Exploració per autor "Pallàs-Areny, Ramon"
Ara es mostren els items 40-59 de 127
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Circuits i sistemes electrònics. Examen final
Pallàs-Areny, Ramon (Universitat Politècnica de Catalunya, 2013-06-26)
Examen
Accés restringit a la comunitat UPC -
Circuits i sistemes electrònics. Preguntes de teoria i problemes
Pallàs-Areny, Ramon (Universitat Politècnica de Catalunya, 2013-04-26)
Examen
Accés restringit a la comunitat UPC -
Circuits i sistemes electrònics. Preguntes de teoria i problemes
Pallàs-Areny, Ramon (Universitat Politècnica de Catalunya, 2014-04-11)
Examen
Accés restringit a la comunitat UPC -
Comments on "On resistor-induced thermal noise in linear circuits"
Vargas Drechsler, Manuel; Pallàs-Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-04-30)
Working paper
Accés obertCorrespondència referida a l'article de R. Giannetti, publicat ibid. vol.49 p.87-88 -
Comments on “A novel high input impedance front-end for capacitive biopotential measurement”
Pallàs-Areny, Ramon (Springer, 2019-12-13)
Article
Accés obertA front-end for biopotential sensing in wearable medical devices has been recently proposed which is claimed to provide 100 GOinput impedance by manually matching two resistor pairs in a positive- and a negative-feedback ... -
Common mode electronic noise in differential circuits
Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon (2019-07-01)
Article
Accés obertDifferential circuits are assumed to reject common-mode noise yet no parameter is available to describethat rejection as the Common Mode Rejection Ratio (CMRR) applies only to deterministic signals, not torandom noise. We ... -
Common mode response effects in differential measurements
Hornero Ocaña, Gemma; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon (2021-01)
Article
Accés obertDifferential measurements yield signals that are conditioned by differential or fully differential circuits which output depends on both the differential- and common-mode input voltages. Differential signals carry the ... -
La Compatibilidad electromagnética, un problema en la sociedad actual
Pallàs-Areny, Ramon; Silva, Ferran (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1999)
Article
Accés obert -
Compensation of impedance meters when using an external front-end amplifier
Torrents Dolz, Josep M.; Pallàs-Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-04-30)
Article
Accés obertFour-terminal impedance meters based on pseudo-bridges yield unexpected uncertainties when using high-contact-impedance electrodes. Adding a front-end amplifier to the impedance meter and rearranging the connection of the ... -
Consideraciones sobre la denominación de los electrodos para señales bioeléctricas externas
Díaz Cerecedo, Delia; Luna Lozano, P. S.; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon (2012)
Comunicació de congrés
Accés obert -
Constant-phase element identification in conductivity sensors using a single square wave
Lario García, Javier; Pallàs-Areny, Ramon (Elsevier, 2006-11-08)
Article
Accés obertThis paper proposes a novel method to measure the electrical conductivity of solutions in the time domain by using a single square-wave current and two titanium electrodes. This method allows us to determine both the ... -
Cost-effective autonomous sensor for the long-term monitoring of water electrical conductivity of crop fields
Serrano Finetti, Roberto Ernesto; Aliau Bonet, Carles; López Lapeña, Oscar; Pallàs-Areny, Ramon (2019-10-01)
Article
Accés obertSalinity is a key parameter determining water quality. In agriculture, irrigation water with high salinity levels impacts plant growth and yield negatively hence there is a need to monitor it and irrigate with fresh water ... -
Detección del ritmo cardiaco midiendo bioimpedancia plantar con elecrodos capacitivos
Díaz, Delia H.; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon (UNIVERSIDAD CARLOS III DE MADRID, 2010)
Text en actes de congrés
Accés restringit per política de l'editorialLas básculas de baño electrónicas son un medio sencillo y asequible para medir, además del peso corporal, el balistocardiograma (BCG) y a partir de él extraer el ritmo cardíaco, y estimar variaciones en el gasto cardíaco ... -
Direct interface for capacitive sensors based on the charge transfer method
Gaitán Pitre, Jorge Eliécer; Gasulla Forner, Manuel; Pallàs-Areny, Ramon (2007-05-01)
Text en actes de congrés
Accés obertWe present the theoretical analysis and experimental performance results of a direct interface for capacitive sensors based on the charge transfer method when parasitic capacitances are included. The interface circuit ... -
Direct pulse transit time measurement from an electronic weighing scale
Gómez Clapers, Joan; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (2016)
Text en actes de congrés
Accés restringit per política de l'editorialA novel method to measure Pulse Transit Time (PTT) from the force sensors of a modified electronic weighing scale is presented. The method relies on the relation between PTT and the interval between I and J waves of the ... -
Dispositivo y método para medir magnitudes eléctricas de sensores analógicos
Gaitán Pitre, Jorge Eliécer; Pallàs-Areny, Ramon (2014-11-07)
Altres
Accés restringit per acord de confidencialitatLa presente solicitud de patente tiene por objeto un dispositivo y método para medir magnitudes eléctricas de sensores analógicos, que 10 incorpora notables innovaciones y ventajas. La presente invención se refiere, en ... -
Do ventricular repolarization interval ratios depend on heart rate and should they be rate-corrected?
Alvarado Serrano, Carlos; Ramos Castro, Juan José; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2003-09)
Text en actes de congrés
Accés obertQT interval decreases with increasing heart rate (HR), hence to define normal values of QT interval for different heart rates requires the application of a QT interval rate correction formula. However, the influence of HR ... -
Efecto de las capacidades parásitas a tierra en las medidas de impedancia eléctrica con dos terminales
Aliau Bonet, Carles; Pallàs-Areny, Ramon (2011)
Text en actes de congrés
Accés obert -
Efectos de la absorción dieléctrica en circuitos de transferencia de carga para sensores capacitivos
Pallàs-Areny, Ramon; Gaitán Pitre, Jorge Eliécer (2015)
Comunicació de congrés
Accés obertSe presenta un análisis experimental del efecto de la absorción dieléctrica en el condensador de referencia empleado en circuitos de interfaz entre sensores capacitivos y microcontrolador basados en la transferencia de ... -
Effects of interelectrode capacitance in water conductivity measurements with capacitive electrodes
Pallàs-Areny, Ramon; Aliau Bonet, Carles (2015)
Text en actes de congrés
Accés obert