0) |- (or1.in 1)
(xor1.out) -| (and2.in 1)
(not1.out) -| (and2.in 2);
\end{circuitikz}
\end{figure}
\end{frame}
\end{document}

As the symbols are one unit, you can not (easily) change the colour an input wire right up to the symbol body.

[Tex/LaTex] CircuiTikZ logic gates alignment

Like this?

\documentclass[border=5]{standalone}
\usepackage{circuitikz}
\begin{document}
     \begin{circuitikz}
        \draw (0,0) node[xor port](xor1) {} to
        (2,0) node[scale=1.2,nand port,anchor=in 1] (nand1) {}
        (nand1.in 2) -- (xor1.in 2|-nand1.in 2)
     ;\end{circuitikz}
\end{document}

enter image description here

With another gate:

\documentclass[border=5]{standalone}
\usepackage{circuitikz}
\begin{document}
     \begin{circuitikz}
        \draw (0,0) node[xor port](xor1) {} to
        (2,0) node[scale=1.2,nand port,anchor=in 1] (nand1) {}
        (nand1.out) to +(2,0) node[scale=1.3,xor port,anchor=in 1] (xor2) {}    %% 3rd gate
        (nand1.in 2) -- (xor1.in 2|-nand1.in 2)
        (xor2.in 2) -- (xor1.in 2|-xor2.in 2)
     ;\end{circuitikz}
\end{document}

enter image description here

Actually you don't have to align them as it is possible to connect them easily.

\documentclass[border=5]{standalone}
\usepackage{circuitikz}
\begin{document}
     \begin{circuitikz}
        \draw (0,0) node[xor port](xor1) {}
        (2,-1) node[nand port] (nand1) {}
        (xor1.out) -| (nand1.in 1)    %% connect them
        (nand1.in 2) -- +(-2,0)
     ;\end{circuitikz}
\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Colorful Logic Gates using Circuitikz

[Tex/LaTex] CircuiTikZ logic gates alignment

Related Question