To provide a data communication device which is capable of accurately making data communication even in an environment in which signals deteriorate in an S/N ratio.
A data communication device is equipped with a data transmitter 1 which carries out amplitude modulation on the basis of transmission data, and outputs signals from two transmission electrodes kept in contact with or located near a human body 3; and a receiving device 2 which receives signals outputted from the data transmitter 1 attached to the human body 3, demodulates the received signals, extracts an alternating component through an alternating component extracting part 11, and reads out a difference between a signal level of the alternating component and a predetermined reference value 70 through a signal reading part 12. The data receiving device 2 is equipped with a correlation determining part 13 which compares and determines a relative relation between the waveform of signals inputted to the signal reading part 12 and the reference value 70, and a correlation optimizing part which corrects a positional relation between the signal waveform and the reference value 70 to an optimal condition on the basis of the relative relation obtained through the correlation determining part 13.
DOI KANEYUKI
HASHIMOTO MASARU
KOYAMA MASAKI
SUZUKI YOSHIKO
