Magnetic field detector
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United States of America Patent
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Dec 9, 1997
Issued Date -
N/A
app pub date -
Dec 20, 1996
filing date -
Dec 15, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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