![使用 circuitikz 的电路](https://linux22.com/image/411598/%E4%BD%BF%E7%94%A8%20circuitikz%20%E7%9A%84%E7%94%B5%E8%B7%AF.png)
\begin{figure}[h]
\centering
\begin{circuitikz}
\draw [-o](0.25,4)--(0,4)node[left]{$V_i(t)$};
\draw (0.25,4)to[R,l=$R_1$, a={{3,456}{$\Omega$}},-*](4,4)to[C,-*,l2^=$C_1$
and {1}{$\mu F$}](4,0)node[ground](GND){};
\draw [-o](4,0)--(0,0)node[left]{$-$};
\draw [-o](4,4)--(6,4)node[right]{$V_o(t)$};
\draw [-o](4,0)--(6,0)node[right]{$-$};
\end{circuitikz}
\caption{Filtro Pasabajo}
\end{figure}
请帮帮我!谢谢。
答案1
第一张图片:
\documentclass[margin=3mm]{standalone}
\usepackage{circuitikz}
\begin{document}
\begin{circuitikz}
\draw (0,2) to[R=$R$,o-*] (3,2)
to[short, -o] (5,2)
(3,2) to[C=$C$, -*] (3,0)
node[ground,below] {}
(0,0) node[ground,below] {}
(5,0) node[ground,below] {}
(0,0) to[open, v^=$v_i(t)$, o-] (0,2)
(5,0) to[open, v_=$v_o(t)$, o-] (5,2);
\end{circuitikz}
\end{document}
附录: 第二张图片:
\documentclass[margin=3mm]{standalone}
\usepackage{circuitikz}
\begin{document}
\begin{circuitikz}
\draw (0,2) to[R=$R$,o-*] (3,2)
to[short, -o] (5,2)
(3,2) to[C=$C$, -*] (3,0)
(0,0) to[short,o-o] (5,0)
(3,0) node[ground,below] {}
(0,2) node[left] {$V_i(t)$}
(0,0) node[left] {$-$}
(5,2) node[right] {$V_o(t)$}
(5,0) node[right] {$-$};
\end{circuitikz}
\end{document}