Code: Select all
\begin{tikzpicture}
\draw (0,0) node[ground]{} to[R=$R_B$] ++(0,2) coordinate(a)
-- ++(0,1) node[op amp, anchor=+](A){}
(a) to[R=$R_A$, *-] (a-|A.out) -- (A.out);
\end{tikzpicture}
https://imgur.com/RlvI2Tw