Patent ID: 8224244

Claim:
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.