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As microelectronics evolves smaller into the nanometric scale, external interferences starts to be harmful to the system expected behavior. As classical systems do not handle adequately faults caused by such sources, new topologies are proposed. Our present work proposes a solution for this problem consisting on the use of sigma-delta modulation in order to(More)
In this work, a correlation between Event Related Potential (ERP) and visual memory, generally located in occipito-temporal region was found for two classes of subject: a sample with high risk (HR) for alcoholism and a sample of control subjects with low risk (LR). For the ERPs of matching stimulus we describe an application of an artificial neural network(More)
Future technologies will present devices so small that they will be heavily influenced by electromagnetic noise and SEU induced errors. Since many soft errors might appear at the same time, classical fault tolerance techniques, such as TMR, will no longer provide reliable protection and will make new design approaches necessary. This study shows that the(More)
The focus of this work is the testing of RF signal paths, specially mixers. The presented technique is based on spectral analysis and subsampling. It enables the partitioning of the RF signal path, making it easier to locate faulty stages. A synchronization scheme is proposed in order to enable the direct sampling of the high frequency signal, thus avoiding(More)
The necessity for programmable analog devices appears when it is necessary to ease the design process in small time and with minimum costs, making the research in FPAAs (Field Programmable Analog Array) more intense. In this work we proposed a new FPAA topology aiming at wide frequency range, while keeping a high degree of reconfigurability. The impact in(More)