Open AccessBook
Understanding Delta-Sigma Data Converters
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
A Wide-band 2-path cross-coupled sigma delta ADC
E. Bilhan,Franco Maloberti +1 more
TL;DR: A new method to obtain 2nd order noise shaping from two 1st order, time interleaved modulators by applying cross-coupling of quantization noise between the two paths is presented.
Proceedings ArticleDOI
A 20 MHz Bandwidth Continuous-Time Delta-Sigma ADC Achieving 82.1 dB SNDR and > 00 dB SFDR Using a Time-Interleaved Virtual-Ground-Switched FIR Feedback DAC
Alok Baluni,Shanthi Pavan +1 more
TL;DR: A single-bit continuous-time delta-sigma ADC that achieves 82.1 dB peak SNDR and 101.2 dB SFDR in a 65 nm CMOS process using a virtual-ground-switched resistive FIR feedback DAC to reduce power dissipation is presented.
Journal ArticleDOI
Thermal noise limit for time-domain analogue signal processing in CMOS technologies
TL;DR: In this article, the impact of thermal noise in voltage and time-domain analogue signal processing is discussed, and it is shown that in CMOS technologies voltage signal processing has a better fundamental limit compared with its time counterpart.
Proceedings ArticleDOI
Study of modified noise-shaper architectures for oversampled sigma-delta DACs
Nadeem Afzal,J. Jacob Wikner +1 more
TL;DR: Modified low-complex, hybrid architectures for digital, oversampled sigma-delta digital-to-analog converters (ΣΔDACs) are explored in terms of signal- to-noise ratio (SNR) and subDAC complexity and noise shaper complexity.
Journal ArticleDOI
Efficiency Enhancement of Sigma---Delta Modulator Based Transmitters Using Multi-Level Quantizers
TL;DR: It is found that the increase of the quantization level of the ΣΔ modulator from 2 to 5 leads to a substantial improvement in the measured power efficiency of the transmitter from 5% to 42%, in good agreement with simulated and measured results obtained using simulink and FPGA board respectively.
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.