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Local noise analysis of a Schottky contact: combined thermionic-emissiondiffusion theory
Gomila Lluch, Gabriel; Bulashenko, Oleg; Rubí Capaceti, José Miguel
Universitat de Barcelona
A theoretical model for the noise properties of Schottky barrier diodes in the framework of the thermionic-emission¿diffusion theory is presented. The theory incorporates both the noise inducedby the diffusion of carriers through the semiconductor and the noise induced by the thermionicemission of carriers across the metal¿semiconductor interface. Closed analytical formulas arederived for the junction resistance, series resistance, and contributions to the net noise localized indifferent space regions of the diode, all valid in the whole range of applied biases. An additionalcontribution to the voltage-noise spectral density is identified, whose origin may be traced back tothe cross correlation between the voltage-noise sources associated with the junction resistance andthose for the series resistance. It is argued that an inclusion of the cross-correlation term as a newelement in the existing equivalent circuit models of Schottky diodes could explain the discrepanciesbetween these models and experimental measurements or Monte Carlo simulations.
Soroll
Díodes
Semiconductors
Mètode de Montecarlo
Control del soroll
Microelectrònica
Diodes
Semiconductors
Monte Carlo method
Noise control
Microelectronics
Noise
(c) American Institute of Physics, 1998
Artículo
American Institute of Physics
         

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