Howtosignalprocessing
- What are the design specifications of a filter?
- How do you filter frequency?
- How are filters classified based on their frequency response?
- What is the filter specifications required to design the analog filters?
What are the design specifications of a filter?
For most digital filters, you typically design the digital filter response in the frequency domain. The frequency response specification for the digital filter typically includes the target magnitude response, phase response, and the allowable deviation for each.
How do you filter frequency?
Frequency filters process an image in the frequency domain. The image is Fourier transformed, multiplied with the filter function and then re-transformed into the spatial domain. Attenuating high frequencies results in a smoother image in the spatial domain, attenuating low frequencies enhances the edges.
How are filters classified based on their frequency response?
The five main types of frequency filters are the high pass, low-pass, all-pass, band pass, and notch filters. Their characteristics are determined by the type and values of circuit components used as well as their arrangement. The classification is based on the frequency range that a filter allows to passes through.
What is the filter specifications required to design the analog filters?
These analog filter design requirements include the ripple specification at the passband frequency edge, the attenuation specification at the stopband frequency edge, and the type of lowpass prototype (which we shall discuss) and its order.
