\begin{circuit}1

% Circuito con un amplificador operacional, dos capacitores y 4 resistores
%

% Amplificador
\ov1 {} - {} {} {} 

%capacitor 2
\atpin ov1+
\- 2 l \.1 
\- 2 l
\cc\nl \C2 {$C_2$} l
\- 2 l \.2

% Cables a C_1
\atpin .2
\- 2 l

% capacitor 1
\cc\nl \C1 {$C_1$} l

%Conectores
\- 1 l \P4
\connection1 {$v_i$} c l

%Resistor 1
\atpin .2
\- 4 u
\- 6 r
\nl \cc \spring1 {$R_1$} r
\htopin ov1O
\vtopin ov1O


% Salida
\atpin ov1O
\.3

\atpin .3
\connection2 {$v_o$} c r

% Resistores 3 y 4
\atpin ov1-
\- 2 d \.3
\- 5 r
\nl \spring3 {$R_3$} r
\htopin ov1O
\vtopin ov1O

\atpin .3
\nl \cc \spring4 {$R_4$} d
\- 1 d \P3

% Cables al resistor 2
\atpin .1 
\- 3 d 

%resistor 2
\nl \spring2 {$R_2$} d
\vtopin P3


% Tierra
\atpin P3
\htopin P4
\connection3 {} c l

\atpin P3
\htopin ov1O
\connection4 {} c r

\atpin P3
\gnd1

% V_B y V_A
\atpin .1 \shift -0.6 0.7
\put{$V_B$}

\atpin .2 \shift -0.6 -1.5
\put{$V_A$}

\end{circuit}