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Chen, Hsukang (author)
To achieve greater specificity in neurostimulation, bidirectional neural interfaces are required to verify the recorded neural response after stimulation. The specific neural interface targeted in this thesis is the epiretinal implant. Due to the heterogeneity of the retinal ganglion cells (RGCs), high-fidelity vision is only possible when all...
master thesis 2024
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Huang, Shijie (author)
Class D amplifiers find widespread application in audio devices for driving load speakers, primarily due to their remarkable efficiency. Nonetheless, this enhanced efficiency often comes at the expense of reduced linearity. Hence, techniques for reducing Total Harmonic Distortion (THD) are important in the context of class D amplifiers.<br/><br/...
master thesis 2023
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Muller, Marjolein (author)
Introduction: Over the past two decades deep brain stimulation (DBS) has emerged as an important therapeutic option for Parkinson’s disease (PD). However, the current DBS programming method, monopolar review (MPR), is time-consuming, requires highly trained personnel and causes discomfort for patients. This study aimed to predict the optimal...
master thesis 2023
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Pfaiffer, Filippo (author)
Engineered Heart Tissues (EHTs) are a valuable approach enabled by Organ-on-Chip (OoC) technology to model human cardiac tissue. These small microfluidic devices allow the culture and development of living cardiac cells in 3D structures, to reproduce tissue dynamics and functionality in-vitro, thus fostering the development of new and more...
master thesis 2022
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Weustink, Cyril (author)
Currently, EEG recordings are mostly made using scalp recording devices. These devices are typically difficult to put on and bulky, limiting their use to a lab environment. In-ear EEG recording is proposed as a more practical alternative to scalp EEG recording. <br/><br/>In-ear EEG replaces the scalp electrode array with more discrete earpieces,...
master thesis 2022
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HUA, YUAN (author)
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...
master thesis 2022
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Kragt, Wouter (author)
To be able to cope with the demands of next generation radar applications, a bandwidth of 400MHz is required. The SAR assisted CT ∆Σ ADC provides an energy efficient ADC, but needs improvements to cope with the bandwidth enlargement. This thesis examines the front end components and thus initially focuses on resolving the issues in the front end...
master thesis 2022
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Koers, Pallas (author)
Adaptive Deep Brain Stimulation (aDBS) offers the potential for personalized stimulation strategies for patients with Parkinson's Disease (PD). The closed loop characteristic of this system requires the incorporation of PD relevant biomarkers that determine the patient's need. In order to obtain high quality LFP (Local Field Potential) input...
master thesis 2022
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Krishnaswamy, Medha (author)
Optogenetics is a neuromodulation technique that uses light to control genetically modified cells to express light sensitive ion channels. Optogenetics allows stimulation of only the specific cells in the region that have been genetically modified and thus results in a high resolution of stimulation.<br/>Currently optogenetic implants are used...
master thesis 2021
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Koele, Berend (author)
Vagus nerve stimulation (VNS) has been proven to be an effective treatment for patients suffering from drug­-resistant epilepsy. Current vagus nerve stimulators are either implantable devices or bulky, handheld devices. The implant consists of a pulse generator beneath the skin of the chest, connected to electrodes that are wired to the cervical...
master thesis 2021
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Li, Haoyuan (author)
This thesis discusses the basic architecture, design details, circuit implementation, and measurements of a digital class D current driver.<br/>The driver contains two main parts: a digital control loop and analog circuits.<br/>Parts of the important part in the digital control loop contain noise shaper, plant compensator, and cable capacitance...
master thesis 2021
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del Rivero Cortázar, Aitor (author)
The need to understand how the brain works has sparked interest in electrode arrays to record neural signals. Intracellular recordings with nanoelectrodes that penetrate the cell allow better signal quality and additional functions such as voltage clamping to set the neuron's transmembrane voltage. The voltage clamp aims to facilitate the...
master thesis 2021
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Nanhekhan, Brian (author)
Patients that suffer from heart failure can benefit from wearable monitoring devices that continuouslymonitor the condition of the heart. One of the foremost symptoms of exacerbation of the heart is fluidcongestion in the lungs. One of the method to measure a change in biological tissue, such as thebuild­up of fluids in the lungs and chest, is...
master thesis 2021
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Hahn, Georg (author)
Medical Body Area Networks (MBANs) are a cluster of possibly heterogeneous devices, communicating with each other in, on or around the human body. Through these devices, medical data is collected, processed in some way and transferred outside of the network. The IEEE 802.15.6 standard aims to govern communications between such devices. It...
master thesis 2021
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van der Meer, Fedde (author), Pennings, Saul (author)
Epilepsy is a medical condition which is caused by excessive or synchronous neuronal activity of the brain cells. These activities can lead to attacks where the patient can lose conciseness or experiences random muscle cramps at seemingly any point in time. Using implantable on body sensors these seizure attacks could be detected and even...
bachelor thesis 2021
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Diakou, Androniki (author)
The overarching goal of Engineered Heart Tissues (EHTs) is to develop functional 3D heart tissues in vitro with the potential to find drug targets, identify drug toxicity and predict the effects of the drugs in the body. This 3D model of the cardiac tissue consists of a bunch of cells, self-assembled around specific anchoring points the main aim...
master thesis 2020
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Baladari, Nikhita (author)
The functioning of the brain depends on the interplay between a large number of neurons. To understand the information processing in neuronal networks, we need tools to record the electrical activity of cells at high resolution. Microelectrode arrays (MEAs) are predominantly used to measure neuronal activity<br/>at high spatial and temporal...
master thesis 2020
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van der Lingen, Elke (author)
Due to the earth’s population growth and the increased living age of a person, more and more people could deal with medical problems. Early detection of health related problems in both healthy and people with medical problems, will catch problems early and prevent the need for more costly procedures. One of these medical problems is concerning...
master thesis 2020
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Eveleens, Richard (author), Gottmer, Leila (author), Haarman, Mart (author)
This thesis report focuses on possible methods of digital implementation of motional feedback in a bass loudspeaker. In this thesis, the control system will be created for a monopole and a dipole speaker specifically. It does so by sketching the outlines of such a system and examining possible designs for the components required to suppress...
bachelor thesis 2020
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Joosse, Corniël (author)
Absence seizures have a real-life impact on epileptic subjects, as day-to-day tasks can by suddenly interrupted making for dangerous situations. Though a lot of work has been done on seizure detection, to limit the impact on epileptic patients, the true necessity lies in timely prediction of seizures before they manifest. Various attempts have...
master thesis 2020
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