Ej. Martinez et al., GATE CURRENT MODEL FOR THE HOT-ELECTRON REGIME OF OPERATION IN HETEROSTRUCTURE FIELD-EFFECT TRANSISTORS, I.E.E.E. transactions on electron devices, 45(10), 1998, pp. 2108-2115
A model to describe the dependence of the gate current with source-to-
drain voltage was developed and used to predict the performance of AlG
aAs/InGaAs/GaAs HFET's. Our model describes the charge injection trans
istor (CHINT) regime of operation and account for real-space electron
transport. In this model, the saturation of the hot-electron gate curr
ent is explained by the rapid drop in the energy relaxation time cause
d by the real-space transfer of electrons. Good correlation between th
e experimental and theoretical data was found for temperatures ranging
from 198 to 398 K. Our experimental and theoretical results should be
accounted for in the design of HFET devices and integrated circuits.