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High-Performance Multilevel Class-D Audio Amplifiers

Zhang, H. (author)

This thesis describes the analysis, design, prototype implementation, and measurement results of high-performance Class-D amplifiers (CDAs) for audio applications.

doctoral thesis 2024

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Power-Efficient Amplifiers for Data Converters

Akter, S. (author)

This thesis describes the design and implementation of power-efficient discrete-time amplifiers for data converter systems.

doctoral thesis 2021

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The Zoom ADC: An Energy Efficient ADC for High Resolution

Gonen, B. (author)

Analog-to-digital converters (ADCs) are an indispensable part of the digital age we are living in, as they form the interface between physical reality and virtual reality. Higher ADC energy efficiency is the dominant focus of ADC design research due to the high impact of ADC energy consumption to total energy consumption of the systems they are...

doctoral thesis 2021

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Calibration Techniques for Power-efficient Residue Amplifiers in Pipelined ADCs

Sehgal, R.K. (author)

Residue amplification plays a key role in determining the energy efficiency, area and performance of high-speed pipelined ADCs. At its core, a residue amplifier simply consists of four transistors that transfer a differential input voltage to a capacitive load with the desired gain. However, in order to ensure gain accuracy over PVT, the core...

doctoral thesis 2021

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Resistor-based Temperature Sensors in CMOS Technology

Pan, S. (author)

This thesis describes the design and implementation of integrated temperature sensors based on the temperature dependency of CMOS resistors.

doctoral thesis 2021

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Integrated High-Side Current Sensors

Xu, L. (author)

This thesis describes the design and implementation of integrated high-side current sensors for IoT applications. As explained in chapter 1, the main challenges are the need to achieve low power, low cost and low area while maintaining a reasonably low gain error. To meet them, the focus of this thesis is on (1) the design of precision HV...

doctoral thesis 2020

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Readout circuits for hot-wire carbon dioxide sensors in CMOS technology

Cai, Z. (author)

This thesis describes the design and realization of CMOS-compatible CO2 sensors based on thermal conductivity (TC) measurement for indoor air-quality sensing. The goal of this work is to investigate the advantages and limitations of sensing CO2 based on TC measurement, and to exploit its potential to achieve the best possible performance in...

doctoral thesis 2020

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Compact Thermal Diffusivity Sensors for On-Chip Thermal Management

Sonmez, U. (author)

Today’s systems-on-chip (SOCs) and microprocessors are complex systems that require multiple temperature sensors to monitor temperature variations in multiple spots on a single silicon die. For such thermal management applications, specialized compact and fast temperature sensors are required. This is necessary because executing an intensive...

doctoral thesis 2020

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Capacitively-Coupled Bridge Readout Circuits

Jiang, H. (author)

This Ph.D. dissertation describes the design and realization of energy efficient readout integrated circuits (ROICs), that have an input referred noise density < 5 nV/√Hz and a linearity of < 30 ppm, as required by Wheatstone bridge sensors used in precision mechatronic systems. Novel techniques were developed, at both the system-level and...

doctoral thesis 2019

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Integrated CMOS Current Sensing Systems for Coulomb Counters

Heidary Shalmany, S. (author)

Coulomb counting is a widely used method to estimate battery state-of-charge (SoC). It involves measuring and integrating the battery’s current to determine its net charge flow.

doctoral thesis 2019

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CMOS Wide-Bandwidth Magnetic Sensors for Contactless Current Measurements

Jiang, J. (author)

This Ph.D. dissertation describes the theory and realization of wide-bandwidth magnetic sensors for current measurements which breach the conventional offset and noise constraints in CMOS processes. These are achieved by several circuit-level and system-level innovations, including the use of three orthogonal ripple reduction loops (RRLs) in...

doctoral thesis 2019

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Reducing Switching Artifacts in Chopper Amplifiers

Kusuda, Y. (author)

This thesis describes the theory, design, and implementation of chopper operational amplifiers (op-amps) in CMOS integrated circuits (ICs). The chopping technique periodically corrects DC errors of such op-amps, so that low 1/f noise and stable, microvolt-level offset can be achieved. However, chopping causes switching artifacts at the amplifier...

doctoral thesis 2018

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Energy-Efficient Smart Temperature Sensors in CMOS Technology

Souri, K. (author)

doctoral thesis 2016

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Low-Power Active Electrodes for Wearable EEG Acquisition

Xu, J. (author)

doctoral thesis 2016

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Integrated Temperature Sensors based on Heat Diffusion

Van Vroonhoven, C.P.L. (author)

This thesis describes the theory, design and implementation of a new class of integrated temperature sensors, based on heat diffusion. In such sensors, temperature is sensed by measuring the time it takes for heat to diffuse through silicon. An on-chip thermal delay can be determined by geometry and the thermal diffusivity of silicon, and since...

doctoral thesis 2015

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High Speed and Wide Bandwidth Delta-Sigma ADCs

Bolatkale, M. (author)

This thesis describes the theory, design and implementation of a high-speed, high-performance continuous-time delta-sigma (CT??) ADC for applications such as medical imaging, high-definition video processing, and wireline and wireless communications. In order to achieve a GHz clocking speed, this thesis investigates excess loop delay...

doctoral thesis 2013

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MEMS Integration Techniques on Silicon-On-Insulator for Inertial Devices

Rajaraman, V. (author)

doctoral thesis 2012

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Thermal-Diffusivity-Based Frequency References in Standard CMOS

Kashmiri, S.M. (author)

In recent years, a lot of research has been devoted to the realization of accurate integrated frequency references. A thermal-diffusivity-based (TD) frequency reference provides an alternative method of on-chip frequency generation in standard CMOS technology. A frequency-locked loop locks the output frequency of an oscillator to the accurate...

doctoral thesis 2012

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Precision Instrumentation Amplifiers and a Read-Out IC for Sensor Interfacing

Wu, R. (author)

doctoral thesis 2011

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Mobility-based Time References for Wireless Sensor Networks

Sebastiano, F. (author)

Wireless Sensor Networks require small low-cost radios to enable communication among its nodes. Since those radios must be fully integrated to reduce cost and size, integration is required also for their on-board time references, which are needed to achieve synchronization with the other nodes. To deal with the lower accuracy of integrated...

doctoral thesis 2011