Apparatus for receiving telemetry signals from active implantabl

Details Apparatus for receiving telemetry signals from active implantabl Apparatus for receiving telemetry signals from active implantabl

1997-03-21

1998-04-21

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 1375

Patent

active

057413150

ABSTRACT:
A device for the reception of signals emitted by an active implanted medical device. The device has a signal collector coil for the reception of a magnetic induction which receives a useful signal component (B.sub.s) emitted by the implanted device (26) and a parasitic signal component (B.sub.p) of external origin. There is at least one collecting coil (12) wound on a first portion (14) of a magnetic circuit and at least one compensation coil (22) wound on a second portion (20) of the magnetic circuit, the two portions of the magnetic circuit belonging to a common magnetic element (16) and being configured in a manner such that, when the device is disposed in face of the implanted device, the collecting coil is essentially crossed one time by the magnetic induction field lines of the useful signal component (B.sub.s) and the compensation coil is crossed essentially twice, in opposite direction, by the same magnetic induction field lines, thereby allowing to discriminate the useful signal component for improved signal to noise ratios and high speed data transmission.

REFERENCES:
patent: 4494545 (1985-01-01), Slocum et al.
patent: 4542532 (1985-09-01), McQuilkin
patent: 4985922 (1991-01-01), Kolbert
patent: 5562714 (1996-10-01), Grguious
patent: 5630835 (1997-05-01), Brownlee
Deschamps, et al. U.S. Patent Application No. 08/363,742.

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