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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
Control-Bounded Analog-to-Digital Conversion
TL;DR: A control-bounded analog-to-digital converter consists of a linear analog system that is subject to digital control, and a digital filter that estimates the analog input signal from the digital control signals.
Proceedings ArticleDOI
Limit cycle suppression technique using digital dither in delta sigma DA modulator
TL;DR: This paper proposes a digital dither technique to suppress limit cycles in a ΔΣ DA modulator that uses an exclusive OR (XOR) gate at the modulator output and thedigital dither is generated by another ΔD modulator.
Journal ArticleDOI
Low-Pass Filtering SC-DAC for Reduced Jitter and Slewing Requirements on CTSDMs
TL;DR: By filtering the feedback signal in the discrete-time domain, the jitter robustness of the modulator is greatly improved and most importantly the slewing requirements on the OpAmps in themodulator’s loop filter are greatly relaxed up to a level that the Opamps can be scaled down toward their ultimate noise limited power level.
Journal ArticleDOI
System-Level Power Optimization of Digital Audio Back End for Hearing Aids
TL;DR: Insight into the trade-offs involved is used to optimize the interpolation filter and the sigma-delta modulator on the system level so that the switching frequency of the Class D PA—the main power consumer in the back end—is minimized.
Proceedings ArticleDOI
A Three-Stage Operational Transconductance Amplifier for Delta Sigma Modulator
TL;DR: In this paper, the design and simulation of a low power, high gain three stage operational transconductance amplifier (OTA) is presented, which has a DC gain of 73.5 dB, a unity gain bandwidth (UGB) of 39.8 MHz and a phase margin of 59°.
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.