External charging device for charging an implantable medical device and methods of regulating duty of cycle of an external charging device
US8332040B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2009 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Aug 6, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3787
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In one embodiment, an external charging device for recharging an implanted medical device, comprises: a battery for powering the external charging device; a coil for radiating RF power; drive circuitry for driving the coil according to a duty cycle; circuitry for generating a signal that is indicative of an amount of current flowing through the coil; and control circuitry for controlling the drive circuitry, wherein the control circuitry is operable to process the signal from the circuitry for generating to detect when a coil of the implantable medical device temporarily ceases absorbing RF power, the control circuitry modifying the duty cycle in response to detection of the coil of the implantable medical device temporarily ceasing absorbing RF power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.