Implantable stimulator device with magnetic field sensing circuit
US10589090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2017 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Feb 23, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F17/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable pulse generator (IPG) for an implantable medical device is disclosed herein. The IPG is capable of sensing the presence of an external magnetic field, such as a magnetic field associated with magnetic resonance imaging (MRI). The IPG includes a circuit that contains a magnetic core inductor and that is configured to boost a first voltage to a second voltage and use the second voltage to drive a current through a load. In a strong magnetic field, the magnetic core of the inductor becomes magnetically saturated, causing the inductance of the inductor to sharply drop. The inductance drop can be detected, for example, by detecting an increase in the second voltage. The circuit may be a boost converter circuit used to provide a compliance voltage for operation of the IPG.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.