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 Pixel Pitch-Matched Ultrasound Receiver for 3-D Photoacoustic Imaging With Integrated Delta-Sigma Beamformer in 28-nm UTBB FD-SOI
Man-Chia Chen,Aldo Pena Perez,Sri Rajasekhar Kothapalli,Philippe Cathelin,Andreia Cathelin,Sanjiv S. Gambhir,Boris Murmann +6 more
TL;DR: A pixel pitch-matched readout chip for 3-D photoacoustic (PA) imaging, featuring a dedicated signal conditioning and delta-sigma modulation integrated within a pixel area of 250, that obviates the need for area-consuming Nyquist ADCs and enables an efficient in-pixel A/D conversion.
Journal ArticleDOI
74 dB SNDR Multi-Loop Sturdy-MASH Delta-Sigma Modulator Using 35 dB Open-Loop Opamp Gain
TL;DR: A new multi-loop delta-sigma modulator which overcomes the necessity of high DC gain opamps that were needed in previous multi- Loop modulators and combines stability advantage of the multi- loop structure with relaxed circuit requirement of the single-loop modulator.
Journal ArticleDOI
A 1.05 V 1.6 mW, 0.45 $^{\circ}$ C 3 $\sigma$ Resolution $\Sigma\Delta$ Based Temperature Sensor With Parasitic Resistance Compensation in 32 nm Digital CMOS Process
TL;DR: A temperature sensor in a 32 nm high-k metal gate digital CMOS process for integration in a microprocessor core using a ratio of currents driven into a BJT pair with current chopping to up-convert the temperature signal.
Journal ArticleDOI
Programmable Analog-to-Digital Converter for Low-Power DC–DC SMPS
TL;DR: An application-specific delay-line based windowed analog-to-digital converter (ADC) with programmable reference voltage, conversion time, and accuracy of voltage regulation, is introduced in this paper.
Journal ArticleDOI
Power Reduction in Continuous-Time Delta-Sigma Modulators Using the Assisted Opamp Technique
Shanthi Pavan,Prabu Sankar +1 more
TL;DR: The “assisted opamp” integrator is introduced, which is a way of achieving low distortion operation with low power consumption and circuit implementations of the technique for single-bit modulators using NRZ and switched-capacitor-resistor feedback DACs are 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.