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 14 of 14 for “"A/D Conversion"”.
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Increasing A/D conversion resolution by dynamic scale adjustment
Dual-Ranging analog-to-digital systems create performance gains by exploiting the dynamic range of certain classes of signals. This thesis explores the improvements possible when using a dual-ranging system to gain resolution when digitizing audio waveforms. Experiments indicate between 3 to 6 dB …
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Statistically robust Pseudo Linear Identification
… from device to microprocessor fails or the A/D conversion fails. In these cases the noise will no longer be Gaussian distributed, but rather the noise will be a mixture of Gaussian noise and data not related to the physical process. This posses a problem for estimators derived under the Gaussian …
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Secure analog-to-digital conversion against power side-channel attack
… of the SAR ADC into the corresponding A/D conversion results with very high accuracy, demonstrating themselves as powerful ADC PSA methods. Secondly, this thesis proposes a current-equalizer-based SAR ADC PSA countermeasure. A 12-bit, 1.25MS/s prototype SAR ADC is implemented in 65nm CMOS …
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Continuous-Time Delta-Sigma Modulators for Wireless Communication
… filtering ADC provides both filtering and A/D conversion, which suggests that the A/D conversion is included in a power efficient manner, broadly speaking "for free".
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System demonstration of an optically-sampled, wavelength-demultiplexed photonic analog-to-digital converter
… wavelength-demultiplexing approach to A/D conversion, which is explored in this thesis, offers key benefits such as ease of scalability to higher aggregate sampling rates via passive wavelength-division demultiplexing (WDM) filters and potential for full integration via silicon photonics …
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Analysis and Dynamic Range Enhancement of the Analog-to-Digital Interface in Multimode Radio Receivers
The rapidly developing wireless market has spawned a multitude of different standards for cellular, PCS, and wireless data. To allow users the ability to access services conforming to disparate standards, multimode handsets capable of software reconfiguration are needed. These "software radios" are …
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Wide-Dynamic-Range Continuous-Time Delta-Sigma A/D Converter for Low-Power Energy Scavenging Applications
… with simultaneous wide-dynamic-range A/D conversion, using programmable reference currents and programmable clock frequencies. </p><p>A programmable current-input wide-dynamic-range Delta-Sigma A/D converter is designed and fabricated using MOSIS AMI 1.5 um 5 V CMOS process. The …
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A subsampling delta-sigma modulator for global navigation satellite systems
… for subsampling Analog-to-Digital (A/D) conversion as it provides noise-shaping and inherent Anti-Alias (AA) filtering. However, the attenuation of the RF alias in the feedback path of the modulator and the reduction of the effective Quality (Q-factor) of the loop filter prevent …
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Time-based circuits for communication systems in advanced CMOS technology
… Ring oscillators are employed in analog-to-time conversion or time-to-digital conversion. In this work, we present A/D converters and an RF modulator based on ring oscillators in deep sub-micron CMOS processes. We introduce a VCO-based [sigma][delta] A/D converter utilizing a voltage-controlled …
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Precision hybrid pipelined ADC
… improve the power-linearity tradeoff of the A/D conversion. The first phase approximates the final output value, while the second phase allows the output to settle to its accurate value. Since the output is allowed to settle in the second phase, the currents through capacitors decay, permitting …
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Design and Analysis of Charge-Transfer Amplifiers for Low-Power Analog-to-Digital Converter Applications
<p>The demand for low-power A/D conversion techniques has motivated the exploration of charge-transfer amplifiers (CTAs) to construct efficient, precise voltage comparators. Despite notable advantages over classical, continuous-time architectures, little is understood about the dynamic behavior of …
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Low-power high-performance SAR ADC design with digital calibration techniques
… mismatch errors in the analog-to-digital (A/D) conversion. They enable aggressive scaling of the capacitive digital-to-analog converter (DAC), which also serves as sampling capacitor, to the kT/C limit. As a result, outstanding conversion linearity, high signal-to-noise ratio (SNR), high …
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Accelerated deep learning for the edge-to-cloud continuum: A specialized full stack derived from algorithms
… to noise, and Analog to Digital (A/D) conversion overheads.
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An implantable micro-system for neural prosthesis control and sensory feedback restoration in amputees
… each including the analog front-end and the A/D conversion based on a sigma delta architecture. It has a total area of 16.8mm2 and exhibits an overall power consumption of 27.2mW. The neural stimulation IC is able to provide biphasic current pulses to stimulate 8 electrodes independently. A …