Biquad with external coefficient

I'm using biquad function but I need to make the filter varying during my simulation so I would like to pass 'sos' and 'g' parameters as input rather than through the mask. Is there any way of doing it? Thanks

Answer 1

[Manikanta Aditya]

Hi @Angelo,

Yes, you can pass the 'sos' and 'g' parameters as inputs to the Biquad Filter block in Simulink to make the filter vary during your simulation.

Here's how you can do it:

• Navigate to the Biquad Filter block in Simulink under [DSP System Toolbox / Filtering / Filter Implementations].
• Set the Coefficient source parameter to Input port(s). This allows you to pass the filter coefficients through input ports.
• Set the Scale values mode to Specify via input port (g). This enables you to pass the scale values through an input port.
• Connect your sos matrix to the input port designated for the numerator coefficients.Connect your g values to the input port designated for the scale values.
• Run your simulation with the varying 'sos' and 'g' parameters as inputs. This setup allows the filter coefficients to change dynamically during the simulation .

For more detailed guidance, refer to the Biquad Filter

I hope this helps.