Magnetic field detector
US5694952A · kind A · utility
182Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3718
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a magnetic field detector as well as in a combined telemetry and magnetic field detector unit in a medical implant, a magnetic field sensor with a coil and a diode are employed for determining the presence of a magnetic field. For making such a determination, the coil is charged by a source of voltage for a defined period of time, the time for the discharge of the coil through the diode depending on whether a magnetic field is present. A detection signal indicating the presence of a magnetic field is generated if the discharge time is less than a defined time threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.