IIR Filters in FPGA

[rhong]

I am trying to modify IIR filters and use them in FPGA vi. Originally, the signal was filtered using the IIR filter vi (see below).

The coefficients were calculated using matlab, so this vi (and different combinations of it) was configured to do different signal processing. I would like to use the sample IIR filter in a FPGA vi and I have been trying to achieve this by using the Digital Filter Design Toolkit. However, the IIR filter design vi (and the classical filter design express vi) ask for different inputs than matlab. Is there any way to do this?

Thanks!

[amezam]

Hi rhong,

There is a couple of Express VIs for Butterworth and Notch filters in FPGA. I don’t believe we have a specific function that uses those same coefficients as inputs. However, we do have some guidelines on IIR filter design in FPGA. Otherwise, you could also consider opening the subVI and keep working based on it.