Wyniki 1-2 spośród 2 dla zapytania: authorDesc:"Ahmed DERROUAZIN"

Integrated Solenoid Inductor with Magnetic Core in a Buck Converter DOI:10.15199/48.2019.08.22

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The recent evolution in radiofrequency (RF) devices and integrated circuit technologies greatly expanded the number of wireless applications [1]. This expansion generated a growing demand for semiconductor manufacturers, requiring a higher integration in RF circuits. However, as passive device performances are directly tied to their geometry (especially for inductors), they end up being the bottleneck on radiofrequency circuitry integration. Inductors are of utmost importance in radiofrequency integrated circuits [2]. These devices are employed in critical building blocks of radiofrequency integrated circuits such as intermediate frequency filters [2], low-noise amplifiers [3], voltage-controlled oscillators [4], and power amplifiers [5]. Current on-chip spiral inductors suffer from large parasitic and area for a meager value of inductance and quality factor [6]. The need to overcome these issues has led to the development inductors with new geometries housing magnetic cores that show an enhanced inductance compared to the air core coil. In this paper, the behavior of solenoid inductors is systematically studied and the impact of the geometrical parameters on its inductance and quality factor. The principal object of my paper is to detail all the phases of design and modeling of a solenoid inductor in order to attain its realization and integrate it into a micro-converter [7]. This structure increases the quality factor value while reducing the constituent dimensions with a small manufacturing cost [8]. Design of solenoid inductor A simple solenoid inductor consists of a metal wire wound around a magnetic core, as shown in figure 1 [9]. Geometric parameters used in the schematic of an integrated solenoid inductor are as follows: the number of turns of the coil N, length of the coil lc, length of the magnetic core (air core) lm, spacing between turns s, width of the magnetic core wm, width of the air core wa, width of coi[...]

Integrated square shape inductor with magnetic core in a buck converter DC-DC DOI:10.15199/48.2019.09.11

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The always-augmenting demand for multifunctional and undersize portable electronic devices is driving the improvement of miniaturized DC-DC converters [1  3]. Such converters are used to shift voltage levels in electronic systems with high efficiency. There are multiple applications for such converters. For example, state-of-the-art portable smart phones and tablet PCs feature multiple components, such as the display panel, MEMS sensors, data storage devices, and cameras, which may require different operating voltage levels. Miniaturizing these converters reduces the overall size of the portable devices [4]. Passive components are the major factor in determining the overall size, cost and performance of portable products. The drive to further miniaturization and integration of portable electronic devices has recently focused on the task of passive functions [5, 6]. Integration of passive devices in the same silicon substrate is desirable in order to reduce this interconnect parasitic, reduce the size and cost of the units and increase the operating frequencies of the radio frequency circuits. Inductors are elementary and important parts in radio frequency integrated circuits [7, 8]. In this paper, the behavior of inductor is systematically studied and the impact of the geometrical parameters on its inductance and quality factor. The principal object of my paper is to detail all the phases of design and modeling of square shape inductor in order to attain its simulation and integrate it into a buck converter. This power inductor with magnetic core increases the quality factor value while reducing the constituent dimensions with a small manufacturing cost. Buck converter DC-DC The buck converter circuit is shown in figure 1. The switch T has a duty cycle D which ranges from 0 to 1. Figure 2 indicates relevant waveforms of the circuit when the switch T is turned ON and OFF at frequency f, with a duty cycle D [9]. T[...]

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