DATA COMMUNICATION APPARATUS AND DATA COMMUNICATION METHOD

摘要

A response signal, which has a different frequency than an electric power supply signal and a data signal, is produced, and the data signal is received from a noncontact IC card (2) at a timing at which to transmit the response signal. In this way, the data signal received from the noncontact IC card (2) can be precisely demodulated without being affected by a modulated signal transmitted from a different data communication apparatus.