A buried-oxide trench-gate bipolar-mode JFET(BTB-JFET)with an oxide layer buried under the gate region to reduce the gate-drain capacitance Cgd is proposed.
It is shown that neglecting the gate-drain capacitance of the MOSFET would lead to an overestimation of the optimum device width in the CMOS source degenerated LNA.
TrenchMOS was studied to improve the breakdown voltage(BVds),specific on-resistance(Ron) and gate-drain charge density(Qgd),which are the three most important targets of TrenchMOS.