Math Is Fun Forum

RyanW

Guest

IIR Filter Coefficients

I have two equations that I need to put into the following form:

The two equations are:

1.

2.

Here is an example:

Would anybody like to take a crack at this?

Cheers

cushydom

Member

Registered: 2008-04-23

Posts: 10

Re: IIR Filter Coefficients

dont know how to write it like above.
((4)(z^-2)+(-8)(z^-1)+4)/((4+w-2w/Q)(z^-2)+(2w-8)(z^-1)+(4+w+2w/Q))
that is my answer to the first question. i used w instead od omega

RyanW

Guest

Re: IIR Filter Coefficients

dont know how to write it like above.
((4)(z^-2)+(-8)(z^-1)+4)/((4+w-2w/Q)(z^-2)+(2w-8)(z^-1)+(4+w+2w/Q))
that is my answer to the first question. i used w instead od omega

Thanks for trying.
Sorry, I'm not sure what the correct solution is, but thats not it apparently; my filter becomes very unstable when I use those coefficients.