A Front-end ASIC with High-Voltage Transmit Switching and Receive Digitization for Forward-Looking Intra-Vascular Ultrasound

Analysis and Design of a 2.5GS/s 6-bit SAR ADC with a 3-bit/cycle Resolving Scheme

The thesis analyzes the design challenges that arise when developing high-speed ADCs and shows, through an extensive architecture study, that the SAR topology can be used with a sampling rate of 2.5GS/s if asynchronous processing and a multi-bit per cycle approach are adopted. The transistor-level implementation and simulation of a 6-bit SAR ADC...

Integrated Readout Circuit for Cross-Correlation Based Ultrasonic Ranging

Distance measurement using ultrasonic waves is employed in a wide range of industrial applications. In this thesis our main goal is to investigate the possibility of processing ultrasonic signals with a ??-modulator and to process its bitstream output signal with the cross-correlation technique, while being independent of the transducer that is...

Combined Capacitance and Temperature to Digital Converter

This thesis describes the design and measurement of an IC which can digitize both capacitance and temperature. Capacitance sensing functionality is added to an existing Temperature to Digital Converter (TDC) without adding significant die area. Two kinds of baseline capacitance compensation techniques have been investigated and their performance...

A high-resolution self-timed zero-crossing-based Incremental ?? ADC

This thesis discusses the d es ign and verification of a high-resolution self-timed incremental ?? ADC. The first self-timed incremental ?? ADC was presented by C.Chen et.al at ISSCC 2013 and this work targets to improve the resolution, linearity and energy-efficiency of a self-timed ADC. Unlike conventional ?? ADCs, a self -timed ADC is capable...

An Algorithmic Readout Approach for Thermal Conductivity Based CO2 Sensors

This thesis presents a new approach to reading out thermal-conductivity-based gas sensors. This method is intended for the readout of a CMOS compatible resistive thermal-conductivity transducer for indoor CO2 sensing applications, without requiring precision off-chip components. Instead of accurately regulating the power dissipated in the...

Capacitive Sensor Interface Using an Inverter-Based Period Modulator

This thesis discusses the basic principles, circuit implementation and measurements of an inverter-based capacitive-sensor interface based on period modulation. The interface employs an inverter-based OTA and comparator to increase the current efficiency. Moreover, it applies new circuit techniques to reduce the die size and to reduce noise. A...

An Energy-Efficient Reconfigurable Interface for Resonant Sensors Based On Ring-Down Measurement

This thesis discusses the theory, architecture design, circuit design and measurements of an ultra-low-energy reconfigurable interface circuit for resonant gas sensors. This interface circuit employs a transient measurement method. The resonant sensor is driven at a frequency close to its resonance frequency by an excitation source that is...

Een draadloze sensor voor het monitoren van bederfelijke producten: Draadloze communicatie ontwerp

In deze bachelorthesis wordt een ontwerp gepresenteerd van draadloze communicatie voor een draadloos sensorsysteem voor het automatisch meten van pH en temperatuur. Het is gelukt een volledig passieve RFID tag te selecteren en deze te integreren in een PCB ontwerp met de andere onderdelen van het sensorsysteem. Op basis van een proof of concept...

Design of Front-End Receiver Electronics for 3D Trans-Esophageal Echocardiography

The motivation behind this thesis is that cardio-vascular diseases claim the highest number of lives each year globally. In order to enhance the accuracy in diagnosis, construction of 3D images of the heart is required. From these images, precise information can be obtained regarding the 3D anatomy of the heart and its functioning. Trans...

Energy-Efficient Self-Timed Zero-Crossing-Based Incremental Delta-Sigma ADC

Design of high-resolution photodiode readout circuitry for a bio-implantable continuous glucose sensing chip

Glucose sensors are useful for monitoring and control of blood-sugar concentration for diabetic patients. There are many challenges in their wide-spread use and effectiveness in control of the disease. This work is a step towards achieving in vivo continuous long-term glucose monitoring using the optical near-infrared based glucose sensing...

Wireless Indoor Climate Sensor: Implementing the Control Unit at Ultra Low Power

With the completion of the MIST1431 multi sensor IC a demonstrator developed by the Electronic Instrumentation Laboratory of Delft University of Technology and NXP, a demonstrator that shows the capabilities of the MIST chip was needed. This thesis describes the implementation of the control unit, which has to control the MIST chip and wireless...

Energy Management System for a Wireless Indoor Climate Sensor

The Electronic Instrumentation Lab at Delft University of Technology desired to have a demonstrator for low-power temperature and humidity sensors they developed, in the form of a wireless sensor node. This thesis presents the design of the energy management system of this node. The primary design goal was to allow the sensor systems to run for...

Wireless Indoor Climate Sensor: Wireless Communication at Ultra Low Power

The required product is a wireless indoor climate sensor. It is an autonomous sensor that transmits several parameters concerning its environment wirelessly. The product will be used to demonstrate a number of energy efficient sensors. The electronic instrumentation department at Delft University of Technology developed these sensors in...

Energy-efficient readout of resonant sensors

This thesis discusses the theory, architecture and circuit design and measurements of an ultra-low-energy prototype interface circuit for a resonant gas sensor in standard 0.35-?m CMOS technology. A transient measurement method is used here. The resonant sensor is driven at a frequency close to its resonance frequency by an excitation source...

Light-Emitting Diode Junction-Temperature Sensing using Various Voltage/Current Measurement Techniques

Given the temperature dependence of various aspects of light-emitting diode (LED) performance, LED temperature sensing is becoming increasingly important in solid-state lighting applications. This thesis presents an electrical technique for junction-temperature sensing based on the measurement of the forward voltage and current of an LED at two...