我有以下circuitikz代码
\begin{figure}[h]
\resizebox{250pt}{100pt}{
\begin{circuitikz}[american]
\draw (0,0) [vsource,l=$0V$,xshift=10pt] to [short] (6.5,0);
\draw (1,0) to [sV, o-o, l=$Vin$] (1,3) % White noise source
to [short] +(0,1)
to [short] +(1,0)
to [european resistor,l=$R_1$] +(0,-2)
to [european potentiometer,l=$R_{SPI2}$] +(0,-1)
to [short] +(0,-1)
;
% wiper R_{SPI2}
\draw (2.6,2.3) to [short,-o] (2.6,1.5);
\draw (3.5,4) to [C,l=$C$] (3.5,2.3)
to [short] (3.5,3)
;
\draw (5,4) to [short] +(0,-0.3)
to [european potentiometer,l=$R_{SPI1}$] +(0,-1);
\draw (5,2.6) to [short] (5,2.3);
%wiper R_{SPI1}
\draw (5.5,4) to [short,-o] (5.5,3.22);
\draw (2,4) to [short] (3.5,4);
\node[draw,circle,blue] (A) at (9,2.3) {$FFT2$};
\draw [short,o-,blue] (8,2.3) to [short,-o] (2.0,2.3);
\node[draw,circle,blue] (A) at (9,4) {$FFT1$};
\draw [short,o-,blue] (8,4) to [short] (3.0,4.0)
%to [short,-o] (15.0,3.0);
;
\end{circuitikz}
} % resize box
\caption{
Blah blah blah impedance.
}
\label{fig:tds_wl_detector}
\end{figure}
在 Ubuntu 22.04 安装中，它提供
在较旧的 20.04 Ubuntu 上，它（似乎正确）给出
我是不是在使用时做了一些未定义的事情circuitikz？它们渲染的方式不同，这看起来很奇怪。
答案1
让我们从第一行开始：
\draw (0,0) [vsource,l=$0V$,xshift=10pt] to [short] (6.5,0);
语法不正确，并且从未得到支持，因此行为未定义。必须指定 path-style 元素里面命令，因此语法为：
\draw (coordinate 1) to[...whatever...] (coordinate 2);
...实际上，你没有vsource在任何地方标注 $0V$。我不知道你的意图是什么，所以我只能猜测一下。
然后，我认为你搞错了相对+()样式坐标。它们指定了一个相对坐标，是的，但它们不会移动当前点...我想你指的是语法++()。
最后，您不能像现在这样猜测距离；您必须学会使用正交和命名坐标。例如，要连接到雨刮器，您需要给电位计命名，然后才能使用锚点...name.wiper。例如：
\draw (2.6,2.3) to [short,-o] (2.6, 2.3 |- rspi2.wiper) -- (rspi2.wiper);
意思是：从 出发(2.6,2.3)；然后带着一个元素走到垂直位置为、水平坐标为short的点，添加一个极点；然后继续(2.6,2.3)(rspi2.wiper)(rspi2.wiper)。确切地雨刮器位置。
此外，一般来说，使用默认尺寸，电阻器无法在 1cm 内容纳；我不想改变坐标，因此我将双极子的尺寸缩小了约 40% \ctikzset{bipoles/length=1cm}。
这是使你的电路正确编译的最小更改，但它仍然写得相当差。我稍后会尝试添加更好的版本。
\documentclass[border=10pt]{standalone}
\usepackage[siunitx]{circuitikz}
\begin{document}
\begin{tikzpicture}[american]
\ctikzset{bipoles/length=1cm}
\draw (0,0) to[vsource,l=$0V$] (6.5,0);
\draw (1,0) to [sV, o-o, l=$Vin$] (1,4) % White noise source
to [short] ++(1,0)
to [european resistor,l=$R_1$] ++(0,-2)
to [european potentiometer,l_=$R_{SPI2}$, name=rspi2] ++(0,-1)
to [short] ++(0,-1)
;
% wiper R_{SPI2}
\draw (2.6,2.3) to [short,-o] (2.6, 2.3 |- rspi2.wiper) -- (rspi2.wiper);
\draw (3.5,4) to [C,l=$C$] (3.5,2.3)
to [short] (3.5,3)
;
\draw (5,4) to [short] ++(0,-0.3)
to [european potentiometer,l=$R_{SPI1}$, name=rspi1] ++(0,-1.3);
\draw (5,2.6) to [short] (5,2.3);
%wiper R_{SPI1}
\draw (5.5,4) to [short,-o] (5.5, 4 |- rspi1.wiper) -- (rspi1.wiper);
\draw (2,4) to [short] (3.5,4);
\node[draw,circle,blue] (A) at (9,2.3) {$FFT2$};
% the following is wrong too
\draw [short,o-,blue] (8,2.3) to [short,-o] (2.0,2.3);
\node[draw,circle,blue] (A) at (9,4) {$FFT1$};
% and this
\draw [short,o-,blue] (8,4) to [short] (3.0,4.0)
%to [short,-o] (15.0,3.0);
;
\end{tikzpicture}
\end{document}
最后...如果您需要重新调整电路的比例，请不要使用不同的 x 和 y 比例...这样会变得非常丑陋。如果您想缩小所有内容，保持比例，请使用scale=0.8, transform shape图片选项。
我绘制电路的方式如下，例如：
\documentclass[border=10pt]{standalone}
\usepackage[T1]{fontenc}
\usepackage[siunitx]{circuitikz}
\begin{document}
\begin{tikzpicture}[american]
\draw (0,0) -- ++(2,0) to[vsource,l=\SI{0}{V}] ++(7,0);
% you could use the noise-style generators too, but let's just fill it
\draw (1,0) to [sV, l=$V_{\mathit{in}}$, fill=gray] ++(0,4)
to [short] ++(2,0) coordinate(top r1) % this will name the position as (top r1)
to [european resistor,l=$R_1$] ++(0,-2) coordinate(bot r1)
to [european potentiometer,l_=$R_{\mathit{SPI}2}$, name=rspi2] ++(0,-2)
-- (0,0 -| top r1) % orthogonal coordinate, no guessing!
;
\draw [blue] (bot r1) to[short, -o] ++(6,0) coordinate(fft2);
\draw [blue] (top r1) to[short, -o] ++(6,0) coordinate(fft1);
\draw (bot r1) ++(1,0) |- (rspi2.wiper);
\draw (top r1) ++(2,0) coordinate(tmp) to [C,l_=$C$] (tmp|-bot r1);
\draw (top r1) ++(4,0) coordinate(tmp)
to [european potentiometer,l_=$R_{\mathit{SPI}1}$, name=rspi1] (tmp|-bot r1);
\draw (top r1) ++(5,0) |- (rspi1.wiper);
\node[draw,circle,blue, right=0.5cm] at(fft2) {\textit{FFT2}};
\node[draw,circle,blue, right=0.5cm] at(fft1) {\textit{FFT1}};
\end{tikzpicture}
\end{document}
