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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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Journal ArticleDOI
State scaling of continuous-time sigma-delta modulators
TL;DR: The presented approach scales the different states of the system instead of the coefficients, and it is possible to tune the maximum out-of-band gain directly in continuous time.
Proceedings ArticleDOI
A power optimized decimator for sigma-delta data converters
Dionisio de Carvalho,J. Navarro +1 more
TL;DR: An optimized design technique for a decimator (or decimation filter) which is part of a 2nd-order sigma-delta modulator with an oversampling ratio (OSR) of 128 and part of an analog-to-digital converter designed for a digital hearing aid.
Dissertation
A Low-power Pipeline ADC with Front-end Capacitor-sharing
TL;DR: A comparison is conducted between a capacitor-sharing ADC and a regular ADC and as a result, the technique reduces the power consumption in the front-end S/H by 39%.
Journal ArticleDOI
Automatic tuning of digitally-controllable positive-feedback OTAs in continuous-time sigma---delta modulators
Astria Nur Irfansyah,Andrew Nicholson,Artemij Iberzanov,Julian Jenkins,Torsten Lehmann,Tara Julia Hamilton +5 more
TL;DR: A technique suitable for on-chip tuning of digitally-tunable positive-feedback operational transconductor amplifiers in a continuous-time sigma–delta modulator (CT-SDM) with active-RC integrator stages with correlation with the operational transconductance amplifier (OTA) DC gain is proposed.
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.