Browsing Artículos de revista DIEC - IEKS Aldizkari artikuluak by Title
Now showing items 1-20 of 393
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±0.25 V Class-AB CMOS capacitance multiplier and precision rectifiers
Pourashraf, Shirin; Ramírez-Angulo, Jaime; Hinojo Montero, José María; González Carvajal, Ramón; López Martín, Antonio
(IEEE, 2019)
Artículo / Artikulua 
Reduction of minimum supply requirements is a crucial aspect to decrease the power consumption in VLSI systems. A high performance capacitance multiplier able to operate with supplies as low as ±0.25 V is presented. It is ... -
±0.3v bulk-driven fully differential buffer with high figures of merit
Gangineni, Manaswini; Ramírez-Angulo, Jaime; Vázquez-Leal, Héctor; Huerta-Chua, Jesús; López Martín, Antonio ; González Carvajal, Ramón (MDPI, 2022)
Artículo / Artikulua
A high performance bulk-driven rail-to-rail fully differential buffer operating from ±0.3V supplies in 180 nm CMOS technology is reported. It has a differential–difference input stage and common mode feedback circuits ... -
0.6-V 1.65-uW second-order Gm-C bandpass filter for multi-frequency bioimpedance analysis based on a bootstrapped bulk-driven voltage buffer
Carrillo, Juan M.; Cruz Blas, Carlos Aristóteles de la (MDPI, 2022)
Artículo / Artikulua
A bootstrapping technique used to increase the intrinsic voltage gain of a bulk-driven MOS transistor is described in this paper. The proposed circuit incorporates a capacitor and a cutoff transistor to be connected to ... -
A 3-D indoor analysis of path loss modeling using kriging techniques
Diago Mosquera, Melissa; Aragón Zavala, Alejandro; Azpilicueta Fernández de las Heras, Leyre ; Shubair, Raed M.; Falcone Lanas, Francisco (IEEE, 2022)
Artículo / Artikulua
This study proposes a novel measurement-based method to predict and model three-dimensional (3-D) path loss in indoor scenarios, which first regresses 28 GHz measurements via median path loss modeling and then includes ... -
3-D-printed transmit-array antenna for broadband backhaul 5G links at V-band
Matos, Sérgio A.; Teixeira, Jorge P.; Costa, Jorge R.; Fernandes, Carlos A.; Río Bocio, Carlos del (IEEE, 2020)
Artículo / Artikulua
The low cost and compactness of transmit-array antennas (TAs) make them attractive for 5G backhaul links. However, the TA advantage is less obvious when considering the broadband operation requirement. Two main factors ... -
300 GHz optoelectronic transmitter combining integrated photonics and electronic multipliers for wireless communication
Ali, Muhsin; Pérez Escudero, José Manuel ; Guzmán Martínez, Robinson Cruzoe; Lo, Mu Chieh; Ederra Urzainqui, Íñigo ; Gonzalo García, Ramón ; García Muñoz, Luis Enrique (MDPI, 2019)
Artículo / Artikulua
THz communications systems at carrier frequencies above 200 GHz are the key to enable next-generation mobile communication networks with 100 Gbit/s wireless data rates. One of the key questions is, which carrier frequency ... -
360 nW gate-driven ultra-low voltage CMOS linear transconductor with 1 MHz bandwidth and wide input range
Rico-Aniles, Héctor Daniel; Ramírez-Angulo, Jaime; López Martín, Antonio ; González Carvajal, Ramón (IEEE, 2020)
Artículo / Artikulua
A low voltage linear transconductor is introduced. The circuit is a pseudo differential architecture that operates with ±0.2V supplies and uses 900nA total biasing current. It employs a floating battery technique to achieve ... -
A 3D ray launching time-frequency channel modeling approach for UWB ranging applications
Otim, Timothy; López Iturri, Peio ; Azpilicueta Fernández de las Heras, Leyre ; Bahillo, Alfonso; Falcone Lanas, Francisco Javier (IEEE, 2020)
Artículo / Artikulua
Ultrawideband (UWB) has the ability to achieve decimetre level of ranging accuracy, hence, its wider usage nowadays in the field of positioning. In spite of the attractiveness of UWB, its performance is strongly dependent ... -
3D-ray launching MIMO channel geometric estimation
Rodríguez Corbo, Fidel Alejandro; Azpilicueta Fernández de las Heras, Leyre ; Celaya Echarri, Mikel; Shubair, Raed M.; Falcone Lanas, Francisco (IEEE, 2022)
Artículo / Artikulua
The complete multiple-input–multiple-output (MIMO) channel simulation in deterministic techniques can be a computationally intensive task, due to the inherent scenario’s complexity and number of antennas. The spatial ... -
5G spatial modeling of personal RF-EMF assessment within aircrafts cabin environments
Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre ; Rodríguez Corbo, Fidel Alejandro; López Iturri, Peio ; Shubair, Raed M.; Ramos González, Victoria; Falcone Lanas, Francisco (IEEE, 2022)
Artículo / Artikulua
Recently, new wireless communication systems within aircrafts cabins have drawn higher attention due to the growing demand of passenger services and applications and their corresponding requirements and constraints. In ... -
60 GHz single-layer slot-array antenna fed by groove gap waveguide
Ferrando Rocher, Miguel; Valero Nogueira, Alejandro; Herranz Herruzo, José I.; Teniente Vallinas, Jorge (IEEE, 2019)
Artículo / Artikulua
A V-band single-layer low-loss slot-array antenna is presented in this letter. Radiating slots are backed by coaxial cavities, which are fed through a groove gap waveguide E-plane corporate feed network. Cavity resonances ... -
AC amplifiers with ultra-low corner frequency by using bootstrapping
Martincorena Arraiza, Maite ; Carlosena García, Alfonso ; De la Cruz Blas, Carlos A.; López Martín, Antonio (Institution of Engineering and Technology, 2021)
Artículo / Artikulua
A novel architecture for an AC (i.e. high-pass) amplifier is proposed allowing a drastic reduction of the cutoff frequency to the sub-Hertz range. It builds upon the classic AC configuration with a high gain amplifier and ... -
AC coupled amplifier with a resistance multiplier technique for ultra-low frequency operation
Martincorena Arraiza, Maite ; Cruz Blas, Carlos Aristóteles de la ; Carlosena García, Alfonso ; López Martín, Antonio (Elsevier, 2022)
Artículo / Artikulua
This paper proposes a novel, tunable AC coupled capacitive feedback amplifier, exhibiting an ultra-low high pass corner frequency. This is accomplished by actively boosting the output resistive value of a MOS transistor ... -
Accurate pupil center detection in off-the-shelf eye tracking systems using convolutional neural networks
Larumbe Bergera, Andoni ; Garde Lecumberri, Gonzalo ; Porta Cuéllar, Sonia ; Cabeza Laguna, Rafael ; Villanueva Larre, Arantxa (MDPI, 2021)
Artículo / Artikulua
Remote eye tracking technology has suffered an increasing growth in recent years due to its applicability in many research areas. In this paper, a video-oculography method based on convolutional neural networks (CNNs) for ... -
Advanced graphene-based transparent conductive electrodes for photovoltaic applications
Fernández, Susana; Boscá, Alberto; Pedrós, Jorge; Inés Ortigosa, Andrea; Fernández Vallejo, Montserrat; Arnedo Gil, Israel ; González, José Pablo (MDPI, 2019)
Artículo / Artikulua
New architectures of transparent conductive electrodes (TCEs) incorporating graphene monolayers in different configurations have been explored with the aim to improve the performance of silicon-heterojunction (SHJ) cell ... -
Advances in fiber optic DNA-based sensors: a review
Santano, Desiree ; Urrutia Azcona, Aitor ; Ruiz Zamarreño, Carlos ; Del Villar, Ignacio (IEEE, 2021)
Artículo / Artikulua
DNA is becoming increasingly important in the domain of optical fiber sensors, either as a tool for biosensing, or as a target to detect. In this review the main contributions of the last years are presented both in the ... -
Aggregator to electric vehicle LoRaWAN based communication analysis in vehicle-to-grid systems in smart cities
Klaina, Hicham; Picallo Guembe, Imanol ; López Iturri, Peio ; Astrain Escola, José Javier ; Azpilicueta Fernández de las Heras, Leyre ; Falcone Lanas, Francisco Javier (IEEE, 2020)
Artículo / Artikulua
Recently, there has been growing attention to the power grid management due to the increasing concerns on global warming. With the advancement in electric vehicles (EV) industry and the evolution in batteries, EVs become ... -
All-fiber ellipsometer for nanoscale dielectric coatings
Imas González, José Javier ; Matías Maestro, Ignacio ; Del Villar, Ignacio ; Ozcariz Celaya, Aritz ; Ruiz Zamarreño, Carlos ; Albert, Jacques (Chinese Academy of Sciences, 2023)
Artículo / Artikulua
Multiple mode resonance shifts in tilted fiber Bragg gratings (TFBGs) are used to simultaneously measure the thickness and the refractive index of TiO2 thin films formed by Atomic Layer Deposition (ALD) on optical fibers. ... -
Aluminum doped zinc oxide (AZO) coated optical fiber LMR refractometers. An experimental demonstration
Ozcariz Celaya, Aritz ; Piña-Azamar, Dafne A.; Ruiz Zamarreño, Carlos ; Domínguez Cruz, René; Arregui San Martín, Francisco Javier (Elsevier, 2019)
Artículo / Artikulua
This work presents the experimental demonstration of lossy mode resonance generation by means of aluminum doped zinc oxide thin-films. The use of such material may allow to optimize the performance of LMR-based sensors, ... -
Ammonia gas optical sensor based on lossy mode resonances
Armas, Dayron; Zubiate Orzanco, Pablo ; Ruiz Zamarreño, Carlos ; Matías Maestro, Ignacio (IEEE, 2023)
Artículo / Artikulua
This letter presents the fabrication and characterization of an ammonia (NH 3) gas optical sensor based on lossy mode resonances (LMRs). A chromium (III) oxide (Cr 2 O 3) thin film deposited onto a planar waveguide was ...
