comparatore-4-bit.tex

\documentclass{standalone}
\usepackage{circuitikz} 
\begin{document}
\begin{circuitikz}
    \ctikzset{logic ports=ieee}   
    \draw
    node[xor port](a)at(0,4.5){}
    node[xor port](b)at(0,3){}
    node[xor port](c)at(0,1.5){}
    node[xor port](d)at(0,0){}

    node[nor port, number inputs=4](g)at(2.5,2.25){}
    (a.out)to[short](g.in 1)
    (b.out)to[short](g.in 2)
    (c.out)to[short](g.in 3)
    (d.out)to[short](g.in 4)

    (a.in 1)to[short,-o]++(-0.5,0)node[left]{$\mathrm{A}_0$}
    (a.in 2)to[short,-o]++(-0.5,0)node[left]{$\mathrm{B}_0$}
    (b.in 1)to[short,-o]++(-0.5,0)node[left]{$\mathrm{A}_1$}
    (b.in 2)to[short,-o]++(-0.5,0)node[left]{$\mathrm{B}_1$}
    (c.in 1)to[short,-o]++(-0.5,0)node[left]{$\mathrm{A}_2$}
    (c.in 2)to[short,-o]++(-0.5,0)node[left]{$\mathrm{B}_2$}
    (d.in 1)to[short,-o]++(-0.5,0)node[left]{$\mathrm{A}_3$}
    (d.in 2)to[short,-o]++(-0.5,0)node[left]{$\mathrm{B}_3$}

    (g.out)to[short,-o]++(0.5,0)node[above]{A$\equiv$B}
    ;
\end{circuitikz}
\end{document}