Title: A novel signal-predicting multibit delta-sigma modulator
Abstract:In this paper, the signal-predicting oversampling scheme (Lu et al. (2002)) is developed for the design of the internal quantizers of multibit delta-sigma (/spl Delta//spl Sigma/) modulators. By apply...In this paper, the signal-predicting oversampling scheme (Lu et al. (2002)) is developed for the design of the internal quantizers of multibit delta-sigma (/spl Delta//spl Sigma/) modulators. By applying the scheme, it has been derived that, regardless of the resolution of the internal quantizer, only 4 comparators are required in a first-order multibit /spl Delta//spl Sigma/ modulator provided that an appropriate oversampling ratio (OSR) is chosen. To verify the derived results, an illustrative signal-predicting first-order 4-bit /spl Delta//spl Sigma/ modulator with 4 comparators is presented. Simulation results show that the modulator functions very well and when compared with a corresponding modulator with a normal flash internal quantizer, in which 16 comparators have to be used, the proposed modulator demonstrates advantages in power consumption and silicon area.Read More
Publication Year: 2005
Publication Date: 2005-03-31
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 4
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