The circuit arrangement has a mains connection, a mains switch with two switching contacts, a demagnetization coil and a switch-mode power supply, which contains a driver circuit for producing a control voltage for the switching transistor of the switch-mode power supply. A first switching contact of...http://www.google.co.uk/patents/US7120003?utm_source=gb-gplus-sharePatent US7120003 - Circuit arrangement with power factor correction, as well as a corresponding appliance
