Fabio Bisogno

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— This paper presents a simple alternative of automatic luminous control for electronic ballasts operating in self-sustained oscillating mode feeding fluorescent lamps to energy saving. The luminous flux level control is based on a signal from a lighting dependent resistor, which measures the luminous flux level. The dimming feature is obtained using(More)
Design for specific customer service plays a crucial role for the majority of the market in modern electronics. However, adaptability to an individual customer results in increasing design costs. A key to manage these opposite requirements is a wide application of computer aided design tools for multi-objective optimisation of existing IP blocks. In this(More)
This paper presents a comparative analysis of dimmable self-oscillating electronic ballast for fluorescent lamps. A review of general dimming methods presented in the literature is performed. A general analysis of each dimming method is made, and the operation with power factor correction was considered in order to evaluate the characteristic of each(More)
This paper presents an electronic ballast to operate HO fluorescent lamps with power ratings of 24 W, 39 W and 49 W. The proposed circuit detects the lamp type by its operation voltage and sets duty cycle of the power factor correction circuit to adequate the output power. Experimental results are shown to demonstrate the feasibility of the proposed(More)
This paper provides a robust state feedback controller applied for an active suspension system. The controller presents guaranteed capacity to reject disturbances from the road even when the sprung mass of the vehicle is uncertain. The control gains are given from the solution of the H<inf>&#x221E;</inf> guaranteed cost controller under quadratic stability,(More)
This paper deals with the thermal characteristics of the <i>I</i> -<i>V</i> curve of GaN-based white light-emitting diodes (LEDs), focused on the variations of the dynamic resistance. The final goal of this study is to improve the static and dynamic operations of the LED driver within a wide range of temperatures. Four LEDs from different manufacturers were(More)
This paper presents an analysis and design of a Light Emitting Diode (LED) driver aiming to substitute the electrolytic capacitors. Considering the low lifetime of electrolytic capacitors compared to LEDs, this topology aims for reducing the storage capacitance and replaces it by a longer lifetime capacitor, increasing the overall system life span. A(More)