crfbnum.flw

An analysis tool for both continuous- and discrete-time control systems. -Includes a parameter so

*3rd order CRFB delta-sigma
in 10 b1
in 20 b2
in 30 b3
in 40 b4
10 20 1/(z-1)
20 30 1*z/(z-1)
30 40 1/(z-1)
40 out k
out 10 -a1
out 20 -a2
out 30 -a3
40 20 -g1

*initialization
.pre syms z k
.pre a1=0.04561498304582;a2=0.22703749181540;a3=0.56070377829715;
.pre g1=0.02308732933963;b1=a1;b2=a2;b3=a3;b4=1;
*i need transfer function between:
.tf in out
.tf out out
*i also need a TF-object
.post k=1;
.post z=tf('z',1);