A physical simulation model for field emission triode

Chih Wen Lu*, Chung Lee Len

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


A simple but accurate physical model which can be incorporated into circuit simulation programs such as SPICE for the field emission triode (FET) is developed. The model is based on the Fowler-Nordheim (F-N) current density-electric field (J-E) relationship. An electric field form is adopted to calculate the current density distribution along the surface of the sphere-shape tip. The cathode current is obtained by integration of the current density over the emission surface. The gate current is derived by the same integration but over part of the emission area. A procedure to extract the values for the parameters of the model is also given. The model and the procedure has been applied to experimental devices to demonstrate its accuracy.

Original languageEnglish
Pages (from-to)2238-2244
Number of pages7
JournalIEEE Transactions on Electron Devices
Issue number10
StatePublished - 1998


  • Field emission triode
  • Fowler-nordheim
  • Simulation model

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