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• W2514458692 abstract "A set of three constant-input limit cycle-free state-space second-order digital filter sections were proposed in a paper of 1986, to be used as building blocks for cascade or parallel higher order filter design. They were called structure type I, structure type II (which is entirely identical to the first one) and structure type III, by the authors who proposed them. Those structures are different from other constant-input limit cycle-free second-order building blocks in the sense that they are computationally less complex. As showed in the paper that introduced it, the structure type I is also a low roundoff noise one, when compared to the minimum noise structure designed under L∞ scaling. Unfortunately, because the structure type III is slightly more complex than the structure type I (its demands three twoinput adders more to be computed), its synthesis procedure and noise performance were not addressed in the initial paper. However, it was demonstrated later, that the structure type III presents relative output roundoff noise variances lower than the structure type I for the case of L2 scaled lowpass filters. Then, in this work, the structure type III is revised, and new strategies for designing it are proposed. Under proper design, it is showed that the relative output roundoff noise variance is minimal. Both L2 and L∞ scaling are here discussed. Examples are shown to support the results presented. Finally, in order to stress the good noise performance of the structure type III designed according to the strategies here discussed, it is compared to the noise performance of some other filter structures known in the literature. The conclusion is that the new structure type III here proposed is a good candidate for being the building block to implement high order narrowband filters." @default.
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• W2514458692 date "1998-12-30" @default.
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• W2514458692 title "SOBRE O PROJETO DE FILTROS DIGITAIS DE SEGUNDA ORDEM IMUNES A CICLOS LIMITE" @default.
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