On Scaling and Output Cardinality of Multi-Bit Digital Error-Feedback Modulators
2012 (English)Manuscript (preprint) (Other academic)
In order to determine a maximum allowed input scale for the stable operation of higher-order delta-sigma modulators, the designers largely depend on the analytical and numerical analysis. In this brief, the maximum allowed input scale to a multi-bit digital error-feedback deltasigma modulator of arbitrary order is derived, mathematically. The digital modulator with an arbitrary output word length is stable if its output does not overflow. Thus, to avoid overflow of the modulator output, the relations between the peak values of the involved digital signals are devised. A number of example configurations are presented to illustrate the usefulness of the derivations.
Place, publisher, year, edition, pages
2012. 1-4 p.
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:liu:diva-112895OAI: oai:DiVA.org:liu-112895DiVA: diva2:773516