Simulation of total dose influence on analog-digital SOI/SOS CMOS circuits with EKV-RAD macromodel

An EKV-RAD macromodel for SOI/SOS MOSFET with account for radiation effects is developed using a subcircuit approach. As an addition to the standard version of the EKV model 1) radiation dependencies of parameters VTO, GAMMA, KP, E0 are introduced and 2) additional circuit elements to account for floating-body effects and radiation-induced leakage currents under static and dynamic radiation influence are connected. Maximum simulation error is 5-7% in the dose range up to 1 Mrad. It is shown that EKV-RAD spends less CPU time by 15-30% for analog and 40-50% for digital SOI/SOS CMOS circuits simulations compared to BSIM-SOI-RAD model.