The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2007
Filed:
Mar. 25, 2005
William J. Havel, Maple Grove, MN (US);
Paul J. Degroot, Brooklyn Park, MN (US);
Thomas W. Sinner, New Brighton, MN (US);
Kevin Kuehn, Shoreview, MN (US);
Gary Kemmetmueller, Rogers, MN (US);
Warren W. Wold, Edina, MN (US);
William J. Havel, Maple Grove, MN (US);
Paul J. Degroot, Brooklyn Park, MN (US);
Thomas W. Sinner, New Brighton, MN (US);
Kevin Kuehn, Shoreview, MN (US);
Gary Kemmetmueller, Rogers, MN (US);
Warren W. Wold, Edina, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
The present invention outlines structures and methods for delivering a controllable amount of energy to a patient by automatically compensating for the load impedance detected by an implantable-cardioverter defibrillator (ICD). The invention employs high speed, switching power converter technology for the efficient generation of high energy, arbitrarywaveforms. Unlike a linear amplifier, switching power converters deliver high-energy waveforms with an efficiency that is independent of the size and amplitude of the desired waveform. An ICD that uses a switching power converter to deliver the desired energy to the patient stores the energy to be delivered in a storage capacitor. The converter then transforms this energy into an arbitrarily shaped output voltage-controlled or current-controlled waveform by switching the storage capacitor in and out of the output circuit at a high rate of speed. Preferably, the waveform comprises a ramp-type waveform.