Frequency dispersion in partially depleted SOI MOSFET output resistance

The small signal characteristics in the frequency domain are investigated to quantify the impact of floating body on analog circuits. An enhancement of output resistance at a high frequency in partially depleted devices is observed and is attributed to the floating body potential fluctuation under the influence of hole accumulation in the neutral body and gate coupling. At a high current level, self-heating effect overrides the floating body effect and decreases the output resistance at a high frequency