نتایج جستجو برای: switching frequency

تعداد نتایج: 549286  

2008
Y.-T. Cui J. C. Sankey C. Wang K. V. Thadani

The torque generated by the transfer of spin angular momentum from a spin-polarized current to a nanoscale ferromagnet can switch the orientation of the nanomagnet much more efficiently than a current-generated magnetic field and is therefore in development for use in next-generation magnetic random access memory MRAM . Up to now, experiments have focused on spin-torque switching driven by simp...

Journal: :IEEE Trans. Industrial Electronics 2000
Vinicius M. Pacheco Acrísio José do Nascimento Valdeir José Farias João Batista Vieira Luiz Carlos Gomes de Freitas

High switching frequency associated with soft commutation techniques is a new trend in switching converters. Following this trend, the authors present a buck pulsewidth modulation converter, where the dc voltage conversion ratio has a quadratic dependence on duty cycle, providing a large step-down. By introducing two resonant networks, soft switching is attained, providing highly efficient oper...

2016
Rajesh K M V Sudarsan Lung-Sheng Yang Tsorng-Juu Liang

This paper presents the design and simulation of the zero voltage zero current switched non isolated dcdc boost converter. Many applications powered by batteries need high performance, high step up dc-dc converters. When the converter switches are turned on and off at high frequency to meet dynamic and steady state requirements, the losses add on in the converter. When current through the switc...

1998
Chi-Chang Wang Jiin-chuan Wu

Conventional charge pump circuits use a fixed switching frequency that leads to power efficiency degradation for loading less than the rated loading. This paper proposes a level shifter design that also functions as a frequency converter to automatically vary the switching frequency of a dual charge pump circuit according to the loading. The switching frequency is designed to be 25 kHz with 12 ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2006
D Ryvkine M I Dykman

We study a parametrically modulated oscillator that has two stable states of vibration at half the modulation frequency omega{F}. Fluctuations of the oscillator lead to interstate switching. A comparatively weak additional field can strongly affect the switching rates because it changes the switching activation energies. The change is linear in the field amplitude. When the additional field fre...

Journal: :Genetics 2001
A J Klar T Srikantha D R Soll

Most strains of Candida albicans undergo high frequency phenotypic switching. Strain WO-1 undergoes the white-opaque transition, which involves changes in colony and cellular morphology, gene expression, and virulence. We have hypothesized that the switch event involves heritable changes in chromatin structure. To test this hypothesis, we transiently exposed cells to the histone deacetylase inh...

2014
Vojko Matko Miro Milanovic

This article proposes a novel method for the temperature-compensated inductance-to-frequency converter with a single quartz crystal oscillating in the switching oscillating circuit to achieve better temperature stability of the converter. The novelty of this method lies in the switching-mode converter, the use of additionally connected impedances in parallel to the shunt capacitances of the qua...

2012
Pranay S. Shete Rohit G. Kanojiya Nirajkumar S. Maurya

In this paper a new sinusoidal PWM inverter suitable for use with power MOSFETs is described. . The output waveforms in the proposed PWM inverter are investigated both theoretically and experimentally. The fundamental component of the three-phase line-to-line voltage is increased by about 15 percent above than that of the conventional sine-wave inverter. The sinusoidal PWM switching scheme allo...

2016
Arturo Buscarino Mattia Frasca Marco Branciforte Luigi Fortuna Clinton Sprott Julien Clinton Sprott

In this paper, we study a system of two Rössler oscillators coupled througha time-varying link, periodically switching between two values.We analyze the system behavior with respect to the switching frequency. By applying an averaging technique under the hypothesis of high switching frequency, we find that, although each value of the coupling is not suitable for synchronization, switching betwe...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید