نتایج جستجو برای: capacitance

تعداد نتایج: 12164  

Journal: :International Journal of Metrology and Quality Engineering 2017

2001
Minjia Xu T. Hubing J. Drewniak T. Van Doren R. DuBroff

Embedded capacitance is an alternative to discrete decoupling capacitors and is achieved by enhancing the natural capacitance between power and ground planes. New materials have recently been developed by competing companies that promise to reduce the cost and improve the performance of boards with embedded capacitance. This paper introduces simple models for embedded capacitance boards and exa...

2005
W. Petchakit S. Petchakit

In this paper, a technique for realizing a floating capacitance multiplier based on the use of dual output current conveyors and grounded capacitance is proposed. Its multiplication factor can be tuned by changing the ratio of resistors. Moreover, the circuit is easily modified to electronically tunable floating capacitance multiplier by using current controlled conveyor. Simulation results are...

2012
Brinda Bhowmick Srimanta Baishya

In this paper fringe capacitance of double hetero gate Tunnel FET has been studied. The physical model for fringe capacitance is derived considering source gate overlap and gate drain non overlap. Inerface trap charge and oxide charges are also introduced under positive bias stress and hot carrier stress and their effect on fringe capacitance is also studied. The fringe capacitance is significa...

Journal: :Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society 1995
M J Goretsky A P Supp D G Greenhalgh G D Warden S T Boyce

Restoration of the epidermal barrier is a requirement for burn wound closure. A rapid, reliable, and noninvasive measure of the rate of restoration of the epidermal barrier is not readily available. To monitor the reformation of the epidermal barrier, we measured surface electrical capacitance on cultured skin substitutes (human keratinocytes and fibroblasts attached to collagen-glycosaminoglyc...

2016
Rimi Lee Dong hyun Jo Sang J. Chung Hee-Kyung Na Jeong Hun Kim Tae Geol Lee

Nanoparticles have shown great potential as vehicles for the delivery of drugs, nucleic acids, and therapeutic proteins; an efficient, high-throughput screening method to analyze nanoparticle interaction with the cytomembrane would substantially improve the efficiency and accuracy of the delivery. Here, we developed a capacitance sensor array that monitored the capacitance values of nanoparticl...

2004
Shih-Ching Lo Yiming Li Jyun-Hwei Tsai

High-k dielectric materials are being considered as replacement for SiO2 as the gate dielectric while retaining the low equivalent oxide thickness (EOT) required next generation metal oxide semiconductor field effect transistors (MOSFETs). In this paper, we simulate the capacitance – voltage (C-V) of n-type MOSFET devices with different high-k dielectric insulator numerically. According to the ...

Journal: :Physical chemistry chemical physics : PCCP 2014
Yuranan Hanlumyuang Xiaobao Li Pradeep Sharma

Quantum capacitance is a fundamental quantity that can directly reveal many-body interactions among electrons and is expected to play a critical role in nanoelectronics. One of the many tantalizing recent physical revelations about quantum capacitance is that it can possess a negative value, hence allowing for the possibility of enhancing the overall capacitance in some particular material syst...

2011
M. Heidari P. Azimi

In this article design and operation of a parallel-plate capacitive sensor based on the dielectric capacitance and conductance change of the gap medium is reported. The designed system was used to determine characteristics of different water liquids as a result of the capacitance variations. The air gap capacitance is measured and then by filling the gap with a liquid the capacitance is monitor...

Journal: :Nano letters 2014
Gang Shi Yuranan Hanlumyuang Zheng Liu Yongji Gong Weilu Gao Bo Li Junichiro Kono Jun Lou Robert Vajtai Pradeep Sharma Pulickel M Ajayan

Conventional wisdom suggests that decreasing dimensions of dielectric materials (e.g., thickness of a film) should yield increasing capacitance. However, the quantum capacitance and the so-called "dead-layer" effect often conspire to decrease the capacitance of extremely small nanostructures, which is in sharp contrast to what is expected from classical electrostatics. Very recently, first-prin...

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