Communication method for implantable medical device
AssigneeMinnesota Mining and Manfacturing Company
InventorsStanley J. Crossett, Richard A. Nazarian, Michael Hamerly
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Abstract
A medical assembly, such as an artificial heart assembly, adapted to be implanted within a living subject is composed of an implantable data communications interface adapted to receive an encoded data signal from a data communications interface located outside the subject at a position remote from the medical assembly. The encoded data signal is transmitted in a plurality of periodic signal bursts, which are transmitted at a first frequency to represent a first data value and a second frequency to represent of second data value. Each of the bursts comprises a plurality of signal transitions having a third frequency greater than both the first and second frequencies.
Claims6
A method of communication between a first data communications interface implanted within a subject and a second data communications interface positioned at a remote location outside of said subject, said method comprising the steps of:
- (a) transmitting from said second data communications interface an encoded data signal in a plurality of periodic signal bursts, said signal bursts being transmitted at a first frequency to represent a first data value and a second frequency to represent of second data value, said second frequency being different than said first frequency, each of said bursts comprising a plurality of signal transitions having a third frequency, said third frequency being greater than said first frequency and greater than said second frequency;
- (b) receiving said encoded data signal from said second communications interface;
- (c) generating an envelope signal from said encoded data signal;
- and
- (d) decoding said envelope signal by detecting which portions of said envelope signal have a frequency substantially equal to said first frequency and which portions of said envelope signal have a frequency substantially equal to said second frequency.
Dependencies are inferred from the claim text.