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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Journal ArticleDOI
A Highly Linear Multi-Level SC DAC in a Power-Efficient Gm-C Continuous-Time Delta-Sigma Modulator
TL;DR: To the best of the knowledge, this is the first silicon-proven CTDSM with a more-than-3-level DAC that leads to an excellent SFDR while not requiring dynamic element matching, component calibration, precise reference voltages, or an operating frequency higher than the modulator’s sampling frequency.
Journal ArticleDOI
Automated synthesis of discrete-time sigma-delta modulators from system architecture to circuit netlist
TL;DR: Experimental results show that the peak signal-to-noise and distortion ratio (PSNDR) of the fourth-order feed-forward (FF) SDM with an oversampling ratio (OSR) of 64 and a bandwidth of 20KHz estimated by the proposed synthesis tool is 94.19dB, and the result of the circuit simulation with folded-cascode op-amp is 93.03dB.
Proceedings ArticleDOI
Delta-sigma noise shaping in 2D spacetime for uniform linear aperture array receivers
TL;DR: In this paper, a multi-dimensional noise-shaping method based on delta-sigma modulation has been proposed, which employs lossless discrete integrators for realization in microwave and mm-wave array processing systems.
Proceedings ArticleDOI
Bit-level optimized FIR filter architectures for high-speed decimation applications
Anton Blad,Oscar Gustafsson +1 more
TL;DR: A bit-level optimization algorithm is introduced, and applied to the direct form and transposed form FIR filter architectures, and two conclusions can be drawn.
Journal ArticleDOI
Efficient Broadband Current-Mode Adder- Quantizer Design for Continuous-Time Sigma–Delta Modulators
Chang-Joon Park,Marvin Onabajo,Hemasundar Mohan Geddada,Aydin Ilker Karsilayan,Jose Silva-Martinez +4 more
TL;DR: Results show that the proposed current-mode approach is faster than the conventional voltage-mode flash approach, and it requires a smaller input capacitance while consuming 53% less power.
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.