Magnetic field detector

Details Magnetic field detector Magnetic field detector

1995-12-14

1997-09-02

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 102

Patent

active

056626940

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.

REFERENCES:
patent: 4541431 (1985-09-01), Ibrahim et al.
patent: 4611127 (1986-09-01), Ibrahim et al.

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