.PS
cct_init

# Usual defs...
qrt=dimen_/4;
hlf=dimen_/2;
dim=dimen_;

"$V_\mathrm{in}$ " rjust_
dot; resistor(right_);llabel(,R,);dot
line right_ hlf; dot 
{line right_ hlf; dot; " $V_\mathrm{out}$" ljust_}
diode(down_); dot; ground; move right_ hlf; dot
line left_ 2*dim; dot; move right_ dim; dot
diode(up_)

move down_ 2*dim then left_ dim;right_
"$V_\mathrm{in}$ " rjust_
dot; resistor(right_);llabel(,R,);dot
{line right_ hlf;dot; " $V_\mathrm{out}$" ljust_}
diode(down_ hlf,Z); move down_ hlf; dot; ground
diode(up_ hlf,Z); move down_ hlf then right_ hlf
dot;line left_ 1.5* dim; dot

"\tiny Limiter" at (2*dim,-3*dim)
.PE