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-rw-r--r--doc/figures/reduced-circ.tikz25
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diff --git a/doc/figures/reduced-circ.tikz b/doc/figures/reduced-circ.tikz
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+++ b/doc/figures/reduced-circ.tikz
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+\begin{tikzpicture}[scale=1, every node/.style={transform shape}]
+ % piezo
+ \draw (0,0) node[rground] {}
+ to[piezoelectric, l=$X$] (0,2) to (2,2)
+ to[R, l=$R_x$, *-] (2,0) node[rground] {};
+
+ % diodes
+ \draw (2,2) to[R,l=$R$, -*] (5,2);
+ \draw (5,0) node[rground] {}
+ to[sDo, l_=$D_2$] (5,2)
+ to[sDo, l_=$D_1$] (5,4)
+ node[vcc] {$V_{cc}$};
+ \draw (5,2) to[short, -o] (6,2)
+ node[right] {$V_o$};
+
+ % opamp
+ \iffalse
+ \draw (9,2.5) node[op amp] (comp) {};
+ \draw (comp.-) to ++(0, 0.5) node[vcc] {$V_{ref}$};
+
+ \draw (comp.+) to[R, l=$R_A$] ($(comp.+) + (-2.5, 0)$) -| (5,2);
+ \draw (comp.+) |- (8,0) to[R, l=$R_F$] ++(2,0) -| (comp.out)
+ to[short, -o] ++(1,0) node[right] {$V_o$};
+ \fi
+\end{tikzpicture} \ No newline at end of file