Simulation of Self-heating HBTs Based on Isothermal Gummel-Poon Model

Based on the correlation between the electron and hole injection currents at the emitter junction, a simple dc model of self-heating HBTs has been developed by introducing three physically-based parameters into the isothermal Gummel-Poon model, which is easy to construct and implant to circuit simulators. Both the self-heating and the anbient temperature effects can be simulated accurately. The electrical and thermal parameters of HBTs can be evaluated from the extracted model parameters, and a novel method for separating the base current components has also be developed.