id: 06096156
dt: j
an: 06096156
au: Yao, S.N.; Collins, T.; Jančovič, P.
ti: Hybrid method for designing digital Butterworth filters.
so: Comput. Electr. Eng. 38, No. 4, 811-818 (2012).
py: 2012
pu: Elsevier Science Ltd. (Pergamon), Oxford
la: EN
cc: 
ut: 
ci: 
li: doi:10.1016/j.compeleceng.2012.03.015
ab: Summary: A procedure for designing digital Butterworth filters is proposed.
    The procedure determines the denominator and the numerator of the
    filter transfer function based on the positions of the poles in the
    $s$-plane and zeros in the $z$-plane, respectively, and calculates the
    gain factor using a maximum point normalization method. In contrast to
    some conventional algorithms, the presented procedure is much simpler
    by directly obtaining the filter with 3-dB frequencies. This makes the
    presented algorithm a useful tool for determining the boundaries in
    electronic or communication systems’ frequency responses. Moreover,
    the proposed algorithm is compatible with high-order transformations
    which are the limitations of general pole-zero placement techniques.
    The proposed method is illustrated by the examples of designing the
    low-pass, high-pass, band-pass, and band-stop filter.
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