Search International and National Patent Collections

1. (WO2004030759) METHOD AND APPARATUS FOR MAINTAINING ENERGY STORAGE IN AN ELECTRICAL STORAGE DEVICE

Pub. No.:    WO/2004/030759    International Application No.:    PCT/US2003/030261
Publication Date: Apr 15, 2004 International Filing Date: Sep 26, 2003
IPC: A61N 1/39
Applicants: MEDTRONIC, INC.
Inventors: NORTON, John, D.
Title: METHOD AND APPARATUS FOR MAINTAINING ENERGY STORAGE IN AN ELECTRICAL STORAGE DEVICE
Abstract:
A method and an apparatus for performing maintaining a charge in an electrical energy storing device, such as a capacitor. A set-point voltage for the electrical energy storage device is used during an initial device charging process to charge the storage device to the set-point voltage. A charge maintenance process is also performed that offsets charge loss due to leakage currents, polarization currents and the like. The charge maintenance process involves providing a charge maintenance current to the storage device until the storage device is therapeutically discharged (e.g., during cardiac defibrillation therapy delivery).