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Coherent inductive communications link for biomedical applicationsA 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.
Document ID
20080005892
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Hogrefe, Arthur F.
Radford, Wade E.
Date Acquired
August 24, 2013
Publication Date
December 31, 1985
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
Patent Number: US-PATENT-4,561,443
Patent Application Number: US-PATENT-APPL-SN-473248
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,561,443
Patent Application
US-PATENT-APPL-SN-473248

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