Patent ID: 7680533

Claim:
An energy delivery device comprising: an energy storage device; an energy discharge circuit comprising a first switch electrically connected to said energy storage device, said energy discharge circuit being selectively operable to deliver to a load energy from said energy storage device in a form of at least one energy pulse; and a disarm circuit which comprises said first switch, said disarm circuit being selectively operable to reduce energy in said storage device, said energy discharge circuit comprising an H-bridge circuit comprising four delivery switches which are operable to deliver said at least one energy pulse, said first switch being one of said delivery switches, wherein said energy discharge circuit further comprises a controller and a control circuit for said first switch, said controller controlling said energy discharge circuit to selectively cause delivery of an energy pulse to said load or energy reduction of said storage device, wherein said controller uses said disarm circuit to selectively reduce energy in said storage device to a predetermined lower energy value based on load requirements, the predetermined lower energy value being sufficient to defibrillate the load.