Circuitikz 运算放大器规模

Question

我想问你，如何在我的 Circuitikz 绘图中缩放运算放大器的尺寸。我尝试

  \ctikzset{tripoles/op amp/scale=0.5}

但不幸的是它不起作用。我在《circuitikz手册。

微电子工程协会

  \begin{circuitikz}[scale=1, every node/.style={scale=1}]
    \ctikzset{resistor=european}
    \draw (0,0) node[op amp] (opamp) {};
    \node [left=0.1cm of opamp.-]       (p1) {};
    \node [left=0.1cm of opamp.+]       (p2) {};
    \node [above=0.8cm of p1]           (A)  {};
    \node [left=1.5cm of A]             (p3) {};
    \node [right=2.7cm of A, coordinate](C)  {};
    \node [right=0.8cm of C]            (p6) {};
    \node [below=0.8cm of p2]           (B)  {};
    \node [left=1.5cm of B]             (p4) {};
    \node [right=2.5cm of B]        (ground) {};
    \node [right=0.1cm of opamp.out, coordinate] (vo) {};
    %%% Draw connections
    \draw (p3) node[left] {$u_1$} to[R=$R_1$,o-] (A)  to[R=$R_2$,*-] (C); 
    \draw (opamp.-)   to[short] (p1) to[short] (A);
    \draw (opamp.out) to[short] (vo);
    \draw (vo) to[short,-*] (vo |- C); 
    \draw (p4) node[left] {$u_2$} to[R=$R_3$,o-] (B)  to[R=$R_4$,*-] (ground) node [sground] {};  
    \draw (opamp.+) to[short] (p2) to[short] (B); 
    \draw (C) to[short,-o] (p6) node[right] {$u_{0}$};
    \node[above] at (A) {A}; % text 
    \node[below] at (B) {B}; % text 
  \end{circuitikz} 

Answer 1

嗯，正在寻找这个老问题的答案......在我看来，它们的结果有点奇怪（没用），尽管它们正确地展示了如何扩展放大器的可能性。

答案和问题都给出了非常不寻常的结果（在我看来是错误的）。要按照通常的方式绘制这个电路（稍微缩小一点），我建议除了放大器形状外，还要amp symbol相应地缩放电阻器尺寸（所有元件的尺寸都将平衡），并改变绘制电路的方式：

\documentclass[border=3.141592]{standalone}
\usepackage{circuitikz}

\begin{document}
    \begin{circuitikz}[european]
\ctikzset{resistors/scale=.6,
          amplifiers/scale=0.8,
          amp symbol font={\footnotesize}
          }
\draw   (0,0)   node[op amp] (oa)    {}
        (oa.-)  to [short, -*]   ++ ( 0,1)      coordinate[label=above:A] (A) 
                to [R, a=$R_1$,*-o] ++ (-2,0)   node[left]  {$u_1$}
        (A)     to [R=$R_2$]        ++ ( 2,0)   coordinate  (C) 
                to [short, *-o]     ++ ( 1,0)   node[right] {$u_o$}
        (C)     |-  (oa.out)
        (oa.+)  to [short, -*]      ++ (0,-1)   coordinate[label=below:B] (B)
                to [R, a=$R_3$,*-o] ++ (-2,0)   node[left]  {$u_1$}
        (B)     to [R=$R_5$]        ++ ( 2,0)   node [sground] {}  
                ;
    \end{circuitikz} 
\end{document}

我不确定上面的 MWE 和得到的结果是否是 OP 想要的。至少建议的 MWE 与 OP MWE 相比要短得多，也简单得多。

Answer 2

在节点生成时使用比例。

\node[op amp, scale = xx]

Answer 3

运算放大器属于放大器类（见手动的\ctikzset{tripoles/op amp/scale=0.5}），因此，如果你用以下代码替换，你的例子应该可以工作\ctikzset{amplifiers/scale=0.5}

  \begin{circuitikz}[scale=1, every node/.style={scale=1}]
    \ctikzset{resistor=european, amplifiers/scale=.7}
    \draw (0,0) node[op amp] (opamp) {};
    \node [left=0.1cm of opamp.-]       (p1) {};
    \node [left=0.1cm of opamp.+]       (p2) {};
    \node [above=0.8cm of p1]           (A)  {};
    \node [left=1.5cm of A]             (p3) {};
    \node [right=2.7cm of A, coordinate](C)  {};
    \node [right=0.8cm of C]            (p6) {};
    \node [below=0.8cm of p2]           (B)  {};
    \node [left=1.5cm of B]             (p4) {};
    \node [right=2.5cm of B]        (ground) {};
    \node [right=0.1cm of opamp.out, coordinate] (vo) {};
    %%% Draw connections
    \draw (p3) node[left] {$u_1$} to[R=$R_1$,o-] (A)  to[R=$R_2$,*-] (C); 
    \draw (opamp.-)   to[short] (p1) to[short] (A);
    \draw (opamp.out) to[short] (vo);
    \draw (vo) to[short,-*] (vo |- C); 
    \draw (p4) node[left] {$u_2$} to[R=$R_3$,o-] (B)  to[R=$R_4$,*-] (ground) node [sground] {};  
    \draw (opamp.+) to[short] (p2) to[short] (B); 
    \draw (C) to[short,-o] (p6) node[right] {$u_{0}$};
    \node[above] at (A) {A}; % text 
    \node[below] at (B) {B}; % text 
  \end{circuitikz}