Evaluating the impedance field through several transport models: A comparison

The article presents a critical discussion on the evaluation of the impedan ce field for noise analysis by means of several transport models. The model s considered are the drift-diffusion model, the full hydrodynamic model, an d the scattered packet method for the direct solution of the Boltzmann tran sport equation. The comparison is carried out on a canonical Si p(+)pp(+) d iode at ambient temperature. The agreement found between the approaches is good, thus suggesting that the evaluation of the impedance field does not r equire any additional care with respect to other, more conventional operati ng conditions. (C) 1999 American Institute of Physics. [S0021-8979(99)01904 -0].