A push-pull output stage for driving a motor which provides an auxiliary power supply Vaux above supply voltage Vcc by using highside MOSFETs which do not have source-body shorts, and by connecting a capacitor to the poles of the motor through rectifying diodes which output flyback pulses to the capacitor....http://www.google.de/patents/US5377094?utm_source=gb-gplus-sharePatent US5377094 - Push-pull output stage for driving motors which generates auxiliary voltage supply
