Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"Analog-to-digital conversion"”.
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High-resolution analog-to-digital conversion techniques
Not available
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Techniques for Reliable and Efficient Analog to Digital Conversion
Analog-to-Digital conversion (ADC) is an essential process in signal processing. It converts analog signals in the real world to digital codes that can be conveniently processed by digital systems. Among various ADC architectures, pipelined ADC is very attractive since it can achieve high …
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Redundant analog to digital conversion architectures in CMOS technology
… with robust, high performance and scalable Analog-to-Digital Converter (ADCs), that can be considered as one of the main blocks in many systems, since they are mandatory to make the link between the analog outside world and the evermore-ubiquitous digital computer world. The design of these …
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Secure analog-to-digital conversion against power side-channel attack
At the interface between analog circuits and a digital processor, an ADC can create a critical hardware security loophole. By exploiting the power side-channel leakage of the ADC, an attacker can expose the private signal chain data. Having recognized the security threat, this thesis explores both …
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Energy-efficient analog-to-digital conversion for ultra-wideband radio
… and communication systems, a focus on the analog or digital circuits in isolation cannot achieve the minimum power consumption. Furthermore, in advanced technologies with significant variation, yield is traditionally achieved only through conservative design and a sacrifice of energy …
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A distributed bipolar device for monolithic analog-to-digital conversion
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1984.
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A Parallel Architecture for Analog-to-Digital Conversion with Improved Dynamic Range
In this thesis, a parallel architecture for Analog-to-Digital Converters (ADCs) is developed to increase the system dynamic range. The proposed architecture is a critical component for a Continuous Wave Stepped Frequency (CWSF) radar system. Existing Commercial Off-The-Shelf (COTS) components are …
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Low-Spurious Analog-to-Digital Conversion Using Multi-Stage Code-Error Calibration
… alleviates the requirements for initial capacitor matching and residue amplifier settling accuracy. The two 5-bit MSB stages are digitally calibrated to implement a 15-bit, 5 Msample/s low-spurious ADC using 1.4 $\mu$m CMOS. A skip-and-fill algorithm with non-linear interpolation also opens up …
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A hybrid quadrature mirror filter bank approach to analog-to-digital conversion
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Tunable narrow bandpass Sigma-Delta analog-to-digital conversion for mobile communication terminals
… for this application. The ΣΔ ADC must be able to null the quantization noise at the frequency of the desired channel. The research considers the feasibility of varying this frequency for tuning different channels. This is a novel concept for ΣΔ systems and so the simplest form of ΣΔ structure …
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Design of a Low Power Delta Sigma Modulator for Analog to Digital Conversion
… of multiple devices on the same chip. Analog to Digital conversion is essential to interfacing digital systems to external devices such as sensors. This presents a difficulty since high precision analog devices do not mix well with high speed digital circuits. The digital environment …
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A wide dynamic range CMOS imager with parallel on-chip analog-to-digital conversion
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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A superconducting bandpass delta-sigma modulator for direct analog-to-digital conversion of microwave radio
Direct analog-to-digital conversion of multi-GHz radio frequency (RF) signals is the ultimate goal in software radio receiver design but remains a daunting challenge for any technology. This thesis examines the potential of superconducting technology for realizing RF analog-to-digital converters …
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True linearized intensity modulation for photonic analog to digital conversion using an injection-locked mode-locked laser
A true linearized interferometric intensity modulator for pulsed light has been proposed and experimentally presented in this thesis. This has been achieved by introducing a mode-locked laser into one of the arms of a Mach-Zehnder interferometer and injection-locking it to the input light (which is …
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A pixel-level A/D converter for the imaging array of an advanced interferometer
The objective of this thesis is to investigate the feasibility of pixel-level analog-to-digital conversion as a solution for the imaging array of the advanced interferometer project at Lincoln Laboratory. Six different pixel-level analog-to-digital conversion methods are examined. Four of the …
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A time-based energy-efficient analog-to-digital converter
Dual-slope converters use time to perform analog-to-digital conversion but require 2N+1 clock cycles to achieve N bits of precision. We describe a novel algorithm that also uses time to perform analog-to-digital conversion but requires 5N clock cycles to achieve N bits of precision via a successive …
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The Proteretic Hopfield Neural Network Analog to Digital Converter
… and the efficiency of employing these neurons in analog to digital conversion, via the Hopfield Neural Network, will be demonstrated. Traditional hysteresis is defined, generally, as the occurrence of a delayed effect when forces acting on an object are varied. It will be shown that predictive …
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3 GHz Yb-fiber laser based femtosecond sources and frequency comb
Many applications require femtosecond lasers of high repetition rate. In the time domain, a higher repetition rate means more pulses in a fixed time period. For nonlinear bio-optical imaging in which photo-induced damage is caused by pulse energy rather than average power, increasing pulse …
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High energy femtosecond fiber laser at 1018 nm and high power Cherenkov radiation generation
… double-cladd amplifier and an appropriate filter to optimize the system for the amplifier seeding application were employed. This is the highest pulse energy with narrow spectrum at 1018 nm. For a photonic analog-to-digital conversion system operating at 1250 nm, a fiber laser system generating 4 …
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RF test methods for balanced receivers for swept source optical coherence tomography
Optical coherence tomography (OCT) has risen as a clinical standard of diagnosis and management of ocular diseases since its development in 1991 by the MIT group and the collaborators. Since current cutting-edge OCT technology based on frequency-swept lasers has achieved scanning rate over …
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