\begin{circuit}1

% Amplificador
\ov1 {$K$} - {} {} {}

%resistor 3
\atpin ov1+
\- 2 l
\.1
\- 1 l
\cc\nl \spring1 {$R_3$} l
\- 1 l \P1

% Cables al capacitor a tierra
\atpin .1
\- 2 d \P2

%Capacitor 4
\nl \cc \C1 {$C_4$} d
\- 9 d \P3

% Cables al resistor1
\atpin P1 \.2
\- 1 l

% resistor1
\cc\nl \spring2 {$R_1$} l

%Conectores
\- 1 l \P4
\connection1 {$V_I(s)$} c l

%Capacitor 2
\atpin .2
\- 3 u
\- 8 r
\nl \cc \C2 {$C_2$} r
\htopin ov1O
\vtopin ov1O


% Salida
\atpin ov1O
\.3

\atpin .3 \- 1 r
\connection2 {$V_O(s)$} c r

% K
\atpin ov1-
\- 2 d \.4
\- 4 r

\nl \spring1 {$R_{K1}$} r
\htopin ov1O
\vtopin ov1O

% Segundo resistor
\atpin .4
\cc\nl \spring2 {$R_{K2}$} d
\vtopin P3

% conectores de tierra
\htopin P4
\connection3 {} c l

\atpin P3
\htopin ov1O \- 1 r
\connection4 {} c r

\atpin P3
\gnd1

\end{circuit}