Clock synchronization in an implantable medical device system
First Claim
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1. A system comprising:
- at least one primary implantable medical device (IMD) configured to operate based on a local clock;
at least one secondary IMD communicatively coupled to the primary IMD and configured to receive at least one communication pulse and at least one power pulse from the primary IMD, wherein the at least one power pulse comprises a first power pulse and the secondary IMD is operable to estimate, based on the first power pulse, an estimated arrival time of a subsequent power pulse;
wherein the secondary IMD comprises;
a communications clock unit configured to generate a first clock of the secondary IMD based on the at least one communication pulse; and
a general purpose clock unit configured to generate a second clock different than the first clock based on the at least one power pulse.
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Abstract
This disclosure is directed to the synchronization of clocks of a secondary implantable medical device (IMD) to a clock of a primary IMD. The secondary IMD includes a communications clock. The communications clock may be synchronized based on at least one received communications pulse. The secondary IMD further includes a general purpose clock different than the communications clock. The general purpose clock may be synchronized based on at least one received power pulse. The communications clock may also be synchronized based on the at least one received power pulse.
225 Citations
18 Claims
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1. A system comprising:
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at least one primary implantable medical device (IMD) configured to operate based on a local clock; at least one secondary IMD communicatively coupled to the primary IMD and configured to receive at least one communication pulse and at least one power pulse from the primary IMD, wherein the at least one power pulse comprises a first power pulse and the secondary IMD is operable to estimate, based on the first power pulse, an estimated arrival time of a subsequent power pulse; wherein the secondary IMD comprises; a communications clock unit configured to generate a first clock of the secondary IMD based on the at least one communication pulse; and a general purpose clock unit configured to generate a second clock different than the first clock based on the at least one power pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device, comprising:
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means for receiving at least one communications pulse for communicating a message; means for receiving at least one power pulse for powering the device, wherein the at least one power pulse comprises a first power pulse; means for estimating, based on the second clock, an estimated arrival time of a subsequent power pulse; means for generating a first clock based on the at least one communications pulse; and means for generating a second clock different than the first clock based on the at least one power pulse. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification