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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
Design of Continuous-Time ΣΔ-modulator With Single-Bit Quantizer With Hysteresis Operating at Limit Cycle
TL;DR: In this article , a continuous-time ΣΔ-modulator operating at a limit cycle is presented, which employs both the describing functions linearization method and the out-of-band gain theory to find the parameters of the loop filter.
Patent
Modulator and a/d converter
TL;DR: In this article, a delta-sigma-A/D converter with multiple integrators connected in cascade is presented, where the integrator positioned at the last stage is a passive integrator not using an amplifier circuit.
Proceedings ArticleDOI
A search algorithm to design optimum CT ΔΣ modulator with finite GBW amplifiers
TL;DR: An algorithm of designing continuous time delta-sigma (CT ΔΣ) modulators is presented and simulation results show that the specifications of designed modulators are close to the ideal ones.
Proceedings ArticleDOI
Optimal reconfiguration instant in ΣΔ Modulators
TL;DR: In this paper , the authors analyzed the transient response of discrete time Sigma-Delta modulators to find the optimal reconfiguration moment and showed that the transient is optimal when the first state variable of the loop filter is zero at the reprogramming instant.
Proceedings ArticleDOI
High-Level Design of a 14-bit Continuous-Time Sigma-Delta Modulator with FIR DAC for Low-Voltage Audio Devices
TL;DR: In this article , a continuous-time third-order sigma-delta modulator with a FIR DAC for audio devices, using a supply voltage of 0.5 V, is presented.
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.