Abstract-This paper shows the design of a hybrid on-chip VLSI DC-DC converter for low to medium integrated circuit power consumption that combines a switching and a linear regulator in parallel. The main goal is to take the best of both approaches, obtaining good power efficiency as in switching converters with small voltage output ripple as in linear converters. While the switching regulator is used to drive most of the load current, the linear regulator supplies the required current to filter out the steady state ripple due to inductor switching without the need of a filtering output capacitor. In addition, the latter regulator supplies the required current when the load changes abruptly and the inductor current is momentarily insufficient. The design has been tested with simulations using a standard 180 nm CMOS technology showing good performance.
Abstract. Linear-switching hybrid DC/DC converters consist of a voltage linear regulator (classic NPN or nMOS topologies and LDO) connected in parallel with a switching DC/DC converter. In order to control these hybrid structures, different strategies exist, allowing to fix the switching frequency as a function of some parameters of the linear regulator. This article compares two control strategies that, although they can be applied to the same circuital structure of linear-assisted converter, they are slightly different. The first one, reported in previous literature, cancels completely the average current through the linear regulator in steady state to achieve a reduction of power losses. Thus, the efficiency of the whole system increases and almost equals the one of the standalone switching converter. The proposed approach, in spite of a slightly increment of linear regulator's losses, reduces the output ripple that is caused by the crossover distortion of linear regulator output stage.
Abstract. This paper presents the design of a LDO-assisted DC-DC converters in Cadence Virtuoso based on a 350-nm CMOS technology. This kind of voltage regulators consists of a switching converter together with a classic or LDO (low dropout) linear voltage regulator. While the linear regulator provides the constant output voltage, the switching converter conducts nearly all the current provided in the output load, and keeping the regulator current close to zero where the higher efficiency is achieved. In addition, current article shows the modeling in Matlab/Simulink. This modeling is mandatory in order to predict and assure the stability of the circuit. In addition, it can allow improving the performance of the circuit.
In this work, the architecture of a system intended for bioinspired environment perception is described. Considering the technology trends and applications requirements, the properties of such a system are discussed. The system consists of four main blocks: a) A set of different integrated microsensors and microactuators with the associated signal conditioning circuits; b) A data encoding block that in its simplest form performs spike encoding of information; c) a bioinspired digital processing block that efficiently emulates a spiking neuron network; d) a monitoring and self-adaptation block that provides feedback to the sensors and actuators. In its final implementation, the full system would eventually be almost fully integrated in a CMOS integrated circuit.
Abstract.As it is well known, the Bologna Process is a voluntary intergovernmental European cooperation initiative that led to the creation of the named European Higher Education Area (EHEA). EHEA was formed to promote mobility, increase academic recognition and attract students and staff from around the world to Europe. On the other hand, since September 2016, the Technical University of Catalonia (Universitat Politècnica de Catalunya, UPC) -BarcelonaTech has a new Campus in Barcelona City, the Diagonal-Besòs Campus. In this new Campus appears the Eastern Barcelona School of Engineering (Escola d'Enginyeria de Barcelona Est, EEBE), with new Bachelor's and Master's Degrees. In this framework, also since September 2016, the EEBE is offering the new 4-year Bachelor's Degree in Energy Engineering with a total number of 240 ECTS credits. Current article deals with the inclusion of the course about sizing and design of renewable energy systems in the context of this degree. In particular, and although this topic was eventually abandoned in the initial degree curriculum, the paper presents the development of a 3 rd -year course, Renewable Energies, that focuses on this topic.
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