Coherent inductive communications link for biomedical applicatio

Details Coherent inductive communications link for biomedical applicatio Coherent inductive communications link for biomedical applicatio

1983-03-08

1985-12-31

Howell, Kyle L.

Surgery

Truss

Pad

128419PT, 128903, 604 65, A61N 136

Patent

active

045614431

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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patent: 4107459 (1978-08-01), Stamper
patent: 4223679 (1980-09-01), Schulman et al.
patent: 4373527 (1983-02-01), Fischell
patent: 4390022 (1983-06-01), Calfee et al.
patent: 4404972 (1983-09-01), Gordon et al.
patent: 4441210 (1984-04-01), Hochmair et al.

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