Implantable device with output circuitry for simultaneous stimulation at multiple sites
US6125300A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1998 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Sep 11, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/378
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
There is provided an implantable device with two or more output stages for delivering concurrent output pulses to two or more sites within a patient's body. Each output circuit has a common architecture, including a switchable generator which has a plurality of storage capacitors and switches for arranging the capacitors either to be charged by the battery, or to discharge a stimulus pulse. A programmable regulator is provided for further regulation of the output voltage; and a multiplexer connects the output to the desired electrodes placed at the patient site. For concurrent dual pulse-dual site stimulation, a pair of active rectifier switches are connected between the negative terminal of each output stage and the battery positive terminal, whereby at the time of concurrent pulse delivery, the output stage having the greatest negative voltage relative to battery plus has its negative terminal connected to the battery plus terminal, while the other output stage is disconnected from the battery so that it floats. This arrangement reduces crosstalk current while ensuring continued positive biasing of the semi-conductor switches in each output stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.