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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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Proceedings ArticleDOI
Mismatch-error noise-shaping based digital multiphase modulator
TL;DR: The proposedMultiphase modulator is able to generate the control pulses for each phase using a single, low-frequency clock, and to achieve automatic current-sharing among the phases, and enables the designer to achieve the full dynamic capabilities of the multiphase converter.
Proceedings ArticleDOI
Delta sigma (ΔΣ) based novel modulation technique replacing “analog” amplitude modulation (AM)
TL;DR: This brief presents a novel idea of replacing the purely analog technique of AM modulation with ΔΣ modulation, to transmit the pulse wave with same amplitude but varying width with respect to the amplitude of the input signal.
Book ChapterDOI
A 480 MHz Band-Pass Sigma Delta Analog to Digital Modulator with Active Inductor Based Resonators
TL;DR: In this article, the authors presented a 480 MHz, continuous time, 6th order band-pass Sigma Delta Analog to Digital modulator in IBM 0.18 um CMOS technology, which replaces traditional RLC circuits, containing spiral inductors with high quality factor, active inductor based resonators utilizing negative impedance circuits.
Proceedings ArticleDOI
Subtractive dithering technique for delta-sigma modulator
TL;DR: A novel subtractive dithering technique used in delta-sigma modulators is presented which improves the spectral integrity of the modulators while minimizing the tradeoffs due to the use of dither.
Proceedings ArticleDOI
High Dynamic Range adaptive ΔΣ-based Focal Plane Array architecture
TL;DR: The proposed architecture can extend the DR for about 20N log2 dB at the high end of Photo-diode current with an N bit Up-Down counter, and can compensate for the larger readout noise by employing Extended Counting at the low end.
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.