Tree Reconstruction from a Point Cloud using an L-system

Storing accurate models of complex geometries in a compact way has become an increasingly challenging issue, especially when dealing with large datasets. One of such datasets is Cobra-Groeninzicht's database of all trees in the Netherlands. In the gaming industry, a new technique is being used to generate tree models: the L-system. An L-system...

Distribution of the electricitygrid of a tiny house community: Powerline communication

This thesis will discuss the design, simulations and measurements of a powerline communication system that utilizes FSK modulation in order to transfer information from a transmitter to a receiver at a baud rate of 1kbps, in order to reach the requirement of having an effective data rate of at least 6bps. This system is designed specifically to...

Automated Semantic Segmentation of Aerial Imagery using Synthetic Data

Semantic segmentation of aerial images is the ability to assign labels to all pixels of an image. It proves to be essential for various applications such as urban planning, agriculture and real-estate analysis. Deep Learning techniques have shown satisfactory results in performing semantic segmentation tasks. Training a deep learning model is an...

A Dynamically Reconfigurable Recursive Switched-Capacitor DC-DC Converter with Adaptive Load Ability Enhancement

Multiple voltage conversion ratio (VCR) recursive switched-capacitor (SC) DC-DC<br/>converters, based on a number of basic 2:1 converters, are widely used for on-chip power supplies due to their flexible VCRs for higher energy efficiency. However, conventional multi-VCR SC converters usually have one or more 2:1 converters unused for some VCRs,...

A 10-mV-Startup-Voltage Thermoelectric Energy Harvesting System Based on a Piezoelectric Cold Starter

Traditional power batteries have been unable to meet the requirements of wireless sensor network (WSN) applications which require battery lifetime and no battery replacement. So, harvesting ambient energy and converting it into electrical energy to power wireless sensors has become an alternative to the traditional power sources. Harvesting...

High efficiency, highly integrated DC-DC converter for 48V data centers with standard CMOS and GaN devices

This thesis presents a 48V-to-1V 10-level dual inductor hybrid converter (DIHC) containing 11 on-chip switches and an off-chip Gallium Nitride (GaN) switch. Thanks to the 10-level Dickson switched-capacitor (SC) circuit, most of the voltage stress will be taken over by off-chip capacitors, which reduces the voltage stress of each switch to 4.8 V...

Compact and Scalable Capacitorless Linear Voltage Regulator for Power Management Integrated Circuits

The current generation of power management integrated circuits require fully integrated, low cost and low power solutions for voltage regulation. As final blocks in the internal power supply chain, excellent performance linear voltage regulators are required, especially in terms of dynamic response and stability. Since many voltage regulators...

The Sensor Roller: A Piezoelectric Energy Harvesting Roller in a Bearing for Self-Sustained IoT Sensors

With the high-speed development of the Internet of Things (IoT), powering such a massive number of wireless IoT sensors with chemical batteries become more and more unpractical. To make the IoT sensors self-sustained, Piezoelectric Energy Harvesting (PEH) technology provides an excellent solution to power the devices with a relatively long...

A 3-Mode Wide Operational Range Reconfigurable Regulating Rectifier for Wireless Power Transfer

This article presents a novel wide operational range reconfigurable regulating rectifier for wireless power transfer. The proposed 1X/2X/3X rectifier achieves wide range voltage regulation without global loop control to minimize the area occupation. Compared with previous work, more working modes and greater magnification allow the proposed...

A Hybrid Step-Up DC-DC Converter and A VCSEL Diode Driver

In today's highly information-based society, portable smart devices are helping everyone all the time. At the same time, many of them need corresponding power management modules to provide them with stable power from the Li-ion battery. Since different functional modules require different voltage levels, a special DC-DC converter or driver must...

Time-to-Digital Converter for Low-Power Direct Time-of-Flight System

Depth sensing technology has developed rapidly recently due to its broad applications. Time-of-Flight (ToF) is a popular technology in depth sensing because of its advantages in high measuring accuracy and low complexity in image processing. ToF technologies are divided into two kinds: indirect time-of-flight (iToF) and direct Time-of-Flight ...

Low Power Bluetooth Baseband with a RISC-V Core for Autonomous Sensors using Chisel

The number of IoT devices and their applications is projected to continue increasing in the future, creating a demand for low-power wireless communications that allow IoT devices to either be connected directly to the internet or to use other devices as a back gate to it. BLE is already one of the most used wireless communication protocols for...

A 70-V integrated SSHC rectifier for triboelectric energy harvesting with duty-cycle-based MPPT

A triboelectric nanogenerator (TENG) is a new transducer utilizing contact electrification and electrostatic induction to transduce mechanical energy into electric energy. Due to its high energy density and flexibility, it can be employed to make electronic devices self-powered by ambient mechanical energy in many application scenarios, such as...

A High-Efficiency 4-Phase Series-Parallel Resonant Switched-Capacitor 48-to-3 V DC-DC Converter

Resonant switch-capacitor (ReSC) is a type of hybrid switched-capacitor (HSC) which utilizes both inductor and capacitor, bearing the potential to overpower conventional switched-capacitor (SC) and magnetic-based converters. This work introduces a novel four-phase series-parallel resonant switch-capacitor (ReSC) DC-DC converter topology, which...

Negator-based Switch Capacitor Buck-boost DC-DC Converter

The development of the Internet of Things has given rise to enormous new industries and applications, including automobiles, smart healthcare systems, smart houses, etc, and the power supply has become the major constraint preventing them from further increasing logic speed. Thus, a SC(switch-capacitance) DC-DC converter with high efficiency,...

A High-Efficiency 2-Switch Bipolar Boost Converter with PV-assisted Startup Voltage for the Bipolar Thermoelectric Energy Harvesting

With the great application potential of the Internet of Things (IoT), a reliable power supply solution for IoT plays an important role during the development of IoT and other advanced applications. Among all the options including the electricity grid, batteries, and energy harvesting systems, the energy harvesting systems are considered with...

A 10-bit Digital to Time Converter with a Phase Noise Filter

The growing demand for asynchronous data communication leads to a growing demand for CDR systems to recover the sampling clock of the received data. The DTC in the CDR system is the main jitter source of the recovered data. A low-jitter DTC is required to generate data of low-jitter performance, calling for the application of a phase noise...

A Hybrid-Hysteresis-CFM Control Method Recursive Switched-Capacitor DC-DC Converter with ripple reduction and load transition enhancement

Switched-capacitor power converters (SCPCs) have emerged as promising alternatives to traditional inductive power converters due to their CMOS integration capability and configurable conversion ratios. However, challenges such as output ripple, power efficiency, and transient response have hindered their widespread adoption. This article...