Higher order sigma-delta modulator loopfilter paralel form representation in Z and S domain

In this paper we present the conversion of arbitrary high order sigma-delta modulator Z-domain loopfilter transfer function into parallel form low order subsections in both S and Z domains. The benefit of this type filter form representation is the existence of theory that can validate sigma delta m...

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Bibliographic Details
Main Authors: Tsenov, Georgi T., Mladenov, Valeri M.
Format: Conference Proceeding
Language:English
Subjects:
Analog-to-Digital Conversion
Filtering theory
Mathematical model
Modulation
Sigma delta modulation
Sigma-Delta Modulators
Signal to noise ratio
Stability
Stability analysis
Transfer functions
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Summary:In this paper we present the conversion of arbitrary high order sigma-delta modulator Z-domain loopfilter transfer function into parallel form low order subsections in both S and Z domains. The benefit of this type filter form representation is the existence of theory that can validate sigma delta modulator's stability. The S domain filter representation is suitable for analog schematic element value calculation stage done according to the utilized transfer function when direct analogue parallel loopfilter implementation is performed.
ISSN:2324-8297
DOI:10.1109/INDS.2011.6024819