Direct extraction of SPICE Gummel-Poon parameters for high frequency modeling

A method to directly extract the DC and AC SPICE Gummel-Poon parameters without optimization is presented. The DC extraction uses linear or explicit extraction equations. The AC extraction involves obtaining the SPICE AC equivalent circuit from measured S-parameter data, and then extracting the SPICE parameters from the bias dependence of the AC equivalent circuit elements. By comparing measured and simulated S-parameters, it is verified that the resulting parameter set provides accurate modeling across frequency and bias, making accurate circuit simulation and statistical studies possible