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Communication apparatus

  • US 8,224,244 B2
  • Filed: 04/21/2008
  • Issued: 07/17/2012
  • Est. Priority Date: 10/25/2005
  • Status: Active Grant
First Claim
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1. A human body communication apparatus comprising:

  • an electrode unit, in direct contact with a human body, configured to transmit a base-band signal in the form of a current through the human body and receive a signal from the human body, wherein the base-band signal is a non-frequency-modulated signal;

    a high pass filter configured to eliminate noise included in the base-band signal received through the electrode unit;

    a comparator configured to compare the base-band signal transmitted through the high pass filter with a reference voltage;

    a controller configured to recover the base-band signal transmitted through the comparator, transmit the recovered signal to an external host located in a vicinity of the human body, and further configured to receive a data signal in the form of a current from the external host, generate a second base-band signal, and transmit the second base-band signal to the human body through the electrode unit; and

    an amplifier configured to amplify the signal transmitted from the high pass filter and transmit the amplified signal to the comparator.

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