M. Abd Elnaby, I. Elshafiey, S. Khamees, S.S. Serag-Eldeen
{"title":"Finite element computational modeling of magneto-optic imaging","authors":"M. Abd Elnaby, I. Elshafiey, S. Khamees, S.S. Serag-Eldeen","doi":"10.1109/ICM-02.2002.1161501","DOIUrl":"https://doi.org/10.1109/ICM-02.2002.1161501","url":null,"abstract":"Magneto-optic imaging (MOI) implements a magneto-optic sensor to produce an image of magnetic flux leakage from surface and subsurface defects in ferromagnetic and non-ferromagnetic metals. The techniques have gained widespread interest in the aviation industry for detecting cracks and corrosion beneath paint and other surface coatings. This paper presents finite element (FE) modeling of magneto-optic imaging. Transient finite element implementation techniques are presented for a typical aircraft inspection configuration. The implementation is done for different materials, and results revealed a noticeable change in the vertical component of the magnetic field. FE presents a powerful tool for enhancing use of MOI technique.","PeriodicalId":433175,"journal":{"name":"The 14th International Conference on Microelectronics,","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124680225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Abdelaoui, M. Lamine, M. Idrissi-Benzohra, M. Benzohra, M. Ketata, F. Olivié
{"title":"Response of electrically active defects in P/sup +/N junctions when applying a magnetic field","authors":"M. Abdelaoui, M. Lamine, M. Idrissi-Benzohra, M. Benzohra, M. Ketata, F. Olivié","doi":"10.1109/ICM-02.2002.1161502","DOIUrl":"https://doi.org/10.1109/ICM-02.2002.1161502","url":null,"abstract":"Ge preamorphization step is used to reduce the high diffusivity of boron implanted in silicon, in order to obtain ultra-shallow P/sup +/N junctions required for Ultra Large Scale Integration (ULSI) technology. A drawback of such a method is that it could introduce electrical active defaults in the structure. An original method to detect the presence of these defects is presented. It is based on the application of a magnetic field to the structure and then the measurement of its current-voltage (I-V) characteristic variations. Three samples, prepared under different conditions (an ambient preamorphized diode, a nitrogen preamorphized diode and a crystalline diode as a reference), were studied. The measurements were performed under a magnetic field of 800 G in the temperature range 160 K to 280 K. The results show that the relative variation of the reverse current does not exceed 10% for the reference and the ambient preamorphized diodes, whereas it is strongly dependent on the sample temperature for the third diode. For this sample, a peak of current was observed around 240 K, independently of the applied bias voltage. These results are in good agreement with the DLTS spectra obtained for such structure.","PeriodicalId":433175,"journal":{"name":"The 14th International Conference on Microelectronics,","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125889214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Hammi, S. Boumaiza, M. Jaidane-Saidane, F. Ghannouchi
{"title":"Adaptive baseband digital predistorter suitable for wideband signals","authors":"O. Hammi, S. Boumaiza, M. Jaidane-Saidane, F. Ghannouchi","doi":"10.1109/ICM-02.2002.1161513","DOIUrl":"https://doi.org/10.1109/ICM-02.2002.1161513","url":null,"abstract":"In this paper, we present a new topology for an adaptive baseband digital predistorter suitable for wideband signals. The proposed predistorter is composed of a cascade of a fixed LUT based predistorter and an adaptive linear subband filter's bank. The linear subband filters serve to compensate for the dependency of the RF power amplifier behavior on the temperature. In this work, measured AM/AM and AM/PM characteristics of an LDMOS class A/B amplifier were used for the predistorter performances evaluation purposes. The simulation results using a CDMA2000 signal show a good performance in terms of the out of band emission reduction of the amplifier output spectrum.","PeriodicalId":433175,"journal":{"name":"The 14th International Conference on Microelectronics,","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121596283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}