Browsing by Author "Abusleme, A."

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    Mismatch of lateral field metal-oxide-metal capacitors in 180 nm CMOS process
    (INST ENGINEERING TECHNOLOGY-IET, 2012) Abusleme, A.; Dragone, A.; Haller, G.; Murmann, B.
    Metal-oxide-metal (MOM) capacitors represent an attractive alternative to metal-insulator-metal (MIM) capacitors in mixed-signal integrated circuits. Since they are made of metal lines, they can be integrated in standard CMOS processes, and tailored over a wide range of sizes. Mismatch data of MOM capacitors, however, is scarce and typically conservative. Presented is the design and the test results of a custom ADC that employs an array of 1024 MOM capacitors sized at 2 fF. Static performance metrics are presented and compared with those for an ADC based on MIM capacitors. Mismatch data is computed from the results.
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    Neutrino physics with an opaque detector
    (2021) Cabrera, A.; Abusleme, A.; dos Anjos, J.; Bezerra, T. J. C.; Bongrand, M.; Bourgeois, C.; Breton, D.; Buck, C.; Busto, J.; Calvo, E.; Chauveau, E.; Chen, M.; Chimenti, P.; Dal Corso, F.; De Conto, G.; Dusini, S.; Fiorentini, G.; Martins, C. Frigerio; Givaudan, A.; Govoni, P.; Gramlich, B.; Grassi, M.; Han, Y.; Hartnell, J.; Hugon, C.; Jimenez, S.; de Kerret, H.; Le Neve, A.; Loaiza, P.; Maalmi, J.; Mantovani, F.; Manzanillas, L.; Marquet, C.; Martino, J.; Navas-Nicolas, D.; Nunokawa, H.; Obolensky, M.; Ochoa-Ricoux, J. P.; Ortona, G.; Palomares, C.; Pessina, F.; Pin, A.; Porter, J. C. C.; Pravikoff, M. S.; Roche, M.; Roskovec, B.; Roy, N.; Santos, C.; Schoppmann, S.; Serafini, A.; Simard, L.; Sisti, M.; Stanco, L.; Strati, V; Stutzmann, J-S; Suekane, F.; Verdugo, A.; Viaud, B.; Volpe, C.; Vrignon, C.; Wagner, S.; Yermia, F.
    In 1956 Reines & Cowan discovered the neutrino using a liquid scintillator detector. The neutrinos interacted with the scintillator, producing light that propagated across transparent volumes to surrounding photo-sensors. This approach has remained one of the most widespread and successful neutrino detection technologies used since. This article introduces a concept that breaks with the conventional paradigm of transparency by confining and collecting light near its creation point with an opaque scintillator and a dense array of optical fibres. This technique, called LiquidO, can provide high-resolution imaging to enable efficient identification of individual particles event-by-event. A natural affinity for adding dopants at high concentrations is provided by the use of an opaque medium. With these and other capabilities, the potential of our detector concept to unlock opportunities in neutrino physics is presented here, alongside the results of the first experimental validation.
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    Noise power normalisation: extension of g(m)/I-D technique for noise analysis
    (INST ENGINEERING TECHNOLOGY-IET, 2012) Alvarez, E.; Abusleme, A.
    MOSFET models for deep submicron technologies involve accurate and complex equations not suitable for hand analysis. Although the g(m)/I-D design-oriented approach has overcome this limitation by combining hand calculations with data obtained from SPICE simulations, it has not been systematically used for noise calculations, since the dependence of noise on this parameter is not direct. An attempt to express noise as a function of g(m)/I-D is presented. By introducing the normalised noise concept, noise curves that depend solely on the device length and operation point can be obtained directly from SPICE simulations, and then used in the design flow. The main outcome is a simple design-oriented methodology for noise calculations that does not depend on equations for a specific technology or operating region, and that is easy to migrate among different technologies.
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    VerDAQ: a Versatile Data AcQuisition system for high energy physics experiments
    (2022) Rojas, R.; Kuleshov, S., V; Silva, C.; Carvajal, G.; Abusleme, A.; Hakobyan, H.; Arredondo, V; Gonzalez, J.
    The Versatile Data AcQuisition (VerDAQ) system is a modular and flexible data ac-quisition platform designed to be used in a wide range of high-energy physics experiments, from small desktop detectors to large experiments in accelerators. The main characteristic of VerDAQ is its flexibility that stems from a modular design, separating the front-end electronics in a mezza-nine board from the back-end electronics on a motherboard. The latter includes a programmable System-on-Chip (SoC) that provides preprocessing and communication capabilities. The VerDAQ system is hardware and firmware reconfigurable, enabling its use in standalone instruments as well as integrated into extensive data acquisition systems. In this paper, the system structure is described in detail, and a particular implementation of a laboratory prototype using the DRS4 chip is characterized and used to demonstrate standalone operation.