Index Catalog // ScholarsArchive@OSU

5th-Order Elliptic LPF Using Passive Charge Compensation Technique (PCC) Design

Creator:: Tsai, Cheng H.
Abstract:: The passive charge compensation (PCC) technique was introduced for switched capacitor (SC) circuit to increase the slew rate and enhance the linearity performance, as PCC techniques are used on the Delta-Sigma modulator (DSM) in ADC circuitry. The PCC technique of the project was applied to the design of a SC...
Resource Type:: Masters Thesis

A 90.5dB DR 1MHz BW Hybrid Two Step ADC with CT Incremental and SAR ADCs

Creator:: Wang, Yanchao
Abstract:: The sensors in real time data processing IoT devices require high resolution and sub-MHz data converters, usually implemented as Incremental ADCs due to the advantages of oversampling technique and low latency. In discrete time incremental (IDT) ADCs, the sampling switch non-linearity, charge injection degrade the resolution, and power hungry OPAMPs...
Resource Type:: Dissertation

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

Creator:: 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

A multi-bit delta sigma audio digital-to-analog converter

Creator:: Wang, Ruopeng
Abstract:: Digital-to-analog converters (DACs) with wide dynamic range and high linearity are required for high-end audio applications. A multi-bit delta sigma audio DAC, using a novel gain-correction technique, is described in this thesis. For widely varying on-chip RC time constant, the DAC gain can be accurately controlled by the correction circuitry....
Resource Type:: Dissertation

A study of basic building blocks of analog-to-digital delta-sigma modulators

Creator:: Guo, Yuhua
Abstract:: In this thesis, a novel Direct-Charge-Transfer (DCT) integrator structure is proposed, which can settle much faster than regular switch-capacitor integrators. A new Spread-Spectrum Dynamic Element Matching (SS-DEM) algorithm is also introduced, which can effectively spread or shape the nonlinearity error of multi-bit DAC in the feedback path, thus improve the...
Resource Type:: Masters Thesis

A wideband low-power continuous-time delta-sigma modulator for next generation wireless applications

Creator:: Chen, Xuefeng
Abstract:: Delta-Sigma (ΔΣ) analog-to-digital converters (ADCs) are widely used in wireless transceivers. Recently, continuous-time (CT) ΔΣ ADCs gain growing interest in wireless applications for their lower power consumption and wider input bandwidth as compared with the discrete-time (DT) counterparts. In this thesis, a wideband low-power CT ΔΣ modulator for next generation...
Resource Type:: Dissertation

Active Noise Shaping Analog-to-Digital Data Converters

Creator:: Shi, Lukang
Abstract:: Successive-approximation-register (SAR) analog-to-digital converters are popular for medium accuracy, medium speed and low power applications, such as in biomedical applications. They have low latency and simple architecture compared with ΔΣ ADCs. This is because of SAR ADCs’ binary searching scheme. Furthermore, SAR ADCs can apply oversampling and noise shaping schemes...
Resource Type:: Dissertation

Analysis and measurement of charge injection in switched-capacitor circuits

Creator:: Shen, Min
Abstract:: It has been verified by theoretical analysis, circuit simulation and test that two switch transistors in parallel in a simple sample and hold circuit can be achieve high speed with low error voltage due to charge injection. The wide transistor provides low RC time constant when it is closed and...
Resource Type:: Masters Thesis

Compensation techniques for cascaded delta-sigma A/D converters and high-performance switched-capacitor circuits

Creator:: Sun, Tao
Abstract:: This thesis describes compensation techniques for cascaded delta-sigma A/D converters (ADCs) and high-performance switched-capacitor (SC) circuits. Various correlated-double-sampling (CDS) techniques are presented to reduce the effects of the nonidealities, such as clock feedthrough, charge injection, opamp input-referred noise and offset, and finite opamp gain, in SC circuits. A CDS technique...
Resource Type:: Dissertation

Design of high efficiency step-down switched capacitor DC/DC converter

Creator:: Ma, Mengzhe
Abstract:: Recently, switched capacitor DC/DC converters are extensively used in portable electronic devices because they feature many advantages, such as high efficiency, small package, low quiescent current, minimal external components and low cost. In this thesis, two step-down switched capacitor DC/DC converters are designed. One has the fixed output options 1.5V,...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

5th-Order Elliptic LPF Using Passive Charge Compensation Technique (PCC) Design

A 90.5dB DR 1MHz BW Hybrid Two Step ADC with CT Incremental and SAR ADCs

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

A multi-bit delta sigma audio digital-to-analog converter

A study of basic building blocks of analog-to-digital delta-sigma modulators

A wideband low-power continuous-time delta-sigma modulator for next generation wireless applications

Active Noise Shaping Analog-to-Digital Data Converters

Analysis and measurement of charge injection in switched-capacitor circuits

Compensation techniques for cascaded delta-sigma A/D converters and high-performance switched-capacitor circuits

Design of high efficiency step-down switched capacitor DC/DC converter

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