Patent ID: 6441513
Filing Date: 2002-08-27
Classification: H03K

Abstract:
A switching circuit, comprising:one or more switching devices; at least one control and driving signal provider constructed and arranged to provide one or more control and driving signals at one or more output ports; and one or more detector and driver circuits, each having an input coupled to an output port and an output coupled to at least one of the switching devices, each constructed and arranged to (a) detect when a control and driving signal present at the output port is in an on state and, responsive thereto, drive at least one of the switching devices on by applying to it the control and driving signal, and (b) detect when the control and driving signal is in an off state and, responsive thereto, drive at least one of the switching devices off by applying to it the control and driving signal, wherein the at least one control and driving signal provider comprises a transformer having primary and secondary sides wherein one or more input ports comprise one or more primary windings on the primary side and the one or more output ports,comprise one or more secondary windings on the secondary side, the input of a first detector and driver circuit is coupled to a first of the secondary windings, and a first control and driving signal comprises a voltage waveform across the first secondary winding.