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Filter Designer Tool allows simple and very fast design of digital filters. Fig. 15-1 shows one option in the main menu of mikroC which enables access to Filter Designer Tool.
Fig. 15-1. Filter designer tool
|Stability condition is always fulfilled!||For a given amplitude characteristic FIR filter is of considerably higher order compared to IIR filter (higher complexity)|
|Linear phase (by a proper design applied in the Filter Designer Tool)|
|For a given amplitude characteristic IIR filter is of considerably lower order compared to FIR filter||Stability condition is not always fulfilled. As the order of IIR filter increases, the probability that the filter will become unstable increases|
A[dB] – filter amplification in dB, Ap – permitted bandpass ripple of amplification in dB, As – minimum bandstop attenuation in dB, Wp, Wpass – bandpass boundary frequencies, Ws, Wpass – bandstop boundary frequencies, Ws – one half of the sampling frequency.