Method and apparatus for the suppression of far-field interference signals for implantable device data transmission systems
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United States of America Patent
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-
May 20, 1997
Grant Date -
N/A
app pub date -
Jul 24, 1995
filing date -
Jul 24, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic device for non-invasively communicating with an implanted device, such as, for example, a cardiac pacemaker. The electronic programming device includes a transceiver having an antenna, a transmitter portion and a receiver portion. The antenna portion is arranged to have two coils arranged in series phase opposition to suppress the effects of far-field interference signals on received near-field signals from the implanted device, when the transceiver is receiving data from the implanted device. The electronic device further includes means to isolate the transmit and receive functions thereof to prevent cancellation of the transmitted signal when the transceiver is in the transmit mode.
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