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,...

Low-power low-cost readout electronics for inductive vital-sign measurements

Energy Efficient Feature Extraction for Single-Lead ECG Classification Based On Spiking Neural Networks

Cardiovascular diseases are the leading cause of death in the devel- oped world. Preventing these deaths, require long term monitoring and manual inspection of ECG signals, which is a very time consum- ing process. Consequently, a wearable system that can automatically categorize beats is essential.<br/>Neuromorphic machines have been introduced...

Bachelor Afstudeer Project BabyShell: Voeding, Batterijmanagement en PCB

Voor het Bachelor Afstudeer Project van groep I is BabyShell ontwikkeld. BabyShell is een draagbaar apparaat dat in staat is om jonge ouders en zwangere vrouwen te helpen om een voorlopige diagnose te stellen van medische problemen van hun kinderen. Ook is BabyShell in staat om temperatuur op te nemen en belangrijke data bij te houden zoals...

Microcontroller, display, opslag, user interface en medische functionaliteit: Bachelor Afstudeer Project BabyShell

In ontwikkelingslanden zijn er nog altijd veel problemen met de gezondheid van zwangere vrouwen en jonge kinderen. Daarom is voor dit Bachelor afstudeerproject BabyShell ontwikkeld: een draagbaar apparaat dat onafhankelijk is van het stroomnet en door middel van een vraag-antwoord proces diagnoses voor medische problemen kan stellen. BabyShell...

A Low Power System-on-Chip with Memory Stacked on Top of Logic

This work introduces a low-power Cortex-M0+ based computing platform for battery-powered, embedded applications. Voltage stacking is used to save power by recycling charge through a power domain between 0V and Vdd, and a power domain stacked on top of it between Vdd and 2Vdd. The technique enables connecting chips of the future directly to the...

Energy Saving in Bluetooth 4.0 Wireless Locks Connected via Mobile Phone to the Internet

In a modern environment users are more dependant on their ability to use their mobile phone for nearly everything. They communicate with almost any device and those devices provide nearly limitless access to for instance a watch or in new applications, a lock. Issues encountered with these devices are the almost always lack the ability to keep...

A Capacitance-Based Reference Scheme for a 14b-Linear, 100 MS/s SAR-Assisted Pipeline ADC

Voltage reference buffers have always been the most power-hungry blocks in switched-capacitor SAR ADCs. High frequency dynamic loading of the buffer by the capacitive DAC causes glitches on the reference voltage, and the buffer has to be fast enough to recover such transients to 1/2 LSB precision in every bit cycle. Such stringent requirements...

A Low Power 10-bit SAR ADC in a 45nm CMOS process

In this work a low power SAR ADC with 8.9 ENOB for wireless communication systems is presented. A capacitive charge redistribution DAC with a unit capacitor of 0.5fF is used. The implemented charge-sharing technique, allows the use of 2^(N-1) + 1 unit capacitors, instead of the conventional 2^N , thus decreasing the DAC area and the DAC...

Transmitter measurements and analysis of frame synchronization of an Impulse Radio Ultra-wideband system

Ultra-wideband (UWB) is a promising radio technology which is well suited to low power short-range wireless applications. At Holst Centre/imec, there is a research program on the design and implementation of ultra low power, Impulse Radio-UWB (IR-UWB) wireless systems suitable for audio streaming and real time localization systems. Some key...

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...

Interference cancellation techniques for low power wireless sensors

Non-coherent on-off keying (OOK) receivers are preferred in ultra low power (ULP) wireless devices as they consume less power when compared to receivers based on other modulation schemes. However, these devices are highly susceptible to co-channel interference (CCI). Therefore, interference cancellation (IC) techniques for ULP non-coherent OOK...

Design of a fully integrated CMOS highly temperature stable frequency reference

A new fully integrated frequency reference has been designed, fabricated and measured. The goal of the design procedure has been high stability of the frequency over temperature variations. This should be achieved using a CMOS technology without MEMS and crystals, while being restricted by a very low power budget. The frequency is designed based...

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...

Low Power Evaluation for Arbitration and MPSoC

This thesis presents a power analysis for various arbitration schemes. We chose variations on the round-robin and time-division multiplexing schemes as our arbiter configurations. The arbiters were implemented with 90 nm low-power standard cell libraries from TSMC, and gate-level power extraction was performed. Clock-gating was optionally...

Bit-error rate measurement setup and comparator design

Bit-error rate (BER) of comparators is becoming one of the limiting factors in the design of high speed ADCs. BER measurement setup is introduced and implemented in this thesis. Using this BER measurement setup gives us the opportunity to compare the BER of different comparators. It also enables us to study the effect of different parameters...