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Filtering telemetry signals emitted by a medical device

  • US 5,891,184 A
  • Filed: 06/04/1997
  • Issued: 04/06/1999
  • Est. Priority Date: 06/04/1996
  • Status: Expired due to Term
First Claim
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1. A filter (26), for receiving at an input a first signal delivered by a receiving circuit (16-24) in response to a second signal emitted by a medical device (10), the second signal being in the form of a magnetic induction, said medical device comprising a metallic case having a material and a geometry, the filter characterized in that it comprises a compensation stage (42) having in the frequency domain a transfer function of the form:

  • ##EQU5## where fc is a parameter chosen according to the geometry and the material of the metallic case of the medical device (10), and where j=√

    -1.

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