BSIM4 RF CMOS Modeling with UTMOST III

Introduction

The BSIM4 model provides a RF CMOS modeling capability. Prior to the BSIM4 model the RF modeling was accomplished by using macro models. The macro models were complex, contained many external elements and exhibited poor geometry scaling.

The BSIM4 RF modeling environment has been implemented in UTMOST III’s s-parameter measurement and modeling module. The “s_meas” routine in MOS module of UTMOST III can control Network Analyzers for measurement and data acquisition. The measured s-parameters can be viewed using the s_plots, z_plots, y_plots and h_plots routines. These routines can also be used for simulation and RF model parameter optimization purposes.