A switch driving circuit for driving a full-controlled power switch is disclosed, including a pulse-width modulation unit, a pulse transformer, an anti-interference module, a pulse-width demodulation unit and a driving-power amplifier. The sacks can be partially filled with a multitude of tubular bodies made of an oil-entrapping polymer, which have their longest dimension parallel to an axial hole. Conductive liners may be formed within the openings, and circuitry may be formed to control current flow through the conductive liners. A second field effect transistor of an opposite-type conductivity to the first field effect transistor, typically a p-channel MOSFET, is also provided.