(***********SECOND ORDER PROCESS**************)
(* variables are declared as LOCAL except 
   input parameter "OL_in" and outpur parameter "OL_out" *)

OL_pr_out := OL_b1 * OL_in  -  OL_a1*OL_outmem1  -  OL_a2*OL_outmem2;
OL_outmem2 := OL_outmem1;
OL_outmem1 := OL_pr_out;
OL_out := OL_pr_out;


