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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
Delta-Sigma Digital-to-Time Converter for Band-Select Spread Spectrum Clock
TL;DR: In this paper, the authors proposed an innovative method of converting digital signal to time-domain analog signal, which fully enjoys robustness and digital circuit friendliness, utilizing a digital delta-sigma ( ) modulator following a digital-to-time converter (DTC) circuit with various modulation methods.
Proceedings ArticleDOI
Enhanced multi-bit delta-sigma modulator with two-step pipeline quantizer
O. Rajaee,Un-Ku Moon +1 more
TL;DR: A two-step pipeline ADC is used as the quantizer of this delta-sigma modulator to reduce the quantization noise at the output of the modulator and the proposed structure relaxes the output swing and gain requirements of the integrators.
Journal ArticleDOI
Performance Limitation Analysis of Highly-Digital Time-Based Closed-Loop Sensor-to-Digital Converter Architectures
TL;DR: The theoretical and comparative analysis of two major time-based architectures for sensor interfaces using a voltage-controlled oscillator (VCO) to achieve a highly-digital scalable implementation are presented, confirming the theoretical analysis and emphasizing the different design trade-offs and practical considerations.
Journal Article
A low latency multichannel audio processing evaluation platform
TL;DR: The evaluation system designed supports 12 channel, 24 bits Sigma Delta based ADC/DAC, incorporating both a programmable FPGA and a Digital Signal Processor, to have accurate latency control and estimation over all the stages of digital audio processing chain.
Proceedings ArticleDOI
Designing CT bandpass ΣΔ modulators with arbitrary STF shapes
TL;DR: This work gives a general introduction to the web-based design tool www.sigma-delta.de and explains the features concerning bandpass modulators in detail together with corresponding examples.
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.