Many applications call for high step-up dc–dc converters that do not require isolation. Some dc–dc converters can provide high step-up voltage gain, but with the penalty of either an extreme duty ratio or a large amount of circulating energy. DC–DC converters with coupled inductors can provide high voltage gain, but their efficiency is degraded by the losses associated with leakage inductors. C...

Usually basic dc-dc boost converters are unable to provide high step up voltage gain due to the effect of power switches, rectifier diodes and equivalent series resistance of inductors and capacitors and the voltage stresses on the power switches are high. This paper proposes a simple transformerless dc-dc converters to achieve high step up voltage gain without an extremely high duty ratio. The...

This paper presents the comparative analysis of improved quality three phase AC/DC boost converters, using SIMULINK. Comparison of three phase controlled single switch and six switch AC/DC boost converters have been done to identify the boost converter with low cost/small size/high efficiency for three phase system. Three phase AC/DC boost converters with improved quality in terms of power fact...

In signal processing circuits of a RDIF tag, the relaxation of restriction concerning operating voltage range enables us to develop various applications. In order to provide higher voltage to the signal processing circuit, two types of step-up AC-DC converters for RFID tags are proposed in this paper: the step-up converter and the step-up converter. To reduce ripple noise of output voltage, the...

Game semantics [7, 1] and the Geometry of Interaction [6] are semantic frameworks centered around the dynamic, interactive behaviour of the interpreted object rather than on its static, extensional properties. The obtained semantics is often fully abstract, and its concreteness can be exploited in the definition of compilation schemes towards low-level languages, like in the Geometry of Synthes...

We consider the problem of broadcasting multiple messages from one processor to many processors in the k-port model for message passing systems. In such systems, processors communicate in rounds, where in every round, each processor can send k messages to k processors and receive k messages from k processors. In this paper, we first present a simple and practical algorithm based on variations o...

When multiple radio-frequency sources are connected to multiple loads through a passive multiport matching network, perfect power transfer to the loads across all frequencies is generally impossible. In this two-part paper, we provide analyses of bandwidth over which power transfer is possible. Our principal tools include broadband multiport matching upper bounds, presented herein, on the integ...

Background Striatal atrophy is detectable many years before the predicted onset of motor symptoms in premanifest Huntington's disease (HD). However, the extent of these neurodegenerative changes at the actual time of conversion from premanifest to a motor manifest disease stage is not known. With this study, we aimed to assess differences in degree and rate of atrophy between converters, i.e. p...

Wavelength routed optical networks have emerged as a technology that can effectively utilize the enormous bandwidth of the optical ®ber. Wavelength converters play an important role in enhancing the ®ber utilization and reducing the overall call blocking probability of the network. Placement of wavelength converters is an NP-complete problem (K.C. Lee, V.O.K. Li, IEEE Journal of Lightwave Techn...