Searched for: department%3A%22Microelectronics%255C%252B%2526%255C%252BComputer%255C%252BEngineering%22
(1 - 20 of 60)
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Leus, G. (author), Van Walree, P.A. (author)A multiband OFDM transmitter and receiver are presented for underwater communications at low SNR. Compared with a single-band OFDMscheme, the multiband approach leads to a considerable reduction in the receiver complexity. The proposed system has been tested at sea with 16 subbands covering a total bandwidth of 3.6 kHz, at user data rates of 4.2...journal article
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Vorobyov, A.V. (author), Bagga, S. (author), Yarovoy, A.G. (author), Haddad, S.A.P. (author), Serdijn, W.A. (author), Long, J.R. (author), Irahhauten, Z. (author), Ligthart, L.P. (author)For impulse radio ultrawideband communications an “antenna plus generator” system is co-designed and an on chip generator is integrated into the antenna. This approach does away with the need for intermediate transmission lines conventionally placed between an RF device/generator and an antenna and therefore eliminates the need for a balun,...journal article
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Yan, F. (author), Migliorato, P. (author), Hong, Y. (author), Rana, V. (author), Ishihara, R. (author), Hiroshima, Y. (author), Abe, D. (author), Inoue, S. (author), Shimoda, T. (author)The transient drain current of the single-grain silicon thin-film transistor with gate oxide deposited by electron cyclotron resonance plasma-enhanced chemical vapor deposition has been measured by applying a square signal on the gate and a constant low voltage between source and drain. Switch-on undershoot current has been observed, which can...journal article 2005
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Ho, Y.C. (author), Staszewski, R.B. (author), Muhammad, K. (author), Hung, C.M. (author), Leipold, D. (author), Maggio, K. (author)RF circuits for multi-GHz frequencies have recently migrated to low-cost digital deep-submicron CMOS processes. Unfortunately, this process environment, which is optimized only for digital logic and SRAM memory, is extremely unfriendly for conventional analog and RF designs. We present fundamental techniques recently developed that transform the...journal article 2006
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- Haddad, S.A.P. (author), Houben, R.P.M. (author), Serdijin, W.A. (author) journal article 2006
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- Rocha, L.A. (author), Cretu, E. (author), Wolffenbuttel, R.F. (author) journal article 2006
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Yan, F. (author), Migliorato, P. (author), Ishihara, R. (author)The transient properties of single grain–thin film transistors (SG-TFTs) with high electron mobility have been studied. Overshoot current induced by trap states has been observed in most of the devices. A method of ac measurements has been used to investigate the trap processes. Both transient and ac measurements show that the response of some...journal article 2006
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Yuan, C.A. (author), Zhang, G.Q. (author), Han, C.N. (author), Chiang, K.N. (author), Cui, Y. (author)The mechanical characteristics of the long-chain double-stranded DNA (dsDNA) molecule under the axial stretching and lateral unzipping are studied by the clustered atomistic-continuum method (CACM). The CACM consisted of the clustered atom method (CAM) and the atomistic-continuum method (ACM). The CAM treats the specific atomic group as the...journal article 2007
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Sourdis, I. (author), Pnevmatikatos, D.N. (author), Vassiliadis, S. (author)In this paper, we consider hardware-based scanning and analyzing packets payload in order to detect hazardous contents.We present two pattern matching techniques to compare incoming packets against intrusion detection search patterns. The first approach, decoded partial CAM (DpCAM), predecodes incoming characters, aligns the decoded data, and...journal article 2007
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Yan, B. (author), Pham, H.T.M. (author), Ma, Y. (author), Zhuang, Y. (author), Sarro, P.M. (author)The authors demonstrate a method for the fabrication of in situ ultrathin porous anodic aluminum oxide layers (aspect ratio<2:1) on Si, which can be directly used as templates for nanodot preparation and for pattern transfer. The regular shape of the aluminum oxide pores is maintained even when the thickness of the aluminum oxide template is...journal article 2007
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Khalili Amiri, P.K. (author), Rejaei, B. (author), Vroubel, M. (author), Zhuang, Y. (author)The authors report on the observation of nonreciprocal spin wave propagation in a thin ( ? 200?nm) patterned Ni–Fe stripe. The spin wave transmission spectrum is measured using a pair of microstrip lines as antennas. The nonreciprocity of surface wave dispersion brought about by an adjacent aluminum ground leads to a nonreciprocal coupling of...journal article 2007
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Yan, F. (author), Migliorato, P. (author), Ishihara, R. (author)The influence of twin boundaries on the characteristics of single grain-silicon thin film transistors has been analyzed by three-dimensional simulation. The simulations show that the orientation and the location of a twin boundary could affect the field-effect mobility and the leakage current of a device. The field-effect mobility increases with...journal article 2007
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Chu Duc, T. (author), Lau, G.K. (author), Sarro, P.M. (author)The authors report on the analysis of the polymer constraint effect and its use for a micromachined electrothermal bimorph actuator. The actuated displacement is enhanced due to the polymer constraint effect. Both the thermal expansion and apparent Young’s modulus of the constrained polymer blocks are significantly improved, compared with the no...journal article 2007
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Zhang, J.J. (author), Stoffel, M. (author), Rastelli, A. (author), Schmidt, O.G. (author), Jovanovi?, V. (author), Nanver, L.K. (author), Bauer, G. (author)The morphological evolution of both pits and SiGe islands on patterned Si(001) substrates is investigated. With increasing Si buffer layer thickness the patterned holes transform into multifaceted pits before evolving into inverted truncated pyramids. SiGe island formation and evolution are studied by systematically varying the Ge coverage and...journal article 2007
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Shahbahrami, A. (author), Juurlink, B. (author), Vassiliadis, S. (author)The 2-D Discrete Wavelet Transform (DWT) consumes up to 68% of the JPEG2000 encoding time. In this paper, we develop efficient implementations of this important kernel on general-purpose processors (GPPs), in particular the Pentium 4 (P4). Efficient implementations of the 2-D DWT on the P4 must address three issues. First, the P4 suffers from a...journal article 2008
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Tang, Z. (author), Leus, G. (author)In this paper, we present a single-carrier transceiver for rapidly time-varying channels, where the equalization step is implemented in the frequency domain. When the channel abides with both fast fading and severe inter-block interference, our equalizer relies on a band approximation of the frequencydomain channel matrix to maintain low...journal article 2008
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Yuan, C.A. (author), Van der Sluis, O. (author), Zhang, G.Q. (author), Ernst, L.J. (author), Van Driel, W.D. (author), Flower, A.E. (author), Van Silfhout, B.R. (author)We propose an amorphous/porous molecular connection network generation algorithm for simulating the material stiffness of a low-k material (SiOC:H). Based on a given concentration of the basic building blocks, this algorithm will generate an approximate and large amorphous network. The molecular topology is obtained by distributing these blocks...journal article 2008
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Mheen, B. (author), Song, Y.J. (author), Theuwissen, J.P. (author)This letter presents an electrical method to reduce dark current as well as increase well capacity of four-transistor pixels in a CMOS image sensor, utilizing a small negative offset voltage to the gate of the transfer (TX) transistor particularly only when the TX transistor is off. As a result, using a commercial pixel in a 0.18 ?m CMOS process...journal article 2008
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Henneken, V.A. (author), Sassen, W.P. (author), Van der Vlist, W. (author), Wien, W.H.A. (author), Tichem, M. (author), Sarro, P.M. (author)In this paper, we present a microelectromechanical systems-based two-degrees-of-freedom positioning device combined with a clamping structure for positioning and constraining an optical fiber. The fiber position can be controlled in the two directions perpendicular to the fiber axis using two specifically designed wedges that can be accurately...journal article 2008
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Al-Ars, Z. (author), Hamdioui, S. (author), Gaydadjiev, G. (author), Vassiliadis, S. (author)Up to 53% of the time spent on testing current Intel microprocessors is needed to test on-chip caches, due to the high complexity of memory tests and to the large amount of transistors dedicated to such memories. This paper discusses the methodology used to develop effective and efficient cache tests, and the way it is implemented to optimize...journal article 2008
Searched for: department%3A%22Microelectronics%255C%252B%2526%255C%252BComputer%255C%252BEngineering%22
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