Journal ArticleDOI
A fourth-order single-bit switched-capacitor /spl Sigma/-/spl Delta/ modulator for distributed sensor applications
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A switched-capacitor sigma-delta (/spl Sigma/-/spl Delta/) modulator for high resolution applications, well suited for distributed sensor networks.Abstract:
In this paper, we present a switched-capacitor sigma-delta (/spl Sigma/-/spl Delta/) modulator for high resolution applications. In particular, this /spl Sigma/-/spl Delta/ modulator is well suited for distributed sensor networks. The circuit, implemented in a double-poly, double-metal 0.6 /spl mu/m CMOS technology, is based on a fourth-order single-loop architecture with a sampling frequency of 256 kHz. The chip consumes 50 mW from a single 5-V supply and achieves a signal-to-noise ratio of 104.9 dB over a bandwidth of 400 Hz, corresponding to a resolution of 17.1 bits.read more
Citations
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Journal ArticleDOI
Electromechanical Sigma–Delta Modulators ( $\Sigma \Delta {\mathrm{ M}}$ ) Force Feedback Interfaces for Capacitive MEMS Inertial Sensors: A Review
TL;DR: This paper provides a comprehensive review of EM-ΣAM interfaces for capacitive MEMS inertial sensors and the properties of various discrete and continuous-time techniques and a system parameter optimization methodology are illustrated through specific examples.
Journal ArticleDOI
A state of the art on ADC modelling
TL;DR: The state of the art of the research on modelling of analog-to-digital converter (ADC)-based measuring devices is surveyed and recent developments are analysed with the aim of focusing both the contemporary situation and the imminent trends.
Journal ArticleDOI
Micromachined Vibratory Gyroscopes Controlled by a High-Order Bandpass Sigma-Delta Modulator
TL;DR: A control system based on a high-order bandpass Sigma DeltaM is superior as it not only greatly shapes the quantization noise, but also alleviates tonal behavior, as is often seen in low-order SigmaDeltaM control systems, and has good immunities to fabrication tolerances and parameter mismatch.
Journal ArticleDOI
Doppler Radar Motion Sensor With CMOS Digital DC-Tuning VGA and Inverter-Based Sigma-Delta Modulator
TL;DR: Experiments show that the presented digital dc-tuning VGA can completely relieve the radar sensor from circuit saturation and the inverter-based sigma-delta modulator can perform under low voltage and low power to accurately detect the movement frequency of the target without a decimation filter.
Journal ArticleDOI
A 99-dB DR Fourth-Order Delta–Sigma Modulator for 20-kHz Bandwidth Sensor Applications
TL;DR: A fourth-order single-bit delta-sigma modulator is presented for sensor applications, targeted for high-accuracy and wide-bandwidth sensor applications such as the resistor-based current sensors and the Hall-effect sensors in motor control systems.
References
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Book
Delta-sigma data converters : theory, design, and simulation
TL;DR: Delta-Sigma Data Converters provides comprehensive coverage of low and high-order single-bit, bandpass, continuous-time, multistage modulators as well as advanced topics, including idle-channel tones, stability, decimation and interpolation filter design, and simulation.
Journal ArticleDOI
Behavioral modeling of switched-capacitor sigma-delta modulators
Piero Malcovati,S. Brigati,F. Francesconi,Franco Maloberti,Paolo Cusinato,Andrea Baschirotto +5 more
TL;DR: This paper presents a complete set of blocks implemented in the popular MATLAB SIMULINK environment, which allows designers to perform time-domain behavioral simulations of switched-capacitor sigma-delta (/spl Sigma//spl Delta/) modulators.
Journal ArticleDOI
A high-speed CMOS comparator with 8-b resolution
TL;DR: In this article, a comparator consisting of a differential input stage, two regenerative flip-flops, and an S-R latch is presented, which reduces the power consumption as well as the die area and increases the comparison speed.
Journal Article
Principles of oversampling A/D conversion
TL;DR: The overall problem of performing signal acquisition with real hardware is reviewed, and the ways in which oversampling facilitates this task, sometimes counterintuitively, are reviewed.