module: type2_passive_loop_filter
parameters: double c1, double c2, double r1
inputs: double in
outputs:  double out
static_variables:
classes: Filter filt("1+a*s","b*s + c*s^2","a,b,c,Ts",r1*c2,c1+c2,r1*c1*c2,Ts);
init: 
code:
filt.inp(in);
out = filt.out;
