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 255 for “"analog-to-digital"”.
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Floating-Point Analog-to-Digital Converter
To deal with the wide dynamic rage necessary for a radio receiver or corresponding applications, but to avoid impractically high resolution at high data rates, the approach of using a floating-point analog-to-digital converter (FP-ADC) has been investigated. This approach de-links the dynamic range …
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Pipelined oversampling analog-to-digital converters
… as [delta sigma] modulation, are widely used in analog-to-digital conversion to achieve accuracy that exceeds that of integrated-circuit components. Such converters have an inherent tradeoff between accuracy and speed, whereby resolution in amplitude is achieved at the expense of resolution in …
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Integrated photonic analog-to-digital converters
Accurate conversion of wideband multi-GHz analog signals into the digital domain has long been a target of analog-to-digital converter (ADC) developers, driven by applications in radar systems, software radio, medical imaging, and communication systems. Aperture jitter has been a major bottleneck …
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Integrated optical analog-to-digital converter
… frequency-demultiplexed wideband analog-to-digital converter (ADC) which has potential to exceed the performance of electronic ADCs by orders of magnitude is studied analytically and numerically. The accuracy of the ADC as a function of its parameters is analyzed and impact of …
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High-resolution analog-to-digital conversion techniques
Not available
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Dynamic amplifiers for analog-to-digital converters
… in CMOS technologies have brought benefits to both digital and analog integrated circuits. However, lower output impedance and reduced supply voltage have also caused newer challenges, especially for the design of operational amplifiers (op-amps) to implement gain. In this dissertation, …
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Analog to digital converters for CMOS imagers
… approach utilizing a single fast A/D converter to process all of the imager pixels. If power scales linearly with frequency in a given A/D architecture, power dissipation for the two approaches should be comparable. However, the serial approach should occupy less area since only the cost of one …
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A wide-range analog to digital converter
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1980
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Variable Precision Tandem Analog-to-Digital Converter (ADC)
<p>This paper describes an analog-to-digital signal converter which varies its precision as a function of input slew rate (maximum signal rate of change), in order to best follow the input in real time. It uses Flash and Successive Approximation (SAR) conversion techniques in sequence.</p> <p>As …
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High-Resolution Nyquist -Rate Analog -to -Digital Converter
This thesis presents a pipelined analog-to-digital converter (ADC) employing a capacitor error-averaging technique with look-ahead decision and digital error correction concepts that has been implemented in a CMOS technology to achieve high linearity and high speed. The capacitor error-averaging …
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A high-speed, folding, analog-to-digital converter
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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A low-power reconfigurable analog-to-digital converter
… concept, theory and design of a low power CMOS analog-to-digital converter that can digitize signals over a wide range of bandwidth and resolution with adaptive power consumption. The converter achieves the wide operating range by reconfiguring (1) its architecture between pipeline and …
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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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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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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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High-Speed, Low-Spurious CMOS Analog -to -Digital Converter
… the application of background offset trimming to folding ADCs. Background offset trimming with a delta-sigma modulator is applied to compensate the random input offset of folding amplifiers. A subranging front-end is used in conjunction with the pipelined folding ADC to make the calibration …
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BER-optimal analog-to-digital converters for communication links
In this thesis, we propose BER-optimal analog-to-digital converters (ADC) where quantization levels and thresholds are set non-uniformly to minimize the bit-error rate (BER). This is in contrast to present-day ADCs which act as transparent waveform preservers. We define the ADC shaping gain metric …
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A switched-capacitor pipelined BiCMOS analog-to-digital converter
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Flash analog-to-digital converters with time-based techniques
High-speed medium-resolution flash analog-to-digital converters (ADCs) are in high demand in today's wireless and wireline systems. Conventional flash ADCs suffer from limited resolution and high power consumption. This thesis investigates time-based techniques that enhance the performance of a …
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