Exploració per autor "Pallàs-Areny, Ramon"
Ara es mostren els items 38-57 de 127
-
Charge-transfer-based signal interface for differential capacitive sensors
Gaitán Pitre, Jorge Eliécer; Pallàs-Areny, Ramon (2015)
Comunicació de congrés
Accés obertWe propose a circuit to directly connect a differential capacitive sensor to a microcontroller unit (MCU), which is based on the charge-transfer method and does not need any calibration component. The performance has been ... -
Charge-transfer-based signal interface for resistive sensors
Gaitán Pitre, Jorge Eliécer; Pallàs-Areny, Ramon (2015)
Comunicació de congrés
Accés obertCharge transfer has been demonstrated to be a cost-effective method to measure capacitive sensors with low-end microcontrollers. Here we apply charge transfer to measure the output of voltage dividers that include a high ... -
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