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:
Feb. 16, 1999
Filed:
Jun. 01, 1995
Theodore P Adams, Edina, MN (US);
Mark W Kroll, Minnetonka, MN (US);
Other;
Abstract
A method and apparatus for generating biphasic waveforms for an implantable defibrillator uses two disparate capacitor systems. A first phase of the biphasic waveform is generated from the charge stored in a first capacitor system, and a second phase of less energy than the first phase is generated from the charge stored in a second capacitor system. By using a second capacitor system for the second phase of the biphasic waveform that stores less energy than the first capacitor system, the overall size and power requirements of the implantable device can be reduced. In a preferred embodiment, the disparate capacitor systems have different effective capacitances, with the second capacitor system preferably having a higher effective capacitance, but a lower charging voltage, than the first capacitor system.