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An error cancellation digital-filter structure and its distributed-arithmetic implementation

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2 Author(s)

This note presents a novel digital-filter structure which produces less roundoff noise than that which is produced by the conventional canonical form. This filter structure minimizes the roundoff-noise gain by introducing additional (or altering existing) zeros for the roundoff noise but not for the signal. Since the filter structure is based upon a general noise-canceling technique associated with the quantizer, it can be applied to a variety of forms of digital filters. A distributed-arithmetic ROM implementation of the new structure is presented as an application example to demonstrate its extreme simplicity.

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Circuits and Systems, IEEE Transactions on  (Volume:28 ,  Issue: 4 )