A circuit for servicing a load connectable with a power supply is disclosed. The circuit includes a plurality of three-terminal switches and one control supply. The three-terminal switches define a series conduction path connectable between the power supply and the load. Each of the plurality of three...http://www.google.de/patents/US7508096?utm_source=gb-gplus-sharePatent US7508096 - Switching circuit apparatus having a series conduction path for servicing a load and switching method
