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A new class of very low sensitivity and low roundoff noise recursive digital filter structures

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3 Author(s)

A class of new structures is proposed, for the realization of the recursive digital filter with poles near the unit circle, by introducing the particular type of delay replacement scheme in the existing digital filter structure and then, inserting, delays at the. proper places to avoid the delay-free loops. By applying the proposed method to the second-order direct form structures, new structures are found with very low magnitude transfer function sensitivities with respect to multiplier coefficients and low roundoff noises. Some numerical results are also presented.

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Circuits and Systems, IEEE Transactions on  (Volume:28 ,  Issue: 12 )