Patent ID: 8054159

Claim:
A communication apparatus having a human body contact sensing function wherein the communication apparatus performs communication in contact with a central processing unit and a human body, the communication apparatus comprising: an electrode that comes in contact with the human body; a contact sensor configured to connect to the electrode, and instruct the central processing unit to perform an initial operation if contact with the human body is sensed; and a data processing unit configured to receive a control signal from the central processing unit so as to select whether to transmit or receive data, and perform a transmitting or receiving operation according to the control signal, wherein the data processing unit is configured to perform transmitting and receiving of the data by using a time-division method, wherein the data processing unit comprises: a first receiver configured to restore a base-band signal received through the human body into an original digital signal, a first transmitter configured to output a signal received from the central processing unit to the human body as a base-band signal, and a first switch that is connected to the transmitter and the receiver, and is configured to select whether to transmit or receive the data to/from the human body in response to the control signal.