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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Quantization and Noise-Shaped Coding for High Efficiency Transmitter Architectures
TL;DR: This thesis investigates the use of 1-bit oversampled signal representation, mainly as a power efficiency enhancement technique for the transmitter, but also as a path toward reduced footprint and increased flexibility.
Journal ArticleDOI
A Class of 1-Bit Multi-Step Look-Ahead $\Sigma $ - $\Delta $ Modulators
TL;DR: It is shown that the MSLA modulators are equivalent to a system of conventional 1-bit modulators in parallel, but with a common multi-input 1- bit quantizer instead of a typical one.
Proceedings ArticleDOI
A time-interleaved multi-mode ΔΣ RF-DAC for direct digital-to-RF synthesis
TL;DR: A multi-mode delta-sigma (ΔΣ) RF digital- to-analog converter (RF-DAC) is proposed for direct digital-to-RF synthesis, eliminating the need for a widely-tuned LO by reconfiguring the ΔΣ modulator (DSM) for a variety of output frequencies, thus making it suitable for software-defined radio.
Journal ArticleDOI
Applying memory polynomial model to linearize wideband multi-bit delta-sigma based transmitters
TL;DR: In this paper, a new predistortion linearization technique based on the memory polynomial model of the power amplifier (PA) and a multi-bit delta-sigma modulator (DSM) is presented.
Proceedings Article
Modelling the imperfections of analog circuits using Second-Order Statistics
TL;DR: In this article, a model that can estimate the analog imperfections of mixed analog-digital systems was proposed, assuming that the only available information is the sampled analog output (blind estimation).
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.