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 22 for “"Digital-to-analog converters"”.
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An analysis of interconnection network effects of dynamic element matching digital-to-analog converters
Digital-to-Analog Converters (DACs) convert digital signals into analog signals and thereby provide the link from digital systems to the analog world. Many DAC architectures use matched components to convert signals. However, practical DACs contain mismatched circuit components that cause nonlinear …
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Wide common mode input operational amplifier with serially programmable output offset
Operational amplifiers continue to develop to meet modern demands on performance. This document describes an operational amplifier designed for a highly specific telecommunications application - to serve as the buffer between an I/Q demodulator and Gm-C filter. Requirements set forth by this …
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Design and prototype of an all digital system for baseband FM multiplex signal demodulation
The continuing increase in transistor densities and operation frequencies of digital circuits is leading to the replacement of many analog circuits by their digital circuit counterparts. This trend can be attributed to the flexibility and robustness provided by digital circuits over analog …
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A comparator-based switched-capacitor pipelined analog-to-digital converter
A new comparator-based switched-capacitor(CBSC) technique is proposed that eliminates the need for high gain op-amps in switched-capacitor circuits. The CBSC technique replaces the op-amp in switched-capacitor circuits with a comparator and a current source. Compared to op-amps, comparators suffer …
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Low phase noise, high bandwidth frequency synthesis techniques
… that allows fractional-N frequency synthesizers to achieve high closed loop bandwidth and low output phase noise simultaneously. Quantization induced phase noise is the bottleneck in state-of-the-art synthesizer design, and results in a noise-bandwidth tradeoff that typically limits closed loop …
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Signal generation and evaluation using Digital-to-Analog Converter and Signal Defined Radio
In contemporary communication systems, Digital-to-Analog Converters (DAC), Signal Defined Radio (SDR) signal creation, and clock data recovery are essential components. DACs convert digital signals to analog signals, creating continuous waveforms. DACs provide versatility in the transmission of SDR …
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A digital up-conversion architecture for future high efficiency wireless base stations
… communications with higher data rates and ubiquitous coverage, and these must be achieved at reduced cost and with a lower carbon footprint. This evolution in wireless demand places a big burden on transmitter architectures. The need for higher efficiency has stimulated research into the …
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2GHz W-CDMA Radio Transceiver
… the functions of modulation and demodulation to enable transmitting and receiving digital information through the air link. The radio comprises one transmitter in conjunction with transmit power control (TPC), two independent receivers in conjunction with automatic gain control (AGC) and …
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Digitally enhanced CMOS RF transmitter with integrated power amplifier
… an integrated feedback path, a two-dimensional, digital look-up table (2-D LUT) adapted by complex gradient-descent algorithms compensates the I/Q mismatch and memoryless nonlinearities of the whole transmit path, including the severe amplitude and phase distortions of the on-chip PA. Fifth-order …
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Hardware Security with Electromagnetic Side Channels
… a novel quantum diamond microscope are used to protect the integrated circuit supply chain by detecting hardware trojans with high spatial resolution, a wide field of view, and high sensitivity. A hardware trojan detection framework is developed that allows for automated and unbiased …
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Theory and applications of delta-sigma analogue-to-digital converters without negative feedback
Analog-to-digital converters play a crucial role in modern audio and communication design. Conventional Nyquist converters are suitable only for medium resolutions and require analog components that are precise and highly immune to noise and interference. In contrast, oversampling converters can …
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Radio frequency digital to analog converter
… performance of high speed, high resolution digital-to-analog converters (DACs) is limited by distortion at the data switching instants. Inter-symbol interference (ISI), imperfect timing synchronization and clock jitter are all culprits. A DAC output current controlled by an oscillating …
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Optimizing Ion-Shuttling Operations in Trapped-Ion Quantum Computers
… trap with many independent zones provides a path towards large-scale integration. A crucial element in the operation of a trap array is the ability to split, move and recombine chains of ions on diabatic timescales and without incurring excessive decoherence of information stored in ion qubits. In …
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Digital calibration of nonlinear memory errors in sigma-delta ADCs
Background digital calibration techniques based on an output-referred error model are proposed to linearize sigma-delta (ΣΔ) modulators. A sequential power series (a special form of Volterra series) is found sufficient to model the nonlinear memory errors in a discrete-time integrator (DTI), which …
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Wideband RF Front End Daughterboard Based on the Motorola RFIC
The goal of software-defined radio (SDR) is to move the processing of radio signals from the analog domain to the digital domain — to use digital microchips instead of analog circuit components. Until faster, higher-precision analog-to-digital (ADCs) and digital-to-analog converters (DACs) become …
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Fast simulation of stochastic biochemical reaction networks on cytomorphic chips
… or loading; they exhibit high levels of stochasticity (noise) that require ex- pensive Gillespie algorithms and random-number generation for accurate simulations; and, they routinely operate with nonlinear statics and dynamics. Hence, such simulations are extremely computationally …
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Assessment and Analysis of Commercial Off the Shelf Devices for Space Applications
… in various settings, from low-Earth orbit to deep-space missions. However, the harsh radiation environment in space exposes electronic systems to intense cosmic rays and solar radiation, which poses significant risks of damage and failure. Ensuring the reliability and efficiency of these …
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Performance enhancement strategies for design and test Optimization of analog and mixed-signal circuits
There has been an increasing demand for analog circuits, which can be attributed to the ever-increasing number of Internet of Things (IoT) devices and advancements in consumer electronics. This surge in demand is coupled with an industry-wide push for smaller chip designs that maintain or even …
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Reconfigurable Discrete-time Analog FIR filters for Wideband Analog Signal Processing
… a possible solution, it may not be practical due to the excessive requirements for analog-to-digital converter (ADCs) and digital filters for wideband signals. In this environment, discrete-time (DT) domain circuits are gaining attention in various architectures such as N-path filters, sampling …
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Design and demonstration of integrated micro-electro-mechanical relay circuits for VLSI applications
Complementary-Metal-Oxide-Semiconductor (CMOS) feature size scaling has resulted in significant improvements in the performance and energy efficiency of integrated circuits in the past 4 decades. However, in the last decade and for technology nodes below 90 nm, the scaling of threshold and supply …
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