Index Catalog // Hyrax

Efficient use of time information in analog-to-digital converters

O Criador:: Hu, Yue
Abstract:: Time-domain data conversion has recently drawn increased research attention for its highly digital nature in favor of process technology scaling. Also, as the time information being carried by binary voltage, time-domain operation is much less sensitive to voltage noise compared to conventional voltage domain operation. However, for analog-to-digital converter (ADC)...
Resource Type:: Dissertation

Wideband and high accuracy delta sigma modulation data converter

O Criador:: Jung, Youngho
Abstract:: Nowadays, needs for wideband and high accuracy analog-to-digital converter are increasing rapidly in manifold applications such as wireless communication, digital video and other consumer electronics. Besides, low power consumption is required to have longer battery life in portable systems. CMOS technology scaling and innovative modulator topology make the implementation much...
Resource Type:: Dissertation

Design techniques for delta sigma modulators using VCO based ADCs

O Criador:: Reddy, Karthikeyan
Abstract:: VCO-based ADCs have recently emerged as attractive alternative to conventional DeltaSigma (ΔΣ) modulator architectures. Few salient features of a VCObased ADC are: 1) the quantization noise is 1st order noise shaped, 2) it is an open loop architecture, and, 3) its implementation is mostly digital in nature. Hence, they are...
Resource Type:: Dissertation

Design techniques for time based data converters

O Criador:: Gande, Manideep
Abstract:: Modern day CMOS processes are characterized by voltage scaling and geometry scaling. Geometry scaling helps reduce gate delays, thereby aiding in the design of data converters which use time based processing. Another artifact of geometry scaling is the increase in complexity of digital circuitry available on traditional analog ICs, as...
Resource Type:: Dissertation

Time-based noise-shaping techniques for time-to-digital and analog-to-digital converters

O Criador:: Young, Brian LeRoy
Abstract:: In this dissertation, time-based signal processing techniques and their applications in oversampling and noise-shaping data converters are examined. These techniques demonstrate the ability to shift the burden of high performance analog circuits from the compressed voltage-domain to the augmented time-domain. First, the potential of high order noise-shaping and phase-domain feedback...
Resource Type:: Dissertation

Power efficient analog-to-digital converters using both voltage and time domain information

O Criador:: Oh, Taehwan
Abstract:: As advanced wired and wireless communication systems attempt to achieve higher performance, the demand for high resolution and wide signal bandwidth in their associated ADCs is strongly increased. Recently, time-domain quantization has drawn attention from its scalability in deep submicron CMOS processes. Furthermore, there are several interesting aspects of time-domain...
Resource Type:: Dissertation

Linearizing techniques for voltage controlled oscillator based analog to digital converters

O Criador:: Rao, Sachin B.
Abstract:: Voltage controlled oscillator (VCO) based ADC is an important class of time-domain ADC that has gained widespread acceptance due to their several desirable properties. VCO-based ADCs behave like an open-loop continuous time ΔΣ modulator and achieve excellent resolution by first order noise shaping the quantization error. However, the SNDR of...
Resource Type:: Dissertation

Time and statistical information utilization in high efficiency sub-micron CMOS successive approximation analog to digital converters

O Criador:: Guerber, Jon
Abstract:: In an industrial and consumer electronic marketplace that is increasingly demanding greater real-world interactivity in portable and distributed devices, analog to digital converter efficiency and performance is being carefully examined. The successive approximation (SAR) analog to digital converter (ADC) architecture has become popular for its high efficiency at mid-speed and...
Resource Type:: Dissertation

A fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs

O Criador:: Wang, Xuesheng
Abstract:: This thesis proposes a novel fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs. The structure of the DAC error is indicated through a simple model for unit-element based DACs. The impact of the DAC error on the performance of ADC is...
Resource Type:: Dissertation

High efficiency wideband low-power delta-sigma modulators

O Criador:: Lee, Sang Hyeon
Abstract:: Delta-sigma analog-to-digital converters traditionally have been used for low speed, high resolution applications such as measurements, sensors, voice and audio systems. Through continued device scaling in CMOS technology and architectural and circuit level design innovations, they have even become popular for wideband, high dynamic range applications such as wired and...
Resource Type:: Dissertation

Hyrax

Efficient use of time information in analog-to-digital converters

Wideband and high accuracy delta sigma modulation data converter

Design techniques for delta sigma modulators using VCO based ADCs

Design techniques for time based data converters

Time-based noise-shaping techniques for time-to-digital and analog-to-digital converters

Power efficient analog-to-digital converters using both voltage and time domain information

Linearizing techniques for voltage controlled oscillator based analog to digital converters

Time and statistical information utilization in high efficiency sub-micron CMOS successive approximation analog to digital converters

A fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs

High efficiency wideband low-power delta-sigma modulators

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