The Sensor Patch: Group Energy

The objective of the bachelor graduation project detailed in this thesis is to develop a wireless sensor patch that monitors the health of newborns. The sensor patch replaces the monitoring tasks of nurses during maternity care. The patch measures temperature, heart rate, oxygen saturation and bilirubin. Many babies are born with high bilirubin,...

Noninvasive Hemodynamic Monitoring: Left Ventricular Pressure-Volume Loop Reconstruction

Heart disease - already a leading cause of death in industrialized societies - is becoming more and more prevalent as society ages. With this increase, improvements in diagnosis and monitoring of heart disease are necessary. Current state-of-theart cardiac assessment techniques are invasive and too strenuous for heart disease patients. Therefore...

FM modulator and demodulator design: As part of a wireless FM Tranceiver

This report details the design and implementation of subsystems within a wireless FM transceiver. All the subsystems will be developed and integrated into a working FM transceiver. The subsystems discussed in this report are the modulator and demodulator. The modulator, on the transmitter side, varies the carrier wave frequency, based on the...

Design and Fabrication of a Measurement Interface for Smart IoT sensors: Hardware design

At this time, sensor developers rely on their own circuit board designs to test new sensors. This means a lot of time and money is spent on designing the custom interface for every newly designed sensor. This report describes a way to have a configurable test bench for sensors. The system consists of a data acquisition unit and multiple circuit...

Resistive Matching using an AC Boost Converter for Efficient Ultrasonic Wireless Power Transfer

Implantable Medical Devices (IMDs) could fulfill many different functions in the human body. Batteries have always been the main power source of these devices. Batteries have some drawbacks, the biggest one being the replacement of IMDs with fully discharged batteries. In this thesis a wireless power transfer system, with a receiving power...

A Wide Temperature Range Voltage Reference for Quantum Computing Applications

Quantum computers seem very promising in solving problems that are too large to be solved by classical computers that are available today. However, to generate reasonable amounts of computing power, many qubits will be required. Each of the qubits has to be individually controlled and needs to be kept at cryogenic temperatures. To allow for the...

An atto-Farad resolution closed loop impedance measurement bridge for capacitive sensors

This thesis discusses the theory, circuit design, software design and measurements of an atto-Farad resolution closed-loop impedance measurement bridge circuit for capacitive sensors implemented using commercial off the shelf components.<br/>A lock-in amplifier (LIA) method is used here. The capacitive sensor embedded in an impedance bridge is...

A Low-Power CMOS Wind Sensor

This work describes a low-power and low-cost alternative to mechanical wind sensors, suitable for volume production in standard CMOS processes. The CMOS wind sensor operates in the electro-thermal domain; therefore, it has no moving parts and therefore requires very little maintenance. Moreover, the CMOS wind sensor is an active sensor, compared...

Semi-Controllable Compression Schemes for Ultrasound Imaging

The application of Compressive Sampling (CS) in the medical ultrasound has been widely studied in recent years with the growing requirement of reconstructing high-quality images with smaller data size. Most of the current studies with successful CS reconstruction are mainly focusing on the mathematical applications of CS theory in ultrasound...

Beamforming for novel matrix arrays: Fresnel Zone Beamforming and Stolt Migration

Currently a lot of effort is put into developing matrix arrays which allow for volumetric imaging and new applications. There are however multiple problems. Compared to arrays currently in use which have in the order of 128 elements, matrix arrays can easily contain 1000 to 10000 elements. If all elements would be connected independently, the...