Pages
- 1
- 2
- document
-
He, Y. (author)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...master thesis 2014
- document
-
He, Y. (author)Multistatic ultra-wideband radar is acknowledged to be useful for human tracking in indoor surveillance. In this thesis, a global signal processing chain for detection and localization of moving human targets using a multistatic ultra-wideband radar system is proposed. The design options for the system are presented, and the required signal...doctoral thesis 2014
- document
-
Gaitas, A. (author)This dissertation aims to advance the current state of cantilevers with integrated metal thermal and deflection sensing elements. Metallic sensing elements enable the use of alternative substrate materials (such as polymers), that tend to exhibit higher compliance properties and are more robust (less brittle) compared to Si or Si3N4 cantilevers....doctoral thesis 2013
- document
-
Tan, Z. (author)This thesis describes the theory, design and realization of energy-efficient capacitive-sensor interfaces that are dedicated to energy-constrained applications. The goal of this work is to explore energy-efficient capacitive-sensor interface design techniques both at the system and the circuit level.doctoral thesis 2013
- document
-
Van der Horst, M.J. (author)The information transfer capacity of negative-feedback amplifiers, and electronic circuits in general, is limited by three fundamental limitations being noise, bandwidth, and signal power. Electromagnetic Interference (EMI) is not a fundamental limitation, but it also hampers the information transfer. EMI may have such detrimental effects that...doctoral thesis 2012
- document
-
Margallo-Balbás, E. (author), Geljon, M. (author), Pandraud, G. (author), French, P.J. (author)The scanning delay line is a key component of time-domain optical coherence tomography systems. It has evolved since its inception toward higher scan rates and simpler implementation. However, existing approaches still suffer from drawbacks in terms of size, cost, and complexity, and they are not suitable for implementation using integrated...journal article 2010
- document
-
Giraud, G. (author), Schulze, H. (author), Li, D.U. (author), Bachmann, T.T. (author), Crain, J. (author), Tyndall, D. (author), Richardson, J. (author), Walker, R. (author), Stoppa, D. (author), Charbon, E. (author), Henderson, R. (author), Arlt, J. (author)Fluorescence lifetime of dye molecules is a sensitive reporter on local microenvironment which is generally independent of fluorophores concentration and can be used as a means of discrimination between molecules with spectrally overlapping emission. It is therefore a potentially powerful multiplexed detection modality in biosensing but requires...journal article 2010
- document
-
Stefanakis, G. (author), Sourdis, I. (author), Nedeltchev, G.G. (author), De Smet, R. (author)Method and computer system for constructing a decision tree for use in address lookup of a requested address in an address space. The address space is arranged as a set of basic address ranges. Each basic address range is defined by a lower and an upper bound address, and an address in the address space is represented by a predetermined number...patent 2010
- document
-
Testa, G. (author), Huang, Y. (author), Sarro, P.M. (author), Zeni, L. (author), Bernini, R. (author)The feasibility of an integrated silicon optofluidic ring resonator is demonstrated. Liquid core antiresonant reflecting optical waveguides are used to realize a rectangular ring resonator with a multimode interference liquid core coupler between the ring and the bus waveguide. In this configuration the same waveguide used to confine the light...journal article 2010
- document
-
Margallo-Balbás, E. (author), Taroni, P. (author), Pifferi, A. (author), Koolstra, J.H. (author), Van Ruijven, 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
- document
-
Qi, L. (author)Electrical analysis techniques are introduced to determined the type of the diodes, whether they are Schottky diodes or pn junction diodes.master thesis 2010
- document
-
Li, D.U. (author), Arlt, J. (author), Richardson, J. (author), Walker, R. (author), Buts, A. (author), Stoppa, D. (author), Charbon, E. (author), Henderson, R. (author)A compact real-time fluorescence lifetime imaging microscopy (FLIM) system based on an array of low dark count 0.13?m CMOS singlephoton avalanche diodes (SPADs) is demonstrated. Fast background-insensitive fluorescence lifetime determination is achieved by use of a recently proposed algorithm called ‘Integration for Extraction Method’ (IEM) [J....journal article 2010
- document
-
Nebo, C.U. (author)In recent times, thin-film solar cells have gained a lot of attention. This can be attributed to the low material cost as well as its low energy consumption. The micromorph solar cell configuration consisting of a top amorphous silicon cell and a bottom microcrystalline silicon cell has proved to be one of the promising approaches in thin-film...master thesis 2009
- document
-
Hrauda, N. (author), Zhang, J.J. (author), Stoffel, M. (author), Stangl, J. (author), Bauer, G. (author), Rehman-Khan, A. (author), Holy, V. (author), Schmidt, O.G. (author), Jovanovic, V. (author), Nanver, L.K. (author)We report on studies of strain and composition of two-dimensionally ordered SiGe islands grown by molecular beam epitaxy using high resolution x-ray diffraction. To ensure a small size distribution of the islands, pit-patterned 4 (001) Si wafers were used as substrates. The Si wafers were patterned by optical lithography and reactive ion etching...journal article 2009
- document
- Noroozi, A. (author), Ha, L. (author), Van Dalen, P. (author), Maas, A. (author), De Raedt, S. (author), Poulakis, P. (author), Foing, B.H. (author) journal article 2009
- document
-
Grabarnik, S. (author), Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)A concept for a highly miniaturized spectrometer featuring a two-component design is presented. The first component is a planar chip that integrates an input slit and aberration-correcting diffraction grating with an image sensor and is fabricated using microelectromechanical systems (MEMS) technologies. Due to the fabrication in a simple MEMS...journal article 2008
- document
-
Grabarnik, S. (author), Emadi, A. (author), Sokolova, E. (author), Vdovin, G. (author), Wolffenbuttel, R.F. (author)An analytical model has been developed and applied to explore the limits in the design of a highly miniaturized planar optical microspectrometer based on an imaging diffraction grating. This design tool has been validated as providing the smallest possible dimensions while maintaining acceptable spectral resolution. The resulting planar...journal article 2008
- document
-
Hajenius, M. (author), Khosropanah, P. (author), Hovenier, J.N. (author), Gao, J.R. (author), Klapwijk, T.M. (author), Barbieri, S. (author), Dhillon, S. (author), Filloux, P. (author), Sirtori, C. (author), Ritchie, D.A. (author), Beere, H.E. (author)We characterize a heterodyne receiver based on a surface-plasmon waveguide quantum cascade laser (QCL) emitting at 2.84 THz as a local oscillator, and an NbN hot electron bolometer as a mixer. We find that the envelope of the far-field pattern of the QCL is diffraction-limited and superimposed onto interference fringes, which are similar to...journal article 2008
- document
-
Margallo-Balbás, E. (author), French, P.J. (author)A Monte Carlo code for the calculation of light transport in heterogeneous scattering media is presented together with its validation. Triangle meshes are used to define the interfaces between different materials, in contrast with techniques based on individual volume elements. This approach allows to address realistic problems in a flexible way...journal article 2007
- document
-
Simonov, A.N. (author), Grabarnik, S. (author), Vdovine, G.V (author)We have investigated the possibility of using transparent stretchable diffraction gratings for spectrometric applications. The gratings were fabricated by replication of a triangular-groove master into a transparent viscoelastic. The sample length, and hence the spatial period, can be reversibly changed by mechanical stretching. When used in a...journal article 2007
Pages
- 1
- 2