Hugo A. Ferreira

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This paper presents a hand-held microsystem based on new fully integrated magnetoresistive biochips for biomolecular recognition (DNA hybridisation, antibody antigen interaction, etc.). These biochips use magnetic field arraying of magnetically tagged biomolecules and high sensitivity sensors which potentially detect single or few biomolecules.(More)
— This paper presents a recently developed hand-held biochip-based microsystem. The microsystem is based on a magneto-resistive array biochip composed of a number of sensing sites with magnetic tunneling junctions (MTJ) and diodes. To drive the MTJ, different techniques are addressed with different types of signals. Filtering strategies are also presented,(More)
Transcranial direct current stimulation (tDCS) has proven to be a useful tool in the scientific research community, particularly for clinical investigation purposes. Neuroimaging studies indicate that there is a connection between the prefrontal cortex (PFC) and working memory (WM), as well as between the primary motor cortex and reaction time (RT). Thus,(More)
Electroencephalography (EEG) signals' interpretation is based on waveform analysis, where meaningful information should emerge from a plethora of data. Nonetheless, the continuous increase in computational power and the development of new data processing algorithms in the recent years have put into reach the possibility of analyzing raw EEG signals. Bearing(More)
This paper describes the work on temperature modelling of an Electronic Detection Cell (EDC) for DNA analysis. The EDC is part of a biochip which is under development at INESC. The main goal of the project is to build a hand-held biochip with several sites for running simultaneous detection experiments with independent temperature profiles. The basic DNA(More)
This paper presents a microsystem for biomolecular recognition (DNA, enzymes) based on a biochip, which uses magnetic field arraying of magnetically tagged biomolecules and high sensitivity sensors for single biomolecule detection. The microsystem provides the electronic circuitry for addressing, reading out and sensing each of the 16 × 16 magnetoresistive(More)
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