%!tikz editor 1.0
\documentclass{article}
\usepackage{pgf,tikz,pgfplots}

\usepackage{tkz-euclide}

\usetikzlibrary{angles, arrows.meta, quotes, calc, babel, fadings,quotes}

\usetikzlibrary{intersections,through,backgrounds}


\usepackage[graphics, active, tightpage]{preview}
\PreviewEnvironment{tikzpicture}

%!tikz preamble begin

%!tikz preamble begin
\pgfplotsset{compat=1.18}
%!tikz preamble begin

%!tikz preamble begin
\usepackage{circuitikz}
%!tikz preamble begin

%!tikz preamble end


\begin{document}
%!tikz source begin
\begin{tikzpicture}

 
% Circuit style
\ctikzset{
    logic ports=ieee,
    logic ports/scale=0.8,
%    logic ports/fill=lightgray
}

\node[nand port] (Nand) at (2,0){};
\node[not port] (Nota) at (0,1.2){};
\node[not port] (Notb) at (0,-1.2){};

\draw (Nota.in) node[left]{a};
\draw (Notb.in) node[left]{b}; 
\draw (Nota.out) node[right, xshift=1, yshift=-10]{nota};
\draw (Notb.out) node[right, xshift=1, yshift=10]{notb}; 
\draw (Nota.out) |- (Nand.in 1);
\draw (Notb.out) |- (Nand.in 2);
%\draw (Nand.in 1) -- ++( -0,0) node[near end,above]{a};
%\draw (Nand.in 2) -- ++(-0,0) node[near end,below]{b};
%\draw (Nand.out) -- ++(0.25,0) node[right]{};
\draw (Nand.out) node[right]{out};
%\draw (Nota.out) -- ++(0.25,0) node[right]{out};
%https://d1lvwzdke54ywg.cloudfront.net/computersystem-1/

\end{tikzpicture}
%!tikz source end

\end{document}