Search results for: J Sebastián
chapter
Current-mode control in digitally-controlled switched-mode power supplies typically requires analog-to-digital (A/D) conversion of at least two signals, voltage and current. The complexity of voltage A/D converters can be reduced using window A/D techniques. In conventional current A/D conversion, however, relatively high resolution is required over a wide range of signals, which results in increased...
chapter
This paper proposes a multiphase modulator (MPM) for digitally-controlled multiphase buck converters. A recently developed power digital-to-analog converter (DAC) approach allow mismatch-error noise-shaping techniques to be used to build a very simple, hardware-efficient MPM. The proposed modulator is able to generate the control pulses for each phase using a single, low-frequency clock, and to achieve...
article
Process Biochemistry > 2004 > 39 > 11 > 1793-1802
Direct monitoring of bed conditions in large scale solid-state fermentation (SSF) bioreactors is difficult due to lack of reliable and affordable instrumentation. Although, relevant variables such as average bed temperature and water content can be inferred from energy and water balances, these estimations are prone to significant error since the process is complex and measured variables are extremely...
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Journal of Magnetism and Magnetic Materials > 1996 > 160 > 241-242
The impedance response of low, negative magnetostriction amorphous wires of composition (Co 0 . 9 4 Fe 0 . 0 6 ) 7 2 . 5 B 1 2 . 5 Si 1 0 has been measured in the frequency range 100 Hz-40 MHz, under axial fields 0-8000 A/m. The results are modeled by a combination of RL series and RL parallel equivalent circuits,...
