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Wireless transmission system for hearing devices

  • US 7,239,713 B2
  • Filed: 09/30/2003
  • Issued: 07/03/2007
  • Est. Priority Date: 09/30/2002
  • Status: Active Grant
First Claim
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1. A hearing device, comprising:

  • a radio device to transmit signals to a second hearing device, the radio device comprising;

    an antenna device for transmitting, the antenna device comprising a self-exciting oscillation circuit, including a coil and a first capacitor;

    the radio device further comprising;

    a first switch; and

    an amplifier and a series connection of a second capacitor and a second switch being connectable in parallel to the first capacitor by the first switch, so that the antenna circuit is excited by the amplifier when the first switch is in its conductive state and a resonance frequency of the self-exciting oscillation circuit can be modulated by switching the second switch while the first switch is in its conductive state.

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