Investigation of geometry dependence on MOSFET linearity in the impact ionization region using Volterra series
Device geometry and bias dependence on IMD at breakdown is examined. Lower IM3 for shorter gate length MOSFET at breakdown is attributed to nonlinear cancellation. Decreased total width reduces IM3 at breakdown due to a more obvious avalanche delay. This analysis can benefit CMOS PA designs at breakdown with reliability considered.
volterra series gate length intermodulation distortion avalanche breakdown gate width