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A Highly-Scalable Thermal-Diffusivity-Based Temperature Sensor

Angevare, J.A. (author)

A highly digital temperature sensor, based on the thermal diffusivity of silicon, for thermal management applications has been reported. Recently, Thermal-Diffusivity based temperature sensors have undergone a radical change from an analog-based readout architecture to a more digital VCO-based one. However the more digital approach led to...

master thesis 2015

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High-Performance Operational and Instrumentation Amplifiers

Shahi, B. (author)

This thesis describes techniques to reduce the offset error in precision instrumentation and operational amplifiers. The offset error which is considered a major error source associated with gain blocks, together with other errors are reviewed. Conventional and newer approaches to remove offset and low frequency noise are discussed, with a focus...

doctoral thesis 2015

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GonioTrainer for sport

Schilken, I. (author), Miedema, R.D. (author)

De GonioTrainer is een systeem dat mensen helpt om een beter inzicht te krijgen in hun bewegingen. Het bestaat uit een sensor module en een feedback module die beide op het lichaam worden bevestigd. Ze worden draadloos uitgelezen en aangestuurd door een smartphone. Er is gekozen voor een Bluetooth Low Energy verbinding tussen de modules en en...

bachelor thesis 2015

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Bachelor Afstudeerproject BabyShell: RTC, alarm en thermometer

Hogenhout, G. (author), Hogenhout, K. (author)

Deze thesis is geschreven in het kader van het bachelor eindproject van de TU Delft in samenwerking met het bedrijf IT Motions. De opdracht van dit bedrijf was een prototype te ontwikkelen van Babyshell. BabyShell is een apparaat dat moeders uit derdewereldlanden advies geeft tijdens de zwangerschap en verder helpt met het (op)voeden van hun...

bachelor thesis 2015

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In-vitro waveguide system for the detection of Escherichia coli in drain fluid after colorectal anastomotic leakage

Van 't Hof, S.A. (author)

Colorectal anastomotic leakage is one of the most feared complications after colorectal surgery and is associated with increased morbidity, prolonged hospital stay and risk of local cancer reoccurrence. One out of ten anastomoses leak, leading to infections. Colorectal anastomotic leakage is currently diagnosed by sniffing and watching drain...

master thesis 2014

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A Low-Power Thermal Wind Sensor in CMOS Technology

Wu, J. (author)

Wind sensors are widely used in many critical applications, such as navigation, weather forecast, aerospace and wind energy assessment. The thermal wind sensor can measure wind speed and direction at the same time, by measuring the temperature gradient on the sensor’s surface which is induced by the wind flow. Compared to traditional mechanical...

master thesis 2013

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

Markenhof, J. (author), Van der Meulen, J. (author), De Vries, C. (author)

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...

bachelor thesis 2013

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

Kamath, U.R. (author)

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...

master thesis 2012

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The impact of morphology on light transport in cancellous bone

Margallo-Balbás, E. (author), Taroni, D. (author), Pifferi, A. (author), Koolstra, J.H. (author), Van Ruyven, L.J. (author), French, P.J. (author)

In recent years, optical techniques based on diffusion approximation have demonstrated their ability to gain rich spectral information about bone. However, these methods normally assume homogeneity, while cancellous bone and marrow form a highly heterogeneous two-phase medium. This paper studies the limitations of this assumption, and quantifies...

journal article 2010

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Optical techniques for the study of living tissue

Margallo Balbás, E. (author)

The potential of light in diagnosis and therapy has been long recognised. With the advent of scientific progress in our understanding of light propagation and interaction with tissue and parallel major technological advances in how optical energy can be generated, detected and processed, this potential is being realised. Linking with this trend,...

doctoral thesis 2010

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Micromachined lamps for tissue spectroscopy

Amor Rio, J. (author)

An implant designed to treat glioblastoma multiforme, GBM, in the brain which makes use of metronomic Photodynamic Therapy (mPDT) is being developed. A device to do spectrography is needed in this implant to monitor the evolution of the treatment. Therefore, the aim of this research is to study the viability of a micromachined lamp to do...

master thesis 2009

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A CMOS Image Sensor With In-Pixel Buried-Channel Source Follower and Optimized Row Selector

Chen, Y. (author), Wang, X. (author), Mierop, A.J. (author), Theuwissen, A.J.P. (author)

This paper presents a CMOS imager sensor with pinned-photodiode 4T active pixels which use in-pixel buried-channel source followers (SFs) and optimized row selectors. The test sensor has been fabricated in a 0.18-mum CMOS process. The sensor characterization was carried out successfully, and the results show that, compared with a regular imager...

journal article 2009

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An integrated interface circuit with a capacitance-to-voltage converter as front-end for grounded capacitive sensors

Heidary, A. (author), Meijer, G.C.M. (author)

This paper presents the analysis and design of an integrated interface for grounded capacitive sensors. To reduce the effects of parasitic cable capacitances, a feedforward technique has been applied. In combination with the use of a special front-end amplifier this yields high immunity for a parasitic cable capacitance. The major nonidealities...

journal article 2009

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Interface Electronics for a CMOS Electrothermal Frequency-Locked-Loop

Zhang, C. (author), Makinwa, K.A.A. (author)

journal article 2008

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Concave diffraction gratings fabricated with planar lithography

Grabarnik, S. (author), Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)

This paper reports on the development and validation of a new technology for the fabrication of variable line-spacing non-planar diffraction gratings to be used in compact spectrometers. The technique is based on the standard lithographic process commonly used for pattern transfer onto a flat substrate. The essence of the technology presented...

conference paper 2008

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IC-compatible microspectrometer using a planar imaging diffraction grating.

Grabarnik, S. (author), Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Vdovin, G. (author), Wolffenbutter, R.F. (author)

The design and performance of a highly miniaturized spectrometer fabricated using MEMS technologies are reported in this paper. Operation is based on an imaging diffraction grating. Minimizing fabrication complexity and assembly of the micromachined optical and electronic parts of the microspectrometer implies a planar design. It consists of two...

conference paper 2008

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Thermo-optical delay line for optical coherence tomography

Margallo-Balbas, E. (author), Pandraud, G. (author), French, P.J. (author)

Optical Coherence Tomography (OCT) is a powerful medical imaging technology. Its ability to non-invasively probe tissues in depth with high resolution has lead to applications in many fields of medicine, with a large potential for surgical guidance. One of the technological challenges impairing faster adoption of OCT is the relative complexity...

conference paper 2007

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Some properties of a room temperature THz detection array

Kasalynas, I. (author), Adam, A.J.L. (author), Klaassen, T.O. (author), Hovenier, N.J. (author), Panraud, G. (author), Iordanov, V.P. (author), Sarro, P.M. (author)

Detection peculiarities of an un-cooled (room temperature) 8×8 pixel array designed to image broadband THz radiation were investigated. Each pixel consists of a thin conductive film absorber on a dielectric membrane with thermopile temperature readout. It was designed and tested for four combinations of two different types of absorber and...

conference paper 2007

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Piezoelectric deformable mirror with adaptive multiplexing control

Simonov, A.N. (author), Hong, S., (author), Vdovin, G. (author)

journal article 2006

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Pentacene organic thin film transistors with anodized gate dielectric

Goettling, S. (author), Brill, J. (author), Fruehauf, N. (author), Pflaum, J. (author), Margallo-Balbás, E. (author)

A low temperature high quality gate dielectric process for bottom gate organic thin film transistors (OTFT) is introduced which is compatible to plastic substrates. The Al2O3 dielectric is grown from the aluminum gate electrode by anodic oxidation at room temperature and exhibits an exceptionally good electrical performance even for thin layers...

conference paper 2005