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. 18, 2017
Filed:
Apr. 04, 2012
David P. Olson, Minnetrista, MN (US);
Nicholas A. Delisi, Blaine, MN (US);
Jay T. Eisch, Wyoming, MN (US);
Philip R. Labrosse, Arden Hills, MN (US);
Joseph J. Nolan, Minnetonka, MN (US);
David P. Olson, Minnetrista, MN (US);
Nicholas A. Delisi, Blaine, MN (US);
Jay T. Eisch, Wyoming, MN (US);
Philip R. LaBrosse, Arden Hills, MN (US);
Joseph J. Nolan, Minnetonka, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
Techniques are disclosed for tuning a frequency at which an external device transcutaneously transfers energy. The transferred energy may be used to charge a rechargeable power source of an implantable medical device (IMD) and/or to power the IMD directly. One embodiment relates to a charging system that may comprise a circuit to drive a primary coil of an external device at a drive frequency and a control circuit to tune the drive frequency based on a characteristic of a monitored signal that is associated with the primary coil. The characteristic is not present when the primary coil is being driven at a resonant frequency of the system. In a specific example, the characteristic comprises a stub pulse and the control circuit is configured to tune the drive frequency based on at least one of a relative timing and a width of the stub pulse.