Increasing number of ports in circuitikz gate

Question

Is it possible to add two ports to the gates (nand, and, or, not) in circuitikz on the top and bottom for reference voltages in a similar fashion to how they exist for the op amp?

Answer 1

You can use the same mechanism given for op-amps in the manual by defining your own ports

\documentclass{article}
\usepackage{circuitikz,siunitx}
\begin{document}
\begin{circuitikz} 
\draw (0,0) node[op amp] (opamp) {}
 (opamp.+) node[ left ] {$v_+$}
 (opamp.-) node[left] {$v_-$}
 (opamp.out) node[right] {$v_o$}
 (opamp.down) node[ground] {}
 (opamp.up) ++ (0,.5) node[above] {\SI{12}{\volt}}
 -- (opamp.up)
;
\draw (4,0) node[european and port] (euand) {} 
(euand.south) node[ground] {}
(euand.north) ++(0,0.5) node[above] {\SI{12}{\volt}}
-- (euand.north);
\end{circuitikz}
\end{document}