Implanted apparatus disabling switching regulator operation to allow radio frequency signal reception
US5235980A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Dec 5, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implant for stimulating the vagus nerve receives commands over a radio frequency link. The implant disables a voltage convertor used in providing the stimulation signal at periodic intervals to monitor for communications attempts. The implant provides radio frequency marker pulses before providing stimulation signals of certain frequencies. During the providing of stimulation signals the implant monitors the voltage overhead present between the voltage source and the load and adjusts the overhead to a desired level. The implant changes the voltage applied to certain internal components during stimulation periods to allow full power operation during those intervals and reduced power levels at other intervals. The implant is reset by the placing a magnet in a given location in conjunction with the application of a radio frequency transmission for a given period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.