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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
High-performance time-based continuous-time sigma-delta modulators using single-opamp resonator and noise-shaped quantizer
Mohsen Tamaddon,Mohammad Yavari +1 more
TL;DR: The proposed TCSDM incorporates a novel time-based noise-shaped quantizer (NSQ) to significantly enhance its performance at a very low cost and the analog complexity of the modulator is significantly reduced.
Journal ArticleDOI
Efficient Discrete-Time Bandpass Sigma-Delta Modulator and Digital I/Q Demodulator for Multistandard Wireless Applications
TL;DR: An efficient discrete-time bandpass sigma-delta (SigmaDelta) modulator and digital in-phase /quadrature (1/Q) demodulators for multistandard wireless applications and the simple and robust digital I/Q demodulator which has been realized using a field programmable gate array (FPGA) for digital signal processing.
Journal ArticleDOI
Noise-Shaped Residue-Discharging Delta-Sigma ADCs With Time-Modulated Pulse Feedback
TL;DR: This paper describes a delta-sigma modulator with a new feedback topology in combination with the recently proposed two- step residue-discharging quantizer which takes advantage of the two-step nature of the quantizer.
Patent
A method and system for tracking inherent saliencies of ac machines
TL;DR: In this article, transient current time derivative changes or transient current changes due to voltage pulses applied, to the stator windings are sensed, and the sensed signals are evaluated to track the saliencies.
Proceedings ArticleDOI
An iterative LMI approach to IIR noise transfer function optimization for delta-sigma modulators
TL;DR: The proposed result overcomes the limitation of a latest method that can deal with NTFs with finite impulse response only and has an advantage over the benchmark one in improving the signal-to-noise ratio.
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.