Mathematical treatment for HS MOSFET turn off

The race to produce the fastest MOSFET is heating up right now between all the top semiconductor companies around the world. MOSFETs with gate to drain charge, Qgd, of 2.2nC are available now in engineering samples and talk of Qgd of less than 2nC early next year was announced. These figures should theoretically translate into doubling the switching speeds of the commercially available MOSFETs leading to higher efficiency and higher switching frequencies.