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Large‐signal and small‐signal electronic equivalent circuits for a field electron emitter
Author(s) -
Hagmann M. J.,
Mousa M. S.,
Brugat M.,
Sheshin E. P.,
Baturin A. S.
Publication year - 2004
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1902
Subject(s) - common emitter , signal (programming language) , electronic circuit , field electron emission , context (archaeology) , resistor , field (mathematics) , filter (signal processing) , electron , equivalent circuit , optoelectronics , capacitance , physics , electrical engineering , voltage , materials science , computer science , engineering , electrode , mathematics , paleontology , quantum mechanics , pure mathematics , biology , programming language
Large‐signal and small‐signal electronic equivalent circuits are developed to describe signal generation by a field electron emitter, with and without a ballast resistor. It is shown that different small‐signal equivalent circuits are needed for the cases where a small alternating voltage variation is applied and where the tunneling process is directly modulated, e.g. by directing a laser at the field emitter. The role of circuit resistances and of the parasitic capacitance between the emitter and its surroundings is crucially different in the two cases, with low‐pass filter behaviour exhibited in the first case and high‐pass filter behaviour in the second. Some consequences for the technical use of a field electron emitter as a non‐linear device are discussed, particularly in applications that involve laser‐assisted field electron emission and in the context of testing field emission tubes. Copyright © 2004 John Wiley & Sons, Ltd.