Transit time parameter extraction for the HICUM bipolar compact model

This paper presents a extraction procedure for the transit time parameters of the HICUM bipolar compact model. The extraction routines use as input the measured small-signal current gain in the -20 dB/decade falloff region as a function of the collector current and the collector-emitter (or collector-base) voltage. All HICUM transit time parameters are extracted in a straightforward manner, no optimisation is necessary. Especially the critical current value ICK is determined in a self consistent way.