Open AccessBook
Understanding Delta-Sigma Data Converters
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
Analysis and Design of Continuous-Time Delta–Sigma Converters Incorporating Chopping
TL;DR: This work analyzes the mechanisms of shaped-noise aliasing in OTA-Feedforward-compensated OTAs that use two-stage feedforward- Compensated OTA integrators, and shows that aliasing can be largely mitigated by using an finite impulse response feedback digital-to-analog converter.
Journal ArticleDOI
A 0.6-V 82-dB 28.6- $\mu$ W Continuous-Time Audio Delta-Sigma Modulator
TL;DR: The design of a low-voltage low-power fourth-order single-bit continuous-time Delta-Sigma modulator, implemented in a 0.13-μm standard CMOS technology with a core area of 0.11 mm2, achieves an 82-dB dynamic range (DR), and a 79.1-dB peak signal-to-noise and distortion ratio (SNDR) over a 20-kHz signal bandwidth.
Journal ArticleDOI
An Optimal Family of Exponentially Accurate One-Bit Sigma-Delta Quantization Schemes
TL;DR: This paper studies the discrete minimization problem that corresponds to optimizing the error decay rate for feedback filters that fall into a class the authors call “minimally supported,” and solves a relaxed version of this problem exactly and provides explicit asymptotics of the solutions.
Journal ArticleDOI
A Mostly Digital VCO-Based CT-SDM With Third-Order Noise Shaping
TL;DR: The architectural concept and implementation of a mostly digital voltage-controlled oscillator-analog-to-digital converter (VCO-ADC) with third-order quantization noise shaping and how this combination can function as a continuous- time integrator to form a high-order continuous-time sigma–delta modulator (CT-SDM) is presented.
Journal ArticleDOI
On incremental sigma-delta modulation with optimal filtering
TL;DR: A quantization-theoretic framework for studying incremental sigma-delta (/spl Sigma//spl Delta/) data conversion systems makes it possible to efficiently compute the quantization intervals and hence the transfer function of the quantizer, and to determine the mean square error (MSE) and maximum error for the optimal and conventional linear filters for first and second order incremental /spl Sigma //spl Delta/ modulators.
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.