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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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Patent
Parallel mash delta sigma modulator
Razak Hossain,Andras Pozsgay +1 more
TL;DR: In this paper, a parallel, multi-stage noise shaping (MASH) de!fa-sigma (ΔΣ) modulator was proposed to reduce the required operating frequency by predicting the inputs to later stages of a serial MASH modulator to be multiples of the MASH input.
Proceedings ArticleDOI
Effects of Quantization Noise and Distortion in EPWM Transmitters for OFDM Signal Amplification
TL;DR: The envelope pulse-width modulation (EPWM) transmitter has been studied to address the power efficiency issue on the linear amplification of OFDM signals, but the delta- sigma (Delta-Sigma) modulator in the EPWM transmitter generates quantization noise that degrades signal quality.
Journal ArticleDOI
Indirect-Feedback Sigma-Delta Image Sensors: Theory, Modeling and Design
TL;DR: A novel architecture for a CMOS image sensor that incorporates a column-level sigma-delta (ΣΔ) analog-to-digital converter is presented and a time-domain pixel simulator that enables assessment of the major noise contributions in this type of imager is presented.
Journal ArticleDOI
A study of excess loop delay in tunable continuous-time bandpass delta---sigma modulators using RC-resonators
TL;DR: In this paper, a comprehensive study of the impact of excess loop delay on tunable continuous-time bandpass delta-sigma modulators using RC-resonators is performed, both analytically and by simulations.
Proceedings ArticleDOI
Analysis of Gain and Bandwidth Limitations of Operational Amplifiers in Sigma-Delta Modulators
TL;DR: In this article, the influence of the opamp's DC gain on the signal and noise transfer function of a third order Sigma-Delta modulator is analyzed. But, the authors do not consider the effect of opamp opamps on the performance degradation or even instability.
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.