The Analog Filter Design block designs and implements analog IIR filters with standard band configurations. All of the analog filter designs let you specify a filter order. The other available parameters depend on the filter type and band configuration, as shown in the following table.
The table parameters are
Ωp — passband edge frequency
Ωp1 — lower passband edge frequency
Ωp2 — upper cutoff frequency
Ωs — stopband edge frequency
Ωs1 — lower stopband edge frequency
Ωs2 — upper stopband edge frequency
Rp — passband ripple in decibels
Rs — stopband attenuation in decibels
For all of the analog filter designs, frequency parameters are in units of radians per second.
The Analog Filter Design block uses a state-space filter representation, and applies the filter using the State-Space block in the Simulink® Continuous library. All of the design methods use Signal Processing Toolbox™ functions to design the filter:
The Analog Filter Design block is built on the filter design capabilities of Signal Processing Toolbox software.
The Analog Filter Design block does not work with the Simulink discrete
solver, which is enabled when the Solver list
is set to