module: biquad_filter
parameters: double a2, double a3, double b1, double b2, double b3
inputs: double in
outputs:  double out
static_variables:
classes: Filter filt("b1 + b2*s + b3*s^2","1 + a2*s + a3*s^2","b1,b2,b3,a2,a3,Ts",b1,b2,b3,a2,a3,Ts);
init: 
code:
filt.inp(in);
out = filt.out;
