Logic Gates
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Estudo numÃrico de acopladores asimÃtricos aplicados na implementaÃÃo de portas lÃgicas totalmente Ãpticas / Numerical study of asymmetric couplers applied in the implementation of logical gates totally optical
Nesta pesquisa, apresentamos uma investigaÃÃo numÃrica da transmissÃo e do chaveamento de sÃlitons fundamentais em acopladores duplos nÃo-lineares, constituÃdos por fibras Ãpticas com Ãndice de dispersÃo decrescente (DDF). SÃo propostas portas lÃgicas Ãpticas baseadas na utilizaÃÃo de um acoplador direcional nÃo linear (NLDC) duplo assimÃtri
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2006
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14. ImplementaÃÃo de portas lÃgicas atravÃs da modulaÃÃo de pulsos por posiÃÃo (PPM) em filtros acÃstico-Ãpticos sintonizÃveis. / Implementation of optic gates through the pulse position modulation (PPM) in acoustic optical tunable filter (AOTF)
Nesta dissertaÃÃo foi estudada a aplicaÃÃo do filtro AcÃstico-Ãptico SintonizÃvel (AOTF), com a ModulaÃÃo de Pulsos por PosiÃÃo (PPM), objetivando implementar, utilizando o mÃtodo de Runge-Kutta de 4a ordem, portas lÃgicas (OR-OU e AND-E) Ãpticas operando com pulsos de luz ultracurtos (2ps). Neste trabalho à investigado o desempenho das portas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/07/2006
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15. Projeto e implementação de circuitos classificadores digitais com controle da generalização baseado na regra do vizinho-mais-próximo modificada
This work aims at the implementation of classifying binary patterns with digital circuits in order to get a embedded system with the following features: portability, on-line training, operating in real time and with capacity of generalization. The proposed method makes use of training data filtering (or selection) before digital circuit synthesis. It is prop
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/2006
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16. Estudo do desempenho de acoplador direcional não linear duplo assimétrico de fibras ópticas operando portas lógicas. / Study of the performance of assymmetrical two-core non linear directional fiber coupler operating logic gates
We investigate the performance of three different non linear directional assymmetrical fibers couplers that include a profile of self-modulation of increasing and decreasing phase. The asymmetry is associated with the profile of self-modulation of phase of one of the chanels. Initially, we investigate the performance of the considered coupler using ultrashor
Publicado em: 2006
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17. Implementaçao de porta lógicas ópticas com acoplador direcional não linear triplo planar simétrico de fíbras ópticas. / IMPLEMENTATION OF OPTIC LOGICAL GATES WITH THREE-CORE NONLINEAR DIRECTIONAL SYMMETRIC FIBER COUPLER
Neste trabalho, portas lógicas ópticas são propostas a partir da utilização de um acoplador direcional não linear (NLDC) triplo planar simétrico de fibra óptica e com um dos guias operando como controle. Para tal fim, obtemos as características de transmissão do acoplador e, em seguida, fizemos uma análise do coeficiente de extinção e do fator d
Publicado em: 2006
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18. Quantum information processing through nuclear magnetic resonance
We discuss the applications of Nuclear Magnetic Resonance (NMR) to quantum information processing, focusing on the use of quadrupole nuclei for quantum computing. Various examples of experimental implementation of logic gates are given and compared to calculated NMR spectra and their respective density matrices. The technique of Quantum State Tomography for
Brazilian Journal of Physics. Publicado em: 2005-09
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19. NEW METHODOLOGY TO THE ESTIMATIVE OF CAPACITANCE AND POWER CONSUMPTION OF COMPLEX LOGIC GATES CMOS AT LOGIC LEVEL / NOVA METODOLOGIA PARA A ESTIMATIVA DE CAPACITÂNCIA E CONSUMO DE POTÊNCIA DE PORTAS LÓGICAS COMPLEXAS CMOS NO NÍVEL LÓGICO
This dissertation presents a methodology of capacitance estimation and power consumption in CMOS circuits combinational constituted basically of complex logic gates at logic level. The main objective in the development of this method is to provide a fast estimate of the power consumption of circuits at the logical design gates. Of this form, the considered m
Publicado em: 2005
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20. Estudo de portas lógicas quânticas de dois qubits definidas em um subespaço livre de decoerência para um sistema de quatro qubits acoplado ao resto do universo por um agente degenerado / A study of two-qubit quantum logic gates defined in a decoherence free subspaces for a four-qubit system coupled to the rest of the universe via a degenerate agent
In this dissertation we studied theoretical aspects of some recent proposals of passive quantum information processing, that is, discarding error correction protocols. Falling back upon the creation of decoherence-free subspaces through a physical system of four spins coupled to the rest of the universe by a degenerate agent, we showed to be possible to buil
Publicado em: 2004
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21. Determinação de regras de projeto e de parametros de simulação de um processo nMOS para fabricação de circuitos integrados
This work presents the development and the improvement of an nMOS device fabrication process used for microelectronics research and education. The electric characterization and the parameter extraction procedure for SPICE simulation were also presented. Initially, a study of the nMOS device fabrication process used in courses and researches at the center for
Publicado em: 2002
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22. Projeto e construção de uma porta universal CMOS em logica ternaria
In this work we developed a universal gate in temary logic through Post algebra; using this gate we could develop some well known circuits from binary logic like Flip-Flops and Adders. These circuits were simulated using Spice and the Lay-Out was developed using tools like Tanner and L YS; to construct the integrated circuit we use a foundry that we already
Publicado em: 2001
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23. Logic gates using high Rydberg states
Connected logic gates can be operated on the levels of one molecule by making use of the special properties of high Rydberg states. Explicit experimental results for the NO molecule are provided as an example. A number of other options, including that of several gates concatenated so as to operate as a full adder, are discussed. Specific properties of h
The National Academy of Sciences.
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24. Demonstration of a universal surface DNA computer
A fundamental concept in computer science is that of the universal Turing machine, which is an abstract definition of a general purpose computer. A general purpose (universal) computer is defined as one which can compute anything that is computable. It has been shown that any computer which is able to simulate Boolean logic circuits of any complexity is such
Oxford University Press.