Power vdmos ( vertical double - diffusion mosfet ) is the most favorable device available for high speed , medium power applications because of its characteristics such as high input impedance , high power gain , easy to drive and good thermal stability 功率vdmos (垂直雙擴散mosfet )以其高輸入阻抗、高功率增益、驅動電路簡單和熱穩定性好等優點,在高速度和中等功率場合得到了廣泛的應用。