The design of sigma-delta modulation analog-to-digital converters

The author examines the practical design criteria for implementing oversampled analog/digital converters based on second-order sigma-delta ( Sigma Delta ) modulation. Behavioral models that include representation of various circuit impairments are established for each of the functional building bloc...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 1988-12, Vol.23 (6), p.1298-1308
Main Authors: Boser, B.E., Wooley, B.A.
Format: Article
Language:English
Subjects:
Analog-digital conversion
Applied sciences
Circuit properties
CMOS technology
Delta-sigma modulation
Digital modulation
Dynamic range
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filters
Integrated circuit technology
Semiconductor device noise
Signal convertors
Signal resolution
Very large scale integration
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Summary:The author examines the practical design criteria for implementing oversampled analog/digital converters based on second-order sigma-delta ( Sigma Delta ) modulation. Behavioral models that include representation of various circuit impairments are established for each of the functional building blocks comprising a second-order Sigma 2gD modulator. Extensive simulations based on these models are then used to establish the major design criteria for each of the building blocks. As an example, these criteria are applied to the design of a modulator that has been integrated in a 3- mu m CMOS technology. An experimental prototype operates from a single 5-V supply, dissipates 12 mW, occupies an area of 0.77 mm/sup 2/, and has achieved a measured dynamic range of 89 dB.< >
ISSN:0018-9200
1558-173X
DOI:10.1109/4.90025