Impact of high-k spacer on asymmetric source underlap Gate Stack DG-MOSFET. Subthreshold analog/RF performance of asymmetric source underlap Gate Stack DG-MOSFET. Extraction of AC small signal parameters of asymmetric source underlap Gate Stack DG-MOSFET. RF parameters extraction using the Non Quasi Static (NQS) model of the A(S)-U-DG-GS MOSFET. Single stage amplifier analysis of A(S)-U-DG-GS MOSFET.