A device for connecting and disconnecting a board in a hot state includes a board and a mother-board. The board has mounted thereon dynamic elements through which a low electric current flows during a clock signal disabled state, and a clock signal enable or disable circuit. When a board must be connected...http://www.google.de/patents/US5051606?utm_source=gb-gplus-sharePatent US5051606 - Method of connecting and disconnecting a board in a hot state
