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Understanding Delta-Sigma Data Converters
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TLDR
This chapter discusses the design and simulation of delta-sigma modulator systems, and some of the considerations for implementation considerations for [Delta][Sigma] ADCs.Abstract:
Chapter 1: Introduction.Chapter 2: The first-order delta-sigma modulator.Chapter 3: The second-order delta-sigma modulator.Chapter 4: Higher-order delta-sigma modulation.Chapter 5: Bandpass and quadrature delta-sigma modulation.Chapter 6: Implementation considerations for [Delta][Sigma] ADCs.Chapter 7: Delta-sigma DACs.Chapter 8: High-level design and simulation.Chapter 9: Example modulator systems.Appendix A: Spectral estimation.Appendix B: The delta-sigma toolbox.Appendix C: Noise in switched-capacitor delta-sigma data converters.read more
Citations
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Proceedings ArticleDOI
A new zero-optimization scheme for noise-coupled ΔΣ ADCs
TL;DR: A new zero-optimization scheme for noise-coupled ΔΣ analog-to-digital converters (ADCs) by optimizing noise-transfer-function (NTF) zero locations to get maximum in-band noise shaping.
Proceedings ArticleDOI
A switched current sigma delta modulator using a low distortion feedfoward topology
TL;DR: This paper proposes the use of a similar low distortion topology on an implementation of a switched current sigma-delta (SI-SD) modulator, and demonstrates a reduction of harmonic distortion observed in implementations with simple integrator cells.
Book ChapterDOI
Incremental and Extended-Range Data Converters
TL;DR: By combining the IDC with a serial ADC, such as a successive-approximation register (SAR) ADC, an extended-range ADC results which has increased accuracy, which makes IDCs useful in applications where very high resolution and low power are required.
Journal ArticleDOI
A 1.8 V 828 μW 80 dB digital MEMS microphone
TL;DR: In this article, a single-package digital MEMS Capacitive Microphone (MCM) system consisting of a MCM which is wire-bonded with its readout interface (RI) is presented.
Journal ArticleDOI
Accurate Time-Domain Simulation of Continuous-Time Sigma–Delta Modulators
TL;DR: This method permits not only a time-domain simulation of the modulator output but also the simulation of intermediary signals, based on the discretization of the CT models and the use of a discrete simulator, which is more efficient than an analog simulator.
References
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Journal ArticleDOI
A higher order topology for interpolative modulators for oversampling A/D converters
TL;DR: Higher order modulators are shown not only to greatly reduce oversampling requirements for high-resolution conversion applications, but also to randomize the quantization noise, avoiding the need for dithering.
Journal ArticleDOI
Decimation for Sigma Delta Modulation
TL;DR: It is shown that digital filters comprising cascades of integrate-and-dump functions can match the structure of the noise from sigma delta modulation to provide decimation with negligible loss of signal-to-noise ratio.
Journal ArticleDOI
An analysis of nonlinear behavior in delta - sigma modulators
Sasan H. Ardalan,J.J. Paulos +1 more
TL;DR: This paper introduces a new method of analysis for deltasigma modulators based on modeling the nonlinear quantizer with a linearized gain, obtained by minimizing a mean-square-error criterion, followed by an additive noise source representing distortion components.
Book ChapterDOI
The Structure of Quantization Noise from Sigma-Delta Modulation
James C. Candy,O. Benjamin +1 more
TL;DR: Simple algebraic expressions for this modulation noise and its spectrum in terms of the input amplitude are derived and can be useful for designing oversampled analog to digital converters that use sigma-delta modulation for the primary conversion.
Journal ArticleDOI
A fourth-order bandpass sigma-delta modulator
TL;DR: The modulator of a bandpass analog/digital (A/D) converter, with 63 dB signal/noise for broadcast AM bandwidth signals centered at 455 kHz, has been implemented by modifying a commercial digital-audio sigma-delta ( Sigma Delta ) converter.