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 Linearized Model for the Design of Fractional- $N$ Digital PLLs Based on Dual-Mode Ring Oscillator FDCs
TL;DR: A linearized model is derived of the new architecture and key equations which are necessary for the design of PLLs based on the architecture, well-suited to implementation in highly-scaled CMOS technology.
Patent
Quadrature bandpass delta sigma converter
TL;DR: In this article, an improved quadrature bandpass ΔΣ converter includes a loop filter, an ADC responsive to the loop filter and a first feedback DAC responsive to ADC; a first summing circuit is responsive to first DAC and an analog input for providing an input to loop filter.
Proceedings ArticleDOI
A very compact 1MS/s Nyquist-rate A/D-converter with 12 effective bits
TL;DR: A Nyquist-rate converter that requires only 1 operational amplifier and achieves 12-bit accuracy performance in 13 clock cycles with 9 bit capacitor matching is presented, to achieve an inherent accuracy of at least 12-bits without trimming or calibration.
Journal ArticleDOI
A Low-Power Continuous-Time Delta-Sigma Modulator Using a Resonant Single Op-Amp Third-Order Loop Filter
TL;DR: A third-order loop filter (LF) using a single op-amp resonator is presented for continuous-time delta-sigma modulators and improves both the power and area efficiencies by reducing the number of active components and simplifying the modulator topology.
Journal ArticleDOI
A 250-MHz Pipelined ADC-Based $f_{S}/4$ Noise-Shaping Bandpass ADC
Vineeth Sarma,Nevin Alex Jacob,Bibhu Datta Sahoo,Venkateswaran Narayanaswamy,Vikas Choudhary +4 more
TL;DR: A new-analog-to-digital converter (ADC) architecture is realized by feeding back the delayed quantization noise inherently produced by a pipelined ADC by means of a new bandpass.
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.