Coherent inductive communications link for biomedical applications
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United States of America Patent
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-
Dec 31, 1985
Grant Date -
N/A
app pub date -
Mar 8, 1983
filing date -
Mar 8, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-way coherent inductive communications link between an external transceiver and an internal transceiver located in a biologically implanted programmable medical device. Digitally formatted command data and programming data is transmitted to the implanted medical device by frequency shift keying the inductive communications link. Internal transceiver is powered by the inductive field between internal and external transceivers. Digitally formatted data is transmitted to external transceiver by internal transceiver amplitude modulating inductive field. Immediate verification of the establishment of a reliable communications link is provided by determining existence of frequency lock and bit phase lock between internal and external transceivers.
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