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Linear Phase Low-Pass IIR Digital Differentiators

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1 Author(s)
Al-Alaoui, M.A. ; Dept. of Electr. & Comput. Eng., American Univ. of Beirut

A novel approach to designing approximately linear phase infinite-impulse-response (IIR) digital filters in the passband region is introduced. The proposed approach yields digital IIR filters whose numerators represent linear phase finite-impulse-response (FIR) filters. As an example, low-pass IIR differentiators are introduced. The range and high-frequency suppression of the proposed low-pass differentiators are comparable to those obtained by higher order FIR low-pass differentiators. In addition, the differentiators exhibit almost linear phases in the passband regions

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Signal Processing, IEEE Transactions on  (Volume:55 ,  Issue: 2 )