A small-signal, one-flux analysis of short-base transport

M. A. Alam; Shin Ichi Tanaka; M. S. Lundstrom

doi:10.1016/0038-1101(94)E0043-E

A small-signal, one-flux analysis of short-base transport

M. A. Alam, Shin Ichi Tanaka, M. S. Lundstrom

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

In this paper, we present an exactly solvable small-signal model to analyze transport in the base region of a bipolar transistor. Both graded-base and uniform-base structures are considered. The solutions describe both ballistic and diffusive transport under specific, simplifying conditions. Moreover, these results are in excellent agreement with a numerical solution of the Boltzmann equation. This model predicts a number of interesting features of the current-gain factor α(f) in the quasi-ballistic regime and explains the importance of scattering, however small, on the base transport properties of electrons. Finally, we use this model to interpret some recent experiments on short-base transport.

Original language	English
Pages (from-to)	177-182
Number of pages	6
Journal	Solid State Electronics
Volume	38
Issue number	1
DOIs	https://doi.org/10.1016/0038-1101(94)E0043-E
Publication status	Published - 1995 Jan
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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abstract = "In this paper, we present an exactly solvable small-signal model to analyze transport in the base region of a bipolar transistor. Both graded-base and uniform-base structures are considered. The solutions describe both ballistic and diffusive transport under specific, simplifying conditions. Moreover, these results are in excellent agreement with a numerical solution of the Boltzmann equation. This model predicts a number of interesting features of the current-gain factor α(f) in the quasi-ballistic regime and explains the importance of scattering, however small, on the base transport properties of electrons. Finally, we use this model to interpret some recent experiments on short-base transport.",

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AU - Tanaka, Shin Ichi

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N2 - In this paper, we present an exactly solvable small-signal model to analyze transport in the base region of a bipolar transistor. Both graded-base and uniform-base structures are considered. The solutions describe both ballistic and diffusive transport under specific, simplifying conditions. Moreover, these results are in excellent agreement with a numerical solution of the Boltzmann equation. This model predicts a number of interesting features of the current-gain factor α(f) in the quasi-ballistic regime and explains the importance of scattering, however small, on the base transport properties of electrons. Finally, we use this model to interpret some recent experiments on short-base transport.

AB - In this paper, we present an exactly solvable small-signal model to analyze transport in the base region of a bipolar transistor. Both graded-base and uniform-base structures are considered. The solutions describe both ballistic and diffusive transport under specific, simplifying conditions. Moreover, these results are in excellent agreement with a numerical solution of the Boltzmann equation. This model predicts a number of interesting features of the current-gain factor α(f) in the quasi-ballistic regime and explains the importance of scattering, however small, on the base transport properties of electrons. Finally, we use this model to interpret some recent experiments on short-base transport.

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