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We present a new approach to design resonant dc–dc converters, that allows us to achieve both a more accurate implementation and a simpler architecture, by reducing the number of required passive components. The approach is applied to a class-E topology, and it is based on the analytic solution of the system of differential equations regulating the converter evolution. Our technique is also capable...
Wireless sensor nodes capable of acquiring and transmitting biosignals are increasingly important to address future needs in healthcare monitoring. One of the main issues in designing these systems is the unavoidable energy constraint due to the limited battery lifetime, which strictly limits the amount of data that may be transmitted. Compressed Sensing (CS) is an emerging technique for introducing...
We report a low cost mobile EEG system for characterizing cortical auditory responses. The system is built using commercial off-the-shelf components and each unit costs less than $200. It measures seven EEG channels plus one audio channel (envelope only), and communicates the data to external devices via Bluetooth. A novel implementation was pursued in order to support local signal compression using...
Spread spectrum clocking (SSC) has recently emerged as a very effective solution to mitigate electromagnetic interference (EMI) issues. In last years it has been widely used in switching dc/dc converters, in particular in class-D ones, i.e., that based on pulse-width modulation. Conversely, it finds no application in resonant ones. Within this paper we investigate the effects of applying SSC techniques...
Power-Line Communication (PLC) systems represent a very interesting opportunity for introducing low-cost communication capabilities over already existing power-line wires. In this paper we introduce a PLC technique that can be applied to systems with a DC power bus that employ a switching power converter as main power supply unit. The proposed technique is extremely simple to be implemented, and requires...
Resonant power converters represent a step further in the effort of increasing the operating frequency, and consequently the power density, with respect to conventional switching converter architectures. Nevertheless, resonant converters are used only in very specific applications. The main issue is their design that, being not based on a solid mathematical background, results in a non-trivial task...
This paper presents a new approach for the design of a class-E resonant dc-dc converter. The small number of passive components featured by the considered topology allows to exactly solve the differential equations regulating the circuit evolution, and to develop a semi-analytic design procedure based on the differential equations solution. This represents an important breakthrough with respect to...
In this paper we take into account the rakeness approach in the design of Compressed Sensing (CS) based system, which allows, by means of the matching of some statistical properties of the CS sampling functions with statistical features of the input signal, to greatly increase system performance in terms of either a reduction of resources (hardware, energy, etc) required for the signal acquisition...
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