International Technology Roadmap for Semiconductors 2003の要求清浄度について － シリコンウエハ表面と雰囲気環境に要求される清浄度, 分析方法の現状について －

Wave propagation and group velocity

By L I Sedov London: Cleaver-Hume Press Ltd Pp xvi + 363 Price 105s This is really two separate books within the same pair of covers First of all Chapters 1-3, some 145 pages, are devoted to the discussion of similarity and dimensional, methods and their application to a variety of problems in mechanics and fluid mechanics

http://iopscience.iop.org/article/10.1088/0031-9112/11/6/008/pdf

Similarity and Dimensional Methods in Mechanics

Vorlesungen uber theoretische Physik Von Prof. Arnold Sommerfeld. Band 1: Mechanik. Vierte, neubearbeitete Auflage. Pp. xii + 276. 18 D. marks. Band 2: Mechanik der deformierbaren Medien. Pp. xv + 376 + 4 plates. 18 D. marks. Band 3: Elektrodynamik. Pp. xvi + 368. 18 D. marks. Band 6: Partielle Differentialgleichungen der Physik. Pp. xiii + 332. 18 D. marks. (Wiesbaden: Dieterich'sche Verlagsbuchhandlung, 1947–1949.)

/pdf/lectures-on-theoretical-physics-4m0v0ffz5s.pdf

Lectures on Theoretical Physics

A new prototype triboelectric nanogenerator with superhydrophobic and self-cleaning features is invented to harvest water drop energy based on a sequential contact electrification and electrostatic induction process. Because of the easy-fabrication, cost-effectiveness, and robust properties, the developed triboelectric nanogenerator expands the potential applications to harvesting energy from household wastewater and raindrops.

Harvesting Water Drop Energy by a Sequential Contact-Electrification and Electrostatic-Induction Process

An analog behavioral model of high power gate turn-off thyristor (GTO) is developed in this paper. The fundamental methodology for the modeling of this power electronic circuit is based on the use of the realistic diode consideration of non-linear junctions. This modeling technique enables to perform different simulations taking into account the turn-on and turn-off transient behaviors in real-time. The equivalent circuits were simulated with analog software developed in our laboratory. It was shown that the tested simple and compact model allows the generation of accurate physical characteristics of power thyristors under dynamic conditions. The model understudy was validated with analog simulations based on operational amplifier devices.

/pdf/analogue-behavioral-modeling-of-gto-5e9ct9w4so.pdf

Analogue Behavioral Modeling of GTO

This paper introduces a bandpass (BP) NGD
circuit design engineering. The developed circuit is designed and implemented using distributed microstrip technology and operates with outstanding dual-band bandpass
NGD performance added with low attenuation. The BP
NGD topology presents an innovative geometrical shape
represented by an OOO (triple O) structure composed of
multi-parameter parallel transmission lines (TLs) based
elements. The OOO type NGD circuit is mainly composed
of different physical length TLs and two identical coupled
lines (CLs). Then extensive parameter NGD analyses are
elaborated to investigate on the influences of each physical
size of OOO circuit on the NGD performances. Through
the difference of physical length of transmission line, the
delay can be adjusted. Through the results of simulation
and measurement, it can be seen that the center frequency
points are about 0.75 GHz and 1.46 GHz respectively, and
the time delay is about –1.83 ns and –2.6 ns respectively.

/pdf/parametric-geometrical-study-of-ooo-microstrip-circuit-with-yuv16gvj60.pdf

Parametric Geometrical Study of OOO-Microstrip Circuit with Dual-Band Bandpass NGD Behavior

Un nouveau principe de dephaseur actif a phase constante est propose. Ce dephaseur est obtenu par l'association de dispositifs a Temps de Propagation de Groupe (TPG) positif et negatif de meme valeur absolue. Pour le concevoir, nous avons ainsi associe une ligne de transmission classique avec un circuit actif a TPG negatif developpe recemment. Apres realisation d'un prototype en technologie planaire hybride, nous avons mesure une phase constante (independante de la frequence) de -90° ± 5° sur une bande relative d'environ 75 % autour de 1,7 GHz. Les niveaux de gain et d'adaptation mesures sont egalement en tres bon accord avec les simulations. Finalement, des perspectives d'applications sont decrites

Déphaseur large bande à phase indépendante de la fréquence à base de circuit actif à temps de propagation de groupe négatif

This article introduces an innovative design of a low-pass (LP) negative group delay (NGD) integrated circuit (IC) in the 180-nm CMOS technology. The LP-NGD circuit is an inductorless topology constituted by RC-network with CMOS metal-insulator-metal (MIM) capacitor and polygate resistor. The design methodology is illustrated by considering the chip layout process. Then, the first run simulation is performed with the design rule check (DRC) and 2.5 mm ${\times }$ 2.2 mm layout versus schematic (LVS) approaches. The feasibility of the CMOS LP-NGD IC circuit implementation is validated with chip-onboard (CoB). The proof of concept (PoC) of the LP-NGD miniaturized circuit was tested in both S-parameter and time domain (TD). As expected, the calculated, simulated, and experimented results of CoB showing NGD of about −10 ns over 12 MHz and −10 dB attenuation are confirmed. The active CMOS LP-NGD technology compensates the insertion loss to 2.4 dB, the GD reaches −11 ns, and the reflection loss reaches −20 dB. Moreover, TD investigations were also performed to show the feasibility of generating pulse and arbitrary waveform signal time advance through the designed and fabricated LP-NGD CoB prototypes.

Design and Experimentation of Inductorless Low-Pass NGD Integrated Circuit in 180-nm CMOS Technology

L'objet de cet article est de presenter quelques premieres tentatives de modelisation multiphysique basees sur l'analyse tensorielle des reseaux pour realiser des etudes amonts. Nous presentons le formalisme detaille pour considerer un systeme electro-thermo-mecanique. L'objectif est de se doter d'une expression generalisee de la variete associee a un tel systeme. Dans l'approche proposee, la temperature apparait comme un parametre au meme titre que le temps, ces parametres permettent de determiner la courbure de l'espace lorsque les operateurs qui s'appliquent aux flux dependent de la temperature. Nous pouvons noter que ce comportement est tout a fait general au-dela de certaines limites en temperature. Cette affirmation montre que les espaces physiques sont toujours courbes meme dans le cadre de la mecanique classique.

https://hal.archives-ouvertes.fr/hal-01974543/document

Blaise Ravelo

Papers

Analogue Behavioral Modeling of GTO

Parametric Geometrical Study of OOO-Microstrip Circuit with Dual-Band Bandpass NGD Behavior

Déphaseur large bande à phase indépendante de la fréquence à base de circuit actif à temps de propagation de groupe négatif

Design and Experimentation of Inductorless Low-Pass NGD Integrated Circuit in 180-nm CMOS Technology

Modélisation multiphysique : premiers concepts fondamentaux dans le cadre classique