Index Catalog // ScholarsArchive@OSU

Low-power double-sampled delta-sigma modulator for broadband applications

Creator:: Shen, Weilun
Abstract:: High speed and high resolution analog-to-digital converter is a key building block for broadband wireless communications, high definition video applications, medical images and so on. By leveraging the down scaling of the latest CMOS technology and the noise shaping properties, delta-sigma (ΔΣ) ADCs are able to achieve wide-band operation and...
Resource Type:: Dissertation

Architectural compensation techniques for analog inaccuracies in delta-sigma analog-to-digital converters, Architectural compensation techniques for analog inaccuracies in ΔΣanalog-to-digital converters

Creator:: Maghari, Nima
Abstract:: Delta-sigma analog-to-digital converters (ADCs) are suitable for many applications due to several advantages such as relaxed anti-aliasing filter, high signal-to noise and distortion ratio (SNDR) and most important of all, reduced sensitivity to analog imperfections.This thesis introduces several structures to overcome loop imperfections and stability issues in delta-sigma modulators. First,...
Resource Type:: Dissertation

Design of low OSR, high precision analog-to-digital converters

Creator:: Rajaee, Omid
Abstract:: Advances in electronic systems have lead to the demand for high resolution, high bandwidth Analog-to-Digital Converters (ADCs). Oversampled ADCs are well- known for high accuracy applications since they benefit from noise shaping and they usually do not need highly accurate components. However, as a consequence of oversampling, they have limited...
Resource Type:: Dissertation

Novel structures for high-speed delta-sigma data converters

Creator:: Chae, Jeong Seok
Abstract:: As CMOS processes keep scaling down devices, the maximum operating frequencies of CMOS devices increase, and hence circuits can process very wide band signals. Moreover, the small physical dimensions of transistors allow the placing of many more blocks into a single chip, including highly accurate analog blocks and complicated digital...
Resource Type:: Dissertation

Wide-bandwidth, high-resolution delta-sigma analog-to-digital converters

Creator:: Zanbaghi, Ramin
Abstract:: There is a significant need in recent mobile communication and wireless broadband systems for high-performance analog-to-digital converters (ADCs) that have wide bandwidth (BW>5-MHz) and high data rate (>100-Mbps). A delta-sigma ADC is recognized as a power-efficient ADC architecture when high resolution (>12-b) is required. This is due to several advantages...
Resource Type:: Dissertation

Low-power high-resolution delta-sigma ADC design techniques

Creator:: Wang, Tao
Abstract:: This dissertation presents a low-power high-resolution delta-sigma ADC. Two new architectural design techniques are proposed to reduce the power dissipation of the ADC. Compared to the conventional active adder, the direct charge transfer (DCT) adder greatly saves power by keeping the feedback factor of the active adder unity. However, the...
Resource Type:: Dissertation

High efficiency wideband low-power delta-sigma modulators

Creator:: 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

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

Creator:: 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

Wideband and high accuracy delta sigma modulation data converter

Creator:: 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

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

Creator:: 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

Architectural Solutions for Analog Imperfections in ΔΣ Analog-to-Digital Based Systems

Creator:: Zali Asl, Samira
Abstract:: For today’s ubiquitous portable devices, innovative integrated circuits with high performance yet very low power are necessary. As these devices are used to communicate and sense real world signals in the environment, analog-to-digital converters (ADC) and systems are the key interface circuits needed to digitize the sensed information and they...
Resource Type:: Dissertation

ScholarsArchive@OSU

Low-power double-sampled delta-sigma modulator for broadband applications

Architectural compensation techniques for analog inaccuracies in delta-sigma analog-to-digital converters, Architectural compensation techniques for analog inaccuracies in ΔΣanalog-to-digital converters

Design of low OSR, high precision analog-to-digital converters

Novel structures for high-speed delta-sigma data converters

Wide-bandwidth, high-resolution delta-sigma analog-to-digital converters

Low-power high-resolution delta-sigma ADC design techniques

High efficiency wideband low-power delta-sigma modulators

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

Wideband and high accuracy delta sigma modulation data converter

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

Architectural Solutions for Analog Imperfections in ΔΣ Analog-to-Digital Based Systems

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