Synchronous telemetry transmission between a programmer and an autonomous device

  • US 5,899,931 A
  • Filed: 06/04/1997
  • Issued: 05/04/1999
  • Est. Priority Date: 06/04/1996
  • Status: Expired due to Term
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First Claim
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1. A system comprising:

  • an active implanted medical device;

    a programmer for said active implanted medical device; and

    a bi-directional synchronous serial connection for signals passing between the active implanted medical device and the programmer;

    the active implanted medical device (10) further comprising a timing clock having a frequency (18) and means for emitting a telemetry signal to pass to the programmer and for receiving a telemetry signal passing from the programmer, said means operating under a temporal control of the active implanted medical device timing clock;

    the programmer (24) further comprising a programmable timing clock (42) having a frequency that is adjustable in phase, means for emitting a telemetry signal to pass to the active implanted medical device and for receiving a telemetry signal passing from the active implanted medical device, said means operating under the temporal control of the programmer timing clock, a means of synchronization control (32, 36, 38,

         40) cooperating with said programmable clock for analyzing a telemetry signal received from the active implanted medical device and to lock in phase the programmable clock on the active implanted medical device timing clock.

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